Viggo Hansteen

• Martinez-Sykora, Juan; Leenarts, Jorrit; De Pontieu, Bart Walter; Nóbrega Siverio, Daniel Elias; Hansteen, Viggo; Carlsson, Mats & Szydlarski, Mikolaj Marcin (2020). Ion–neutral Interactions and Nonequilibrium Ionization in the Solar Chromosphere. Astrophysical Journal (ApJ).  ISSN 0004-637X.  889(2) . doi: 10.3847/1538-4357/ab643f
• Ortiz, Ada; Hansteen, Viggo; Nóbrega Siverio, Daniel Elias & Rouppe van der Voort, Luc (2020). Ellerman bombs and UV bursts: reconnection at different atmospheric layers. Astronomy and Astrophysics.  ISSN 0004-6361.  633(A58) . doi: 10.1051/0004-6361/201936574 Full text in Research Archive.
• Carlsson, Mats; De Pontieu, Bart Walter & Hansteen, Viggo (2019). New View of the Solar Chromosphere. Annual Review of Astronomy and Astrophysics.  ISSN 0066-4146.  57, s 189- 226 . doi: 10.1146/annurev-astro-081817-052044
• Cheung, M. C. M.; Rempel, M.; Chintzoglou, G.; Chen, F.; Testa, Paola; Martinez-Sykora, Juan; Sainz Dalda, Alberto; DeRosa, M. L.; Malanushenko, A.; Hansteen, Viggo; De Pontieu, Bart Walter; Carlsson, Mats; Gudiksen, Boris Vilhelm & McIntosh, Scott (2019). A comprehensive three-dimensional radiative magnetohydrodynamic simulation of a solar flare. Nature Astronomy.  ISSN 2397-3366.  3, s 160- 166 . doi: 10.1038/s41550-018-0629-3
• Cheung, Mark C. M.; De Pontieu, Bart Walter; Martinez-Sykora, Juan; Testa, Paola; Winebarger, Amy R.; Daw, Adrian N.; Hansteen, Viggo; Antolin, Patrick; Tarbell, Theodore D.; Wüelser, Jean Pierre & Young, Peter (2019). Multi-component Decomposition of Astronomical Spectra by Compressed Sensing. Astrophysical Journal (ApJ).  ISSN 0004-637X.  882(1) . doi: 10.3847/1538-4357/ab263d Full text in Research Archive.
• De Pontieu, Bart Walter; Martinez-Sykora, Juan; Testa, Paola; Winebarger, Amy R.; Daw, Adrian N.; Hansteen, Viggo; Cheung, Mark C. M. & Antolin, Patrick (2019). The Multi-slit Approach to Coronal Spectroscopy with the Multi-slit Solar Explorer (MUSE). Astrophysical Journal (ApJ).  ISSN 0004-637X.  888(1) . doi: 10.3847/1538-4357/ab5b03 Full text in Research Archive.
• Hansteen, Viggo; Ortiz, Ada; Archontis, Vasilis; Carlsson, Mats; Mendes Domingos Pereira, Tiago & Bjørgen, Johan Pires (2019). Ellerman bombs and UV bursts: transient events in chromospheric current sheets. Astronomy and Astrophysics.  ISSN 0004-6361.  626 . doi: 10.1051/0004-6361/201935376 Full text in Research Archive.
• Martinez-Sykora, Juan; Hansteen, Viggo; Gudiksen, Boris Vilhelm; Carlsson, Mats; De Pontieu, Bart Walter & Gošić, Milan (2019). On the Origin of the Magnetic Energy in the Quiet Solar Chromosphere. Astrophysical Journal (ApJ).  ISSN 0004-637X.  878(1) . doi: 10.3847/1538-4357/ab1f0b Full text in Research Archive.
• Bjørgen, Johan Pires; Sukhorukov, Andrii V.; Leenaarts, Jorrit; Carlsson, Mats; de la Cruz Rodriguez, Jaime; Scharmer, Göran B. & Hansteen, Viggo (2018). Three-dimensional modeling of the Ca II H and K lines in the solar atmosphere. Astronomy and Astrophysics.  ISSN 0004-6361.  611:A62 . doi: 10.1051/0004-6361/201731926 Full text in Research Archive.
• Martinez-Sykora, Juan; De Moortel, Ineke; De Pontieu, Bart Walter; Hansteen, Viggo & Carlsson, Mats (2018). Impact of Type II Spicules in the Corona: Simulations and Synthetic Observables. Astrophysical Journal (ApJ).  ISSN 0004-637X.  860(2) . doi: 10.3847/1538-4357/aac2ca Full text in Research Archive.
• Mendes Domingos Pereira, Tiago; Rouppe van der Voort, Luc; Hansteen, Viggo & De Pontieu, Bart Walter (2018). Chromospheric counterparts of solar transition region unresolved fine structure loops. Astronomy and Astrophysics.  ISSN 0004-6361.  611 . doi: 10.1051/0004-6361/201832762 Full text in Research Archive.
• Moreno-Insertis, F.; Hansteen, Viggo; Martinez-Sykora, Juan & Munoz, D. (2018). Small-scale Magnetic Flux Emergence in the Quiet Sun. Astrophysical Journal Letters.  ISSN 2041-8205.  859(2) . doi: 10.3847/2041-8213/aac648 Full text in Research Archive.
• Skjørten, Ingunn; Mykland Hilde, Janne; Melsom, Morten Nissen; Hisdal, Jonny; Hansteen, Viggo; Steine, Kjetil & Hummerfeldt, Sjur (2018). Exercise capacity in COPD patients with exercise-induced pulmonary hypertension. The International Journal of Chronic Obstructive Pulmonary Disease.  ISSN 1176-9106.  13, s 3599- 3610 . doi: 10.2147/COPD.S161175 Full text in Research Archive.
• Zacharias, Pia; Hansteen, Viggo; Leenaarts, Jorrit; Carlsson, Mats & Gudiksen, Boris Vilhelm (2018). Disentangling flows in the solar transition region. Astronomy and Astrophysics.  ISSN 0004-6361.  614 . doi: 10.1051/0004-6361/201732055 Full text in Research Archive.
• Guerreiro, Nuno Miguel Rodrigues; Haberreiter, M.; Hansteen, Viggo & Schmutz, W. (2017). Small-scale heating events in the solar atmosphere: II. Lifetime, total energy, and magnetic properties. Astronomy and Astrophysics.  ISSN 0004-6361.  603 . doi: 10.1051/0004-6361/201629795 Full text in Research Archive.
• Hansteen, Viggo; Archontis, Vasilis; Mendes Domingos Pereira, Tiago; Carlsson, Mats; Rouppe van der Voort, Luc & Leenaarts, Jorrit (2017). Bombs and Flares at the Surface and Lower Atmosphere of the Sun. Astrophysical Journal (ApJ).  ISSN 0004-637X.  839(1) . doi: 10.3847/1538-4357/aa6844 Full text in Research Archive.
• Martinez-Sykora, Juan; De Pontieu, Bart Walter; Carlsson, Mats; Hansteen, Viggo; Nobrega-Siverio, Daniel & Gudiksen, Boris Vilhelm (2017). Two-dimensional Radiative Magnetohydrodynamic Simulations of Partial Ionization in the Chromosphere. II. Dynamics and Energetics of the Low Solar Atmosphere. Astrophysical Journal (ApJ).  ISSN 0004-637X.  847(1) . doi: 10.3847/1538-4357/aa8866 Full text in Research Archive.
• Martinez-Sykora, Juan; De Pontieu, Bart Walter; Hansteen, Viggo; Rouppe van der Voort, Luc; Carlsson, Mats & Mendes Domingos Pereira, Tiago (2017). On the generation of solar spicules and Alfvenic waves. Science.  ISSN 0036-8075.  356(6344), s 1269- 1272 . doi: 10.1126/science.aah5412 Full text in Research Archive.
• Rouppe van der Voort, Luc; De Pontieu, Bart Walter; Scharmer, G. B.; de la Cruz Rodriguez, Jaime; Martinez-Sykora, Juan; Nobrega-Siverio, Daniel; Guo, L. J.; Jafarzadeh, Shahin; Mendes Domingos Pereira, Tiago; Hansteen, Viggo; Carlsson, Mats & Vissers, Gregal Joan Maria (2017). Intermittent Reconnection and Plasmoids in UV Bursts in the Low Solar Atmosphere. Astrophysical Journal Letters.  ISSN 2041-8205.  851(1) . doi: 10.3847/2041-8213/aa99dd Full text in Research Archive.
• Abbo, L.; Ofman, L.; Antiochos, S. K.; Hansteen, Viggo; Harra, L.; Ko, Y.-K.; Lapenta, G.; Li, B.; Riley, P.; Strachan, L.; von Steiger, R. & Wang, Y.-M. (2016). Slow Solar Wind: Observations and Modeling. Space Science Reviews.  ISSN 0038-6308.  201(1-4), s 55- 108 . doi: 10.1007/s11214-016-0264-1
• Carlsson, Mats; Hansteen, Viggo; Gudiksen, Boris Vilhelm; Leenaarts, Jorrit & De Pontieu, Bart Walter (2016). A publicly available simulation of an enhanced network region of the Sun. Astronomy and Astrophysics.  ISSN 0004-6361.  585:A4 . doi: 10.1051/0004-6361/201527226 Full text in Research Archive.
• Chatterjee, Piyali; Hansteen, Viggo & Carlsson, Mats (2016). Modeling Repeatedly Flaring δ Sunspots. Physical Review Letters.  ISSN 0031-9007.  116(10) . doi: 10.1103/PhysRevLett.116.101101 Full text in Research Archive.
• Kato, Yoshiaki; Steiner, Oskar; Hansteen, Viggo; Gudiksen, Boris Vilhelm; Wedemeyer, Sven & Carlsson, Mats (2016). Chromospheric and Coronal Wave Generation in a Magnetic Flux Sheath. Astrophysical Journal (ApJ).  ISSN 0004-637X.  827(1) . doi: 10.3847/0004-637X/827/1/7
• Martinez-Sykora, Juan; De Pontieu, Bart Walter; Carlsson, Mats & Hansteen, Viggo (2016). On the Misalignment between Chromospheric Features and the Magnetic Field on the Sun. Astrophysical Journal Letters.  ISSN 2041-8205.  831(1) . doi: 10.3847/2041-8205/831/1/L1
• Martinez-Sykora, Juan; De Pontieu, Bart Walter; Hansteen, Viggo & Gudiksen, Boris Vilhelm (2016). TIME DEPENDENT NONEQUILIBRIUM IONIZATION of TRANSITION REGION LINES OBSERVED with IRIS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  817(1) . doi: 10.3847/0004-637X/817/1/46 Full text in Research Archive.
• Mykland Hilde, Janne; Skjørten, Ingunn; Hansteen, Viggo; Melsom, Morten Nissen; Atar, Dan; Hisdal, Jonny; Hummerfeldt, Sjur & Steine, Kjetil (2016). Assessment of right ventricular afterload in COPD. COPD: Journal of Chronic Obstructive Pulmonary Disease.  ISSN 1541-2555.  13(2), s 176- 185 . doi: 10.3109/15412555.2015.1057275
• Ortiz, Ada; Hansteen, Viggo; Bellot Rubio, L. R.; de la Cruz Rodriguez, Jaime; De Pontieu, Bart Walter; Carlsson, Mats & Rouppe, Van Der Voort Luc (2016). Emergence of Granular-Sized Magnetic Bubbles through the Solar Atmosphere. III. The Path to the Transition Region. Astrophysical Journal (ApJ).  ISSN 0004-637X.  825(2) . doi: 10.3847/0004-637X/825/2/93 Full text in Research Archive.
• Testa, Paola; De Pontieu, Bart Walter & Hansteen, Viggo (2016). High Spatial Resolution Fe XII Observations of Solar Active Regions. Astrophysical Journal (ApJ).  ISSN 0004-637X.  827(2) . doi: 10.3847/0004-637X/827/2/99
• Cheung, Mark C. M.; De Pontieu, Bart Walter; Tarbell, Theodore D.; Fu, Y.; Tian, H.; Testa, Paola; Reeves, K. K.; Martinez-Sykora, Juan; Boerner, P.; Wulser, J. P.; Lemen, J.; Title, Alan M.; Hurlburt, N.; Kleint, L.; Kankelborg, C.; Jaeggli, S.; Golub, L.; McKillop, S.; Saar, S.; Carlsson, Mats & Hansteen, Viggo (2015). Homologous helical jets: Observations by IRIS, SDO, and Hinode and magnetic modeling with data-driven simulations. Astrophysical Journal (ApJ).  ISSN 0004-637X.  801(2) . doi: 10.1088/0004-637X/801/2/83 Full text in Research Archive.
• de la Cruz Rodriguez, Jaime; Hansteen, Viggo; Bellot-Rubio, Luis & Ortiz, Ada (2015). EMERGENCE of GRANULAR-SIZED MAGNETIC BUBBLES THROUGH the SOLAR ATMOSPHERE. II. NON-LTE CHROMOSPHERIC DIAGNOSTICS and INVERSIONS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  810(2) . doi: 10.1088/0004-637X/810/2/145 Full text in Research Archive.
• Guerreiro, Nuno Miguel Rodrigues; Haberreiter, M.; Hansteen, Viggo & Schmutz, W (2015). Small-scale Heating Events in the Solar Atmosphere. I. Identification, Selection, and Implications for Coronal Heating. Astrophysical Journal (ApJ).  ISSN 0004-637X.  813(1) . doi: 10.1088/0004-637X/813/1/61 Full text in Research Archive.
• Hansteen, Viggo; Carlsson, Mats & Gudiksen, Boris Vilhelm (2015). IRIS observations and 3D `realistic' MHD models of the solar chromosphere, In A. J. Cenarro; F. Figueras; C. Hernández-Monteagudo; J. Trujillo Bueno & L. Valdivielso (ed.),  Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society (SEA) held in Teruel, September 8-12, 2014.  Sociedad Española de Astronomía.  ISBN 978-84-606-8760-3.  Kapittel.  s 19 - 28
• Hansteen, Viggo; Carlsson, Mats & Gudiksen, Boris Vilhelm (2015). Numerical Modeling of the Solar Chromosphere and Corona: What Has Been Done? What Should Be Done?. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  498, s 141- 146
• Hansteen, Viggo; Guerreiro, Nuno Miguel Rodrigues; De Pontieu, Bart Walter & Carlsson, Mats (2015). NUMERICAL SIMULATIONS of CORONAL HEATING THROUGH FOOTPOINT BRAIDING. Astrophysical Journal (ApJ).  ISSN 0004-637X.  811(2) . doi: 10.1088/0004-637X/811/2/106 Full text in Research Archive.
• Martinez-Sykora, Juan; De Pontieu, Bart Walter; Hansteen, Viggo & Carlsson, Mats (2015). The role of partial ionization effects in the chromosphere. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.  ISSN 1364-503X.  373(2042) . doi: 10.1098/rsta.2014.0268
• Martinez-Sykora, Juan; Rouppe, Van Der Voort Luc; Carlsson, Mats; De Pontieu, Bart Walter; Mendes Domingos Pereira, Tiago; Boerner, P.; Hurlburt, N.; Kleint, Lucia; Lemen, J.; Tarbell, Ted D.; Title, A.; Wüelser, Jean Pierre; Hansteen, Viggo; Golub, Leon; McKillop, S.; Reeves, K. K.; Saar, S.; Testa, Paola; Tian, Hui; Jaeggli, S. & Kankelborg, C. (2015). Internetwork Chromospheric Bright Grains Observed with IRIS and SST. Astrophysical Journal (ApJ).  ISSN 0004-637X.  803(1) . doi: 10.1088/0004-637X/803/1/44 Full text in Research Archive.
• Mendes Domingos Pereira, Tiago; Carlsson, Mats; De Pontieu, Bart Walter & Hansteen, Viggo (2015). THE FORMATION of IRIS DIAGNOSTICS. IV. the Mg ii TRIPLET LINES AS A NEW DIAGNOSTIC FOR LOWER CHROMOSPHERIC HEATING. Astrophysical Journal (ApJ).  ISSN 0004-637X.  806(1) . doi: 10.1088/0004-637X/806/1/14 Full text in Research Archive.
• Olluri, Kosovare; Gudiksen, Boris Vilhelm; Hansteen, Viggo & De Pontieu, Bart Walter (2015). Synthesized spectra of optically thin emission lines produced by the Bifrost stellar atmosphere code, including nonequilibrium ionization effects: A study of the intensity, nonthermal line widths, and Doppler shifts. Astrophysical Journal (ApJ).  ISSN 0004-637X.  802(1) . doi: 10.1088/0004-637X/802/1/5 Full text in Research Archive.
• Rouppe, Van Der Voort Luc; De Pontieu, Bart Walter; Mendes Domingos Pereira, Tiago; Carlsson, Mats & Hansteen, Viggo (2015). Heating signatures in the disk counterparts of solar spicules in interface region imaging spectrograph observations. Astrophysical Journal Letters.  ISSN 2041-8205.  799(1) . doi: 10.1088/2041-8205/799/1/L3 Full text in Research Archive.
• De Pontieu, Bart Walter; Title, A. M.; Lemen, J. R.; Kushner, G. D.; Akin, D. J.; Allard, B.; Berger, Thomas; Boerner, P.; Cheung, M; Chou, C; Drake, J. F.; Duncan, D. W.; Freeland, S.; Heyman, G. F.; Hoffman, C.; Hurlburt, N. E.; Lindgren, R. W.; Mathur, D.; Rehse, R.; Sabolish, D.; Seguin, R.; Schrijver, C. J.; Tarbell, T.D.; Wülser, J.-P.; Wolfson, C. J.; Yanari, C.; Mudge, J.; Nguyen-Phuc, N.; Timmons, R.; van Bezooijen, R.; Weingrod, I.; Brookner, R.; Butcher, G.; Dougherty, B.; Eder, J.; Knagenhjelm, V.; Larsen, S.; Mansir, D.; Phan, L.; Boyle, P.; Cheimets, P. N.; DeLuca, E.E.; Golub, L.; Gates, R.; Hertz, E.; McKillop, S.; Park, S.; Perry, T.; Podgorski, W. A.; Reeves, K.; Saar, S.; Testa, Paola; Tian, Hui; Weber, M.; Dunn, C.; Eccles, S.; Jaeggli, S. A.; Kankelborg, C. C.; Mashburn, K.; Pust, N.; Springer, L.; Carvalho, R.; Kleint, L.; Marmie, J.; Mazmanian, E.; Pereira, Tiago Mendes Domingos; Sawyer, S.; Strong, J.; Worden, S. P.; Carlsson, Mats; Hansteen, Viggo; Leenaarts, Jorrit; Wiesmann, Martin; Aloise, J.; Chu, K.-C.; Bush, R. I.; Scherrer, P. H.; Brekke, Pål; Martinez-Sykora, J.; Lites, B.W.; McIntosh, S.W.; Uitenbroek, H.; Okamoto, T. J.; Gummin, M. A.; Auker, G.; Jerram, P.; Pool, P. & Waltham, N. (2014). The Interface Region Imaging Spectrograph (IRIS). Solar Physics.  ISSN 0038-0938.  289(7), s 2733- 2779 . doi: 10.1007/s11207-014-0485-y
• Kleint, L.; Antolin, Patrick; Tian, H; Judge, Philip G.; Testa, Paola; De Pontieu, Bart Walter; Martinez-Sykora, Juan; Reeves, K. K.; Wuelser, J. P.; McKillop, S.; Saar, S.; Carlsson, Mats; Boerner, P.; Hurlburt, N.; Lemen, J.; Tarbell, T.D.; Title, A.; Golub, L.; Hansteen, Viggo; Jaeggli, S. & Kankelborg, C. (2014). Detection of supersonic downflows and associated heating events in the transition region above sunspots. Astrophysical Journal Letters.  ISSN 2041-8205.  789(2) . doi: 10.1088/2041-8205/789/2/L42 Full text in Research Archive.
• Tian, H; DeLuca, E.; Reeves, K. K.; McKillop, S.; De Pontieu, Bart Walter; Martinez-Sykora, Juan; Carlsson, Mats; Hansteen, Viggo; Kleint, L.; Cheung, M; Golub, L.; Saar, S.; Testa, Paola; Weber, M.; Lemen, J.; Title, A.; Boerner, P.; Hurlburt, N.; Tarbell, T.D.; Wuelser, J. P.; Kankelborg, C.; Jaeggli, S. & McIntosh, S.W. (2014). HIGH-RESOLUTION OBSERVATIONS OF THE SHOCK WAVE BEHAVIOR FOR SUNSPOT OSCILLATIONS WITH THE INTERFACE REGION IMAGING SPECTROGRAPH. Astrophysical Journal (ApJ).  ISSN 0004-637X.  786(2) . doi: 10.1088/0004-637X/786/2/137 Full text in Research Archive.
• Archontis, Vasilis & Hansteen, Viggo (2014). CLUSTERS OF SMALL ERUPTIVE FLARES PRODUCED BY MAGNETIC RECONNECTION IN THE SUN. Astrophysical Journal Letters.  ISSN 2041-8205.  788(1) . doi: 10.1088/2041-8205/788/1/L2 Full text in Research Archive.
• De Pontieu, Bart Walter; Rouppe, Van Der Voort Luc; McIntosh, S.W.; Pereira, Tiago Mendes Domingos; Carlsson, Mats; Hansteen, Viggo; Skogsrud, Håkon; Lemen, J.; Title, A.; Boerner, P.; Hurlburt, N.; Tarbell, T.D.; Wuelser, J. P.; De Luca, E. E.; Golub, L.; McKillop, S.; Reeves, K.; Saar, S.; Testa, Paola; Tian, H.; Kankelborg, C.; Jaeggli, S.; Kleint, L. & Martinez-Sykora, Juan (2014). On the prevalence of small-scale twist in the solar chromosphere and transition region. Science.  ISSN 0036-8075.  346(6207) . doi: 10.1126/science.1255732
• Hansteen, Viggo; De Pontieu, Bart Walter; Carlsson, Mats; Lemen, James R.; Title, Alan M.; Boerner, Paul F.X.; Hurlburt, Neal E.; Tarbell, Theodore D.; Wüelser, Jean Pierre; Pereira, Tiago Mendes Domingos; De Luca, Edward E.; Golub, Leon; McKillop, Sean C.; Reeves, Katharine K.; Saar, Steven H.; Testa, Paola; Tian, Hui; Kankelborg, Charles C.; Jaeggli, Sarah A.; Kleint, Lucia & Martinez-Sykora, Juan (2014). The unresolved fine structure resolved: IRIS observations of the solar transition region. Science.  ISSN 0036-8075.  346(6207) . doi: 10.1126/science.1255757
• Ortiz, Ada; Bellot Rubio, L. R.; Hansteen, Viggo; de la Cruz Rodriguez, Jaime & Rouppe, Van Der Voort Luc (2014). EMERGENCE OF GRANULAR-SIZED MAGNETIC BUBBLES THROUGH THE SOLAR ATMOSPHERE. I. SPECTROPOLARIMETRIC OBSERVATIONS AND SIMULATIONS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  781(2) . doi: 10.1088/0004-637X/781/2/126 Full text in Research Archive.
• Pereira, Tiago Mendes Domingos; De Pontieu, Bart Walter; Carlsson, Mats; Hansteen, Viggo; Tarbell, T.D.; Lemen, J.; Title, A.; Boerner, P.; Hurlburt, N.; Wulser, J. P.; Martinez-Sykora, Juan; Kleint, L.; Golub, L.; McKillop, S.; Reeves, K. K.; Saar, S.; Testa, Paola; Tian, H; Jaeggli, S. & Kankelborg, C. (2014). An interface region imaging spectrograph first view on solar spicules. Astrophysical Journal Letters.  ISSN 2041-8205.  792(1) . doi: 10.1088/2041-8205/792/1/L15 Full text in Research Archive.
• Peter, H.; Tian, H.; Curdt, W.; Schmit, D.; Innes, D.; De Pontieu, Bart Walter; Lemen, J.; Title, A.; Boerner, P.; Hurlburt, N.; Tarbell, T.D.; Wuelser, J. P.; Martinez-Sykora, Juan; Kleint, L.; Golub, L.; McKillop, S.; Reeves, K. K.; Saar, S.; Testa, Paola; Kankelborg, C.; Jaeggli, S.; Carlsson, Mats & Hansteen, Viggo (2014). Hot explosions in the cool atmosphere of the Sun. Science.  ISSN 0036-8075.  346(6207) . doi: 10.1126/science.1255726
• Testa, Paola; De Pontieu, Bart Walter; Allred, J.; Carlsson, Mats; Reale, F.; Daw, A.; Hansteen, Viggo; Martinez-Sykora, Juan; Liu, W.; DeLuca, E.E.; Golub, L.; McKillop, S.; Reeves, K.; Saar, S.; Tian, H.; Lemen, J.; Title, A.; Boerner, P.; Hurlburt, N.; Tarbell, T.D.; Wuelser, J. P.; Kleint, L.; Kankelborg, C. & Jaeggli, S. (2014). Evidence of nonthermal particles in coronal loops heated impulsively by nanoflares. Science.  ISSN 0036-8075.  346(6207) . doi: 10.1126/science.1255724
• Tian, H.; DeLuca, E.E.; Cranmer, S.R.; De Pontieu, Bart Walter; Peter, H.; Martinez-Sykora, Juan; Golub, L.; McKillop, S.; Reeves, K. K.; Miralles, M. P.; McCauley, P.; Saar, S.; Testa, Paola; Weber, M.; Murphy, N.; Lemen, J.; Title, A.; Boerner, P.; Hurlburt, N.; Tarbell, T.D.; Wuelser, J. P.; Kleint, L.; Kankelborg, C.; Jaeggli, S.; Carlsson, Mats; Hansteen, Viggo & McIntosh, S.W. (2014). Prevalence of small-scale jets from the networks of the solar transition region and chromosphere. Science.  ISSN 0036-8075.  346(6207) . doi: 10.1126/science.1255711
• Martinez-Sykora, Juan; De Pontieu, Bart Walter; Leenaarts, Jorrit; Pereira, Tiago Mendes Domingos; Carlsson, Mats; Hansteen, Viggo; Stern, J. V.; Tian, H; McIntosh, S.W. & Rouppe, Van Der Voort Luc (2013). A DETAILED COMPARISON BETWEEN THE OBSERVED AND SYNTHESIZED PROPERTIES OF A SIMULATED TYPE II SPICULE. Astrophysical Journal (ApJ).  ISSN 0004-637X.  771(1) . doi: 10.1088/0004-637X/771/1/66 Full text in Research Archive.
• Winebarger, A. R.; Walsh, R. W.; Moore, R; De Pontieu, Bart Walter; Hansteen, Viggo; Cirtain, J.; Golub, L.; Kobayashi, K.; Korreck, K.; DeForest, C.; Weber, M.; Title, A. & Kuzin, S. (2013). DETECTING NANOFLARE HEATING EVENTS IN SUBARCSECOND INTER-MOSS LOOPS USING Hi-C. Astrophysical Journal (ApJ).  ISSN 0004-637X.  771(1) . doi: 10.1088/0004-637X/771/1/21
• Guerreiro, Nuno Miguel Rodrigues; Carlsson, Mats & Hansteen, Viggo (2013). NUMERICAL SIMULATIONS OF SPICULE ACCELERATION. Astrophysical Journal (ApJ).  ISSN 0004-637X.  766(2) . doi: 10.1088/0004-637X/766/2/128 Full text in Research Archive.
• Guerreiro, Nuno Miguel Rodrigues; Hansteen, Viggo & De Pontieu, Bart (2013). THE CYCLING OF MATERIAL BETWEEN THE SOLAR CORONA AND CHROMOSPHERE. Astrophysical Journal (ApJ).  ISSN 0004-637X.  769(1) . doi: 10.1088/0004-637X/769/1/47 Full text in Research Archive.
• Hilde, Janne Mykland; skjørten, i; Grøtta, Ole Jørgen; Hansteen, Viggo; Melsom, Morten Nissen; Hisdal, J; Hummerfelt, S. & Steine, Kjetil (2013). Right ventricular dysfunction and remodelling in chronic obstructive pulmonary disease without pulmonary hypertension. Journal of the American College of Cardiology.  ISSN 0735-1097.  17, s 1103
• Mykland Hilde, Janne; Skjørten, Ingunn; Hansteen, Viggo; Melsom, Morten Nissen; Hisdal, Jonny; Hummerfeldt, Sjur & Steine, Kjetil (2013). Haemodynamic responses to exercise in patients with CORD. European Respiratory Journal.  ISSN 0903-1936.  41(5), s 1031- 1041 . doi: 10.1183/09031936.00085612
• Olluri, Kosovare; Gudiksen, Boris Vilhelm & Hansteen, Viggo (2013). NON-EQUILIBRIUM IONIZATION EFFECTS ON THE DENSITY LINE RATIO DIAGNOSTICS OF O IV. Astrophysical Journal (ApJ).  ISSN 0004-637X.  767(1) . doi: 10.1088/0004-637X/767/1/43
• Olluri, Kosovare; Gudiksen, Boris Vilhelm & Hansteen, Viggo (2013). NON-EQUILIBRIUM IONIZATION IN THE BIFROST STELLAR ATMOSPHERE CODE. Astronomical Journal.  ISSN 0004-6256.  145(3) . doi: 10.1088/0004-6256/145/3/72
• Skjørten, Ingunn; Hilde, Janne Mykland; Melsom, Morten Nissen; Hansteen, Viggo; Steine, Kjetil & Hummerfelt, S (2013). pulmonary artery pressure and Pa=2 in chronic obstructive pulmonary disease. Respiratory Medicine.  ISSN 0954-6111.  107, s 1271- 1279
• Skjørten, Ingunn; Mykland Hilde, Janne; Melsom, Morten Nissen; Hansteen, Viggo; Steine, Kjetil & Hummerfeldt, Sjur (2013). Pulmonary artery pressure and PaO2 in chronic obstructive pulmonary disease. Respiratory Medicine.  ISSN 0954-6111.  107(8), s 1271- 1279 . doi: 10.1016/j.rmed.2013.03.021
• Testa, Paola; De Pontieu, Bart; Martinez-Sykora, Juan; DeLuca, E.; Hansteen, Viggo; Cirtain, J.; Winebarger, A.; Golub, L.; Kobayashi, K.; Korreck, K.; Kuzin, S.; Walsh, R.; DeForest, C.; Title, A. & Weber, Mark (2013). OBSERVING CORONAL NANOFLARES IN ACTIVE REGION MOSS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  770(1) . doi: 10.1088/2041-8205/770/1/L1
• Antolin, Patrick; Shibata, K.; Carlsson, Mats; Rouppe, Van Der Voort Luc; Vissers, Gregal Joan Maria & Hansteen, Viggo (2012). Implications for Coronal Heating from Coronal Rain. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  454, s 171- 174
• De Pontieu, Bart; Carlsson, Mats; Rouppe, Van Der Voort Luc; Rutten, Robert; Hansteen, Viggo & Watanabe, H. (2012). UBIQUITOUS TORSIONAL MOTIONS IN TYPE II SPICULES. Astrophysical Journal (ApJ).  ISSN 0004-637X.  752(1) . doi: 10.1088/2041-8205/752/1/L12

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• Hansteen, Viggo (2019). EBs and UV-bursts: reconnection at different heights in the solar atmosphere.
• Hansteen, Viggo (2019). Ellerman Bombs and UV bursts - observations.
• Hansteen, Viggo (2019). Ellerman Bombs and UV bursts, numerical simulations and IRIS observations.
• Hansteen, Viggo (2019). Ellerman Bombs and UV bursts, reconnection at different heights in the chromosphere?.
• Hansteen, Viggo (2019). Ellerman Bombs and UV-bursts, a result of flux emergence.
• Hansteen, Viggo (2019). Ellerman bombs and UV bursts in the solar chromosphere.
• Hansteen, Viggo (2019). The FIP effect in the Chromosphere, Transition Region, Corona, and Solar Wind.
• Kohutova, Petra; Antolin, Patrick; Popovas, Andrius; Szydlarski, Mikolaj Marcin & Hansteen, Viggo (2019). 3D radiative MHD simulations of coronal rain formation and evolution.
• Hansteen, Viggo (2018). Chromospheric Dynamics and Heating Processes Ion-Neutral Effects in the Solar Chromosphere and Type II Spicules.
• Hansteen, Viggo (2018). Ellerman bombs and UV bursts: reconnection at different atmospheric layers?.
• Hansteen, Viggo (2018). Ellerman bombs and UV bursts: reconnection at different atmospheric layers?.
• Hansteen, Viggo (2018). Ion neutral effects in the solar chromosphere and type II spicules.
• Hansteen, Viggo (2018). Mass and energy flows between the solar chromosphere, transition region and corona.
• Hansteen, Viggo (2018). Modeling chromospheric heating and dynamics: What do we understand?.
• Hansteen, Viggo (2018). The Heating of the Solar Chromosphere and Corona, What can "realistic" 3D Numerical Models teach us?.
• Carlsson, Mats & Hansteen, Viggo (2015). Vær og uvær på sola.
• Mendes Domingos Pereira, Tiago; Carlsson, Mats; De Pontieu, Bart Walter & Hansteen, Viggo (2015). The Mg II lines as a diagnostic for heating in the lower chromosphere.
• Hansteen, Viggo (2014). Energy transport in the transition region and lower solar corona.
• Hansteen, Viggo (2014). Heating of the upper chromosphere, transition region and corona.
• Hansteen, Viggo (2014). IRIS Observations of transition region 'unresolved fine structure'.
• Hansteen, Viggo (2014). IRIS observations and 'realistic' 3D models of the solar chromosphere.
• Hansteen, Viggo (2014). Numerical modeling of the chromosphere and corona; what has been done? what should be done?.
• Hansteen, Viggo (2014). Numerical modeling of the outer solar atmosphere, with some examples from IRIS observations.
• Hansteen, Viggo (2014). Numerical modeling of the solar chromosphere and corona; what has been done? what should be done?.
• Hansteen, Viggo (2014). 'Realistic' 3D simulations of a small flare resulting from flux emergence.
• Hansteen, Viggo (2014). Simulating the transition region and corona: magnetic heating of the outer solar atmosphere.
• Kato, Yoshiaki; De Pontieu, Bart Walter; Martinez-Sykora, J.; Hansteen, Viggo; Pereira, Tiago Mendes Domingos; Leenaarts, Jorritt & Carlsson, Mats (2014). Measuring energy flux of magneto-acoustic wave in the magnetic elements by using IRIS. Show summary

  NASA's Interface Region Imaging Spectrograph (IRIS) has opened a new window to explore the chromospheric/coronal waves that potentially energize the solar atmosphere. By using an imaging spectrograph covering the Si IV and Mg II h&k lines as well as a slit-jaw imager centered at Si IV and Mg II k onboard IRIS, we can determine the nature of propagating magneto-acoustic waves just below and in the transition region. In this study, we compute the vertically emergent intensity of the Si IV and Mg II h&k lines from a time series of snapshots of a magnetic element in a two-dimensional Radiative MHD simulation from the Bifrost code. We investigate the synthetic line profiles to detect the slow magneto-acoustic body wave (slow mode) which becomes a slow shock at the lower chromosphere in the magnetic element. We find that the Doppler shift of the line core gives the velocity amplitude of the longitudinal magneto-acoustic body wave. The contribution function of the line core indicates that the formation of Mg II h&k lines is associated with the propagating shocks and therefore the time evolution of the line core intensity represents the propagating shocks projected on the optical surface. We will report on measurement of the energy flux of slow modes in the magnetic elements by using IRIS observations.

• Kato, Yoshiaki; Steiner, Oskar; Hansteen, Viggo; Carlsson, Mats & Gudiksen, Boris Vilhelm (2014). Chromospheric and Corona Wave Generation in Flux Tubes.
• Carlsson, Mats; Hansteen, Viggo; Pereira, Tiago Mendes Domingos; Leenaarts, Jorrit; Gudiksen, Boris Vilhelm & De Pontieu, Bart Walter (2013). First Comparison between IRIS Data and Numerical Models.
• Hansteen, Viggo; Carlsson, Mats & De Pontieu, Bart Walter (2013). IRIS observations of transition region 'unresolved fine structure'.
• Carlsson, Mats & Hansteen, Viggo (2013). Hva er nytt på sola?.
• Carlsson, Mats & Hansteen, Viggo (2013). Public release of Bifrost simulations.
• Hansteen, Viggo (2013). A detailed comparison between the observed and synthesized properties of a type II spicule.
• Hansteen, Viggo (2013). Modeling of the energetics and dynamics of the outer solar atmosphere.
• Hansteen, Viggo (2013). Numerical simulations - supporting design of facilities and interpretations.
• Hansteen, Viggo (2013). Physics of the solar chromosphere and corona: Dynamics and energetics.
• Hilde, J.M.; Hisdal, Jonny; Melsom, Morten Nissen; Hansteen, Viggo; Seljeflot, Ingebjørg; Arnesen, Harald & Steine, Kjetil (2013). Reduced systemic arterial compliance and subclinical LV systolic dysfunction in COPD. European Heart Journal.  ISSN 0195-668X.  34, s 296- 296

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