Juan Martinez Sykora

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Email j.m.sykora@astro.uio.no
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Visiting address Sem Sælands vei 13 Svein Rosselands hus 0371 OSLO
Postal address Postboks 1029 0315 OSLO
Tags: Solar Physics

Publications

  • 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
  • Nóbrega Siverio, Daniel Elias; Martinez-Sykora, Juan; Moreno-Insertis, Fernando & Carlsson, Mats (2020). Ambipolar diffusion in the Bifrost code. Astronomy and Astrophysics.  ISSN 0004-6361.  638 . doi: 10.1051/0004-6361/202037809
  • Nóbrega Siverio, Daniel Elias; Moreno-Insertis, Fernando; Martinez-Sykora, Juan; Carlsson, Mats & Szydlarski, Mikolaj Marcin (2020). Nonequilibrium ionization and ambipolar diffusion in solar magnetic flux emergence processes. Astronomy and Astrophysics.  ISSN 0004-6361.  633 . doi: 10.1051/0004-6361/201936944 Full text in Research Archive.
  • 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.
  • 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.
  • Chintzoglou, G.; De Pontieu, Bart Walter; Martinez-Sykora, Juan; Mendes Domingos Pereira, Tiago; Vourlidas, A. & Beltran, Samuel Tun (2018). Bridging the gap: Capturing the Lyα Counterpart of a Type-II Spicule and its Heating Evolution with VAULT2.0 and IRIS Observations. Astrophysical Journal (ApJ).  ISSN 0004-637X.  857(1) . doi: 10.3847/1538-4357/aab607 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.
  • 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.
  • De Pontieu, Bart Walter; De Moortel, I.; Martinez-Sykora, Juan & McIntosh, S. W. (2017). Observations and Numerical Models of Solar Coronal Heating Associated with Spicules. Astrophysical Journal Letters.  ISSN 2041-8205.  845(2) . doi: 10.3847/2041-8213/aa7fb4 Full text in Research Archive.
  • De Pontieu, Bart Walter; Martinez-Sykora, Juan & Chintzoglou, Georgios (2017). What Causes the High Apparent Speeds in Chromospheric and Transition Region Spicules on the Sun?. Astrophysical Journal Letters.  ISSN 2041-8205.  849(1) . doi: 10.3847/2041-8213/aa9272 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.
  • Nobrega-Siverio, Daniel; Martinez-Sykora, Juan; Moreno-Insertis, F. & Rouppe van der Voort, Luc (2017). Surges and Si IV Bursts in the Solar Atmosphere: Understanding IRIS and SST Observations through RMHD Experiments. Astrophysical Journal (ApJ).  ISSN 0004-637X.  850(2) . doi: 10.3847/1538-4357/aa956c Full text in Research Archive.
  • 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.
  • 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 Pontieu, Bart Walter; McIntosh, Scott; Martinez-Sykora, Juan; Peter, Hardi & Mendes Domingos Pereira, Tiago (2015). Why is non-thermal line broadening of spectral lines in the lower transition region of the sun independent of spatial resolution?. Astrophysical Journal Letters.  ISSN 2041-8205.  799(1) . doi: 10.1088/2041-8205/799/1/L12 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.
  • 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.
  • 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
  • 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.
  • 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
  • Dalda, A. S.; Martinez-Sykora, Juan; Bellot Rubio, L. R. & Title, A. (2012). STUDY OF SINGLE-LOBED CIRCULAR POLARIZATION PROFILES IN THE QUIET SUN. Astrophysical Journal (ApJ).  ISSN 0004-637X.  748(1) . doi: 10.1088/0004-637X/748/1/38
  • Martinez-Sykora, Juan (2012). Two Types of Spicules “Observed” in 3D Realistic Models. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  454, s 133- 136
  • Martinez-Sykora, Juan; De Pontieu, Bart & Hansteen, Viggo (2012). TWO-DIMENSIONAL RADIATIVE MAGNETOHYDRODYNAMIC SIMULATIONS OF THE IMPORTANCE OF PARTIAL IONIZATION IN THE CHROMOSPHERE. Astrophysical Journal (ApJ).  ISSN 0004-637X.  753(2) . doi: 10.1088/0004-637X/753/2/161
  • Testa, Paola; De Pontieu, Bart; Martinez-Sykora, Juan; Hansteen, Viggo & Carlsson, Mats (2012). INVESTIGATING THE RELIABILITY OF CORONAL EMISSION MEASURE DISTRIBUTION DIAGNOSTICS USING THREE-DIMENSIONAL RADIATIVE MAGNETOHYDRODYNAMIC SIMULATIONS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  758(1) . doi: 10.1088/0004-637X/758/1/54
  • De Pontieu, Bart; McIntosh, S.W.; Carlsson, Mats; Hansteen, Viggo; Tarbell, T.D.; Boerner, P.; Martinez-Sykora, Juan; Schrijver, C. J. & Title, A. M. (2011). The Origins of Hot Plasma in the Solar Corona. Science.  ISSN 0036-8075.  331(6013), s 55- 58 . doi: 10.1126/science.1197738
  • Gudiksen, Boris Vilhelm; Carlsson, Mats; Hayek, Wolfgang; Hansteen, Viggo; Leenaarts, Jorrit & Martinez-Sykora, Juan (2011). The stellar atmosphere simulation code Bifrost. Code description and validation. Astronomy and Astrophysics.  ISSN 0004-6361.  531 . doi: 10.1051/0004-6361/201116520
  • Martinez-Sykora, Juan; De Pontieu, Bart; Hansteen, Viggo & McIntosh, Scott (2011). WHAT DO SPECTRAL LINE PROFILE ASYMMETRIES TELL US ABOUT THE SOLAR ATMOSPHERE?. Astrophysical Journal (ApJ).  ISSN 0004-637X.  732(2) . doi: 10.1088/0004-637X/732/2/84
  • Martinez-Sykora, Juan; De Pontieu, Bart; Testa, Paola & Hansteen, Viggo (2011). FORWARD MODELING OF EMISSION IN SOLAR DYNAMICS OBSERVATORY/ATMOSPHERIC IMAGING ASSEMBLY PASSBANDS FROM DYNAMIC THREE-DIMENSIONAL SIMULATIONS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  743(1) . doi: 10.1088/0004-637X/743/1/23
  • Martinez-Sykora, Juan; Hansteen, Viggo & Moreno-Insertis, F. (2011). ON THE ORIGIN OF THE TYPE II SPICULES: DYNAMIC THREE-DIMENSIONAL MHD SIMULATIONS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  736(1) . doi: 10.1088/0004-637X/736/1/9
  • Tian, H; McIntosh, S.W.; De Pontieu, Bart; Martinez-Sykora, Juan; Sechler, M. & Wang, X. (2011). TWO COMPONENTS OF THE SOLAR CORONAL EMISSION REVEALED BY EXTREME-ULTRAVIOLET SPECTROSCOPIC OBSERVATIONS. Astrophysical Journal (ApJ).  ISSN 0004-637X.  738(1) . doi: 10.1088/0004-637X/738/1/18
  • Sykora, Juan Martinez; Hansteen, Viggo & Carlsson, Mats (2009). TWISTED FLUX TUBE EMERGENCE FROM THE CONVECTION ZONE TO THE CORONA. II. LATER STATES. Astrophysical Journal.  ISSN 0004-637X.  702(1), s 129- 140 . doi: 10.1088/0004-637X/702/1/129
  • Sykora, Juan Martinez; Hansteen, Viggo; De Pontieu, Bart & Carlsson, Mats (2009). SPICULE-LIKE STRUCTURES OBSERVED IN THREE-DIMENSIONAL REALISTIC MAGNETOHYDRODYNAMIC SIMULATIONS. Astrophysical Journal.  ISSN 0004-637X.  701(2), s 1569- 1581 . doi: 10.1088/0004-637X/701/2/1569

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  • Martinez-Sykora, Juan (2019). Beyond single fluid or two fluids: Multi-component (multi-species) and multi fluid effects in the solar atmosphere.
  • Martinez-Sykora, Juan (2019). Ebysus: Multi-fluid & multi-species numerical code.
  • Martinez-Sykora, Juan (2019). Ebysus: a multi-fluid and multi-species numerical code: on coupling between ionized species.

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Published Jan. 16, 2020 11:29 AM - Last modified May 5, 2020 11:44 AM