Sven Wedemeyer

Image of Sven Wedemeyer
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Phone +47-22856520
Room 210A
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Visiting address Sem Sælands vei 13 Svein Rosselands hus 0371 OSLO
Postal address Postboks 1029 Blindern 0315 OSLO

Primary research fields

Solar and stellar physics with additional interests in extra-solar planets. Most of my individual projects can be summarized as realistic numerical simulations in comparison with space-borne and ground-based observations.


Main current positions and functions

  • Researcher/Lecturer (permanent staff, since 2016)

  • PI of the ERC-funded SolarALMA project (since 2016); I was awarded a Consolidator Grant by the European Research Commission (ERC) for the project "ALMA - The key to the Sun’s coronal heating problem". The SolarALMA project will run until 2021 with a team of 4 (post-doctoral) researchers and 2 PhD students.

  • One of the PIs of the Rosseland Centre for Solar Physics (RoCS, since 2017); a centre of excellence funded by the Research Council of Norway 

  • Member of the European Scientific Advisory Committee (ESAC) for ALMA (ESO, since 2017)

  • Initiator and co-ordinator of the SSALMON research network with more than 80 researchers (since 2014)  


Previous research

After finishing my PhD studies at the University of Kiel, Germany, which includes a stay at the University of Glasgow, UK, I was a post-doctoral research fellow at the Kiepenheuer Institute in Freiburg i.Br., Germany (2003-06). After receiving a Marie Curie Intra-European Fellowship, I started working at the Institute of Theoretical Astrophysics at the University of Oslo. During the recent years, I have been the PI of the MDWARF project and the VORTEX project, both funded by the Research Council of Norway. 

Recent research highlights include the discovery and explanation of so-called magnetic tornadoes on the Sun, featured on the front page of Nature in 2012, and the ongoing development of methods for observing the Sun with the Atacama Large Millimeter/submillimeter Array, an application with potentially high impact for our understanding of the outer layers of our Sun and other stars.

Please refer to my detailed personal homepage (http://folk.uio.no/svenwe/) for more general information and to http://www.solartornado.info/  for more information on my 2012 Nature article ("Magnetic tornadoes as energy channels into the solar corona") and related work.


Current major research activities:

  • "ALMA - Solar Observations with the Atacama Large Millimeter Array
    • The ERC-funded SolarALMA project runs from 2016 to 2021 and aims at utilizing ALMA for detailed studies of the solar chromosphere with particular focus on the coronal heating problem.
    • External staff member of the ALMA Regional Center at Ondrejoy, Czech Republic
    • Co-I of the project "Advanced Solar Observing Techniques" within the North American Study Plan for Development Upgrades of the ALMA (PI: T. Bastian, NRAO, USA)
    • Team member of the project "Solar Research with ALMA" carried out at the Czech node of the European ALMA Regional Center (EU ARC at Ondrejov, Czech Republic) in the frame of the ESO program "Enhancement of ALMA Capabilities/EoC" (PI: R. Brajsa, Hvar Observatory, Croatia).
    • Coordinator of SSALMON - The Solar Simulations for the Atacama Large Millimeter Observatory Network, which was officially launched on September 1st, 2014.


Current minor research activities:

  • Member of KOINet - Observations of extrasolar planets (Kepler Objects of Interest), amongst others with the Nordic Optical Telescope (since 2014)

Previous major research activities (in part ongoing):


Tags: Astronomy and Astrophysics, Solar Physics, Observations, Simulations, Computational Astrophysics, Solar Chromosphere, Stars, Extrasolar Planets, Atacama Large Millimeter/submillimeter Array (ALMA), Nordic Optical Telescope

Publications

  • Kato, Yoshiaki & Wedemeyer, Sven (2017). Vortex flows in the solar chromosphere: I. Automatic detection method. Astronomy and Astrophysics.  ISSN 0004-6361.  601 . doi: 10.1051/0004-6361/201630082
  • Shimojo, M.; Bastian, T. S.; Hales, A. S.; White, S. M.; Iwai, K.; Hills, R. E.; Hirota, A.; Phillips, N. M.; Sawada, T.; Yagoubov, P.; Siringo, G.; Asayama, S.; Sugimoto, M.; Brajša, Roman; Skokic, I.; Barta, M.; Kim, S.; de Gregorio-Monsalvo, I.; Corder, S. A.; Hudson, H. S.; Wedemeyer, Sven; Gary, D. E.; De Pontieu, Bart Walter; Loukitcheva, M.; Fleishman, G. D.; Chen, B.; Kobelski, A. & Yan, Y. (2017). Observing the Sun with the Atacama Large Millimeter/submillimeter Array (ALMA): High-Resolution Interferometric Imaging. Solar Physics.  ISSN 0038-0938.  292(7) . doi: 10.1007/s11207-017-1095-2
  • Wedemeyer, Sven; Kučinskas, Arūnas; Klevas, Jonas & Ludwig, Hans-Günter (2017). Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars: VI. First chromosphere model of a late-type giant. Astronomy and Astrophysics.  ISSN 0004-6361.  606 . doi: 10.1051/0004-6361/201730405
  • White, S. M.; Iwai, K.; Phillips, N. M.; Hills, R. E.; Hirota, A.; Yagoubov, P.; Siringo, G.; Shimojo, M.; Bastian, T. S.; Hales, A. S.; Sawada, T.; Asayama, S.; Sugimoto, M.; Marson, R. G.; Kawasaki, W.; Muller, E.; Nakazato, T.; Sugimoto, K.; Brajša, Roman; Skokic, I.; Barta, M.; Kim, S.; Remijan, A.; de Gregorio, I.; Corder, S. A.; Hudson, H. S.; Loukitcheva, M.; Chen, B.; De Pontieu, Bart Walter; Fleishmann, G. D.; Gary, D. E.; Kobelski, A.; Wedemeyer, Sven & Yan, Y. (2017). Observing the Sun with the Atacama Large Millimeter/submillimeter Array (ALMA): Fast-Scan Single-Dish Mapping. Solar Physics.  ISSN 0038-0938.  292(7) . doi: 10.1007/s11207-017-1123-2
  • Kato, Yoshiaki; Steiner, Oskar; Hansteen, Viggo; Gudiksen, Boris Vilhelm; Wedemeyer, Sven & Carlsson, Mats (2016). Chromospheric and Coronal Wave Generation in a Magnetic Flux Sheath. The Astrophysical Journal.  ISSN 0004-637X.  827(1) . doi: 10.3847/0004-637X/827/1/7
  • Scullion, Eamon; Rouppe, Van Der Voort Luc; Antolin, Patrick; Wedemeyer, Sven; Vissers, Gregal Joan Maria; Kontar, E. P. & Gallagher, P. T. (2016). Observing the Formation of Flare-Driven Coronal Rain. The Astrophysical Journal.  ISSN 0004-637X.  833(2) . doi: 10.3847/1538-4357/833/2/184
  • Wedemeyer, Sven; Bastian, T.; Brajsa, R.; Hudson, H.; Fleishman, G.; Loukitcheva, M.; Fleck, B.; Kontar, Eduard P.; De Pontieu, Bart Walter; Yagoubov, P.; Tiwari, S. K.; Soler, R.; Black, J. H.; Antolin, Patrick; Scullion, Eamon; Gunar, S.; Labrosse, N.; Ludwig, H.-G.; Benz, A. O.; White, S. M.; Hauschildt, P.; Doyle, J. G.; Nakariakov, V. M.; Ayres, T.; Heinzel, P.; Karlicky, M.; Van Doorsselaere, Tom; Gary, D.; Alissandrakis, C. E.; Nindos, A.; Solanki, S. K.; Rouppe, Van Der Voort Luc; Shimojo, M.; Kato, Yoshiaki; Zaqarashvili, T.; Perez, E.; Selhorst, C. L. & Barta, M. (2016). Solar Science with the Atacama Large Millimeter/Submillimeter Array—A New View of Our Sun. Space Science Reviews.  ISSN 0038-6308.  200(1), s 1- 73 . doi: 10.1007/s11214-015-0229-9
  • Wedemeyer, Sven & Ludwig, Hans-Günter (2016). Synthetic activity indicators for M-type dwarf stars. Proceedings of the International Astronomical Union.  ISSN 1743-9213.  11(S320), s 303- 308 . doi: 10.1017/S1743921316000077
  • Phillips, Neil; Hills, Richard; Bastian, Timothy; Hudson, Hugh; Marson, Ralph & Wedemeyer, Sven (2015). Fast single-dish scans of the Sun using ALMA. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  499, s 347- 348
  • Tremblay, P. E.; Fontaine, G.; Freytag, B.; Steiner, O.; Ludwig, Hans-Günter; Steffen, M.; Wedemeyer, Sven & Brassard, P. (2015). ON the EVOLUTION of MAGNETIC WHITE DWARFS. The Astrophysical Journal.  ISSN 0004-637X.  812(1) . doi: 10.1088/0004-637X/812/1/19
  • Wedemeyer, Sven; Bastian, Timothy; Brajša, Roman; Barta, Miroslav; Hudson, Hugh; Fleishman, Gregory; Loukitcheva, Maria; Fleck, Bernhard; Kontar, Eduard P.; De Pontieu, Bart Walter; Tiwari, Sanjew; Kato, Yoshiaki; Soler, Roberto; Yagoubov, Pavel; Black, John; Antolin, Patrick; Gunar, Stanislav; Labrosse, Nicolas; Benz, Arnold; Nindos, Alexander; Steffen, Matthias; Scullion, Eamon Michael; Doyle, Gerry; Zaqarashvili, Teimuraz; Hanslmeier, Arnold; Nakariakov, Valery; Heinzel, Petr; Ayres, Thomas & Karlicky, Marian (2015). SSALMON - The Solar Simulations for the Atacama Large Millimeter Observatory Network. Advances in Space Research.  ISSN 0273-1177.  56(12), s 2679- 2692 . doi: 10.1016/j.asr.2015.05.027
  • Wedemeyer, Sven; Bastian, Timothy; Brajša, Roman; Barta, Miroslav & Shimojo, Masumi (2015). Solar Simulations for the Atacama Large Millimeter Observatory Network. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  499, s 341- 342
  • Wedemeyer, Sven; Bastian, Timothy; Brajša, Roman; Barta, Miroslav; Shimojo, Masumi; Hales, Antonio; Yagoubov, Pavel & Hudson, Hugh (2015). Solar ALMA Observations - A new view of our host star. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  499, s 345- 346
  • Wedemeyer, Sven & Parmer, Asbjørn Lie (2015). ALMA's high-cadence imaging capabilities for solar observations. Astronomical Society of the Pacific Conference Series.  ISSN 1050-3390.  499, s 343- 344
  • Freij, N.; Scullion, Eamon; Nelson, C. J.; Mumford, S.; Wedemeyer-Böhm, Sven & Erdélyi, R. (2014). The detection of upwardly propagating waves channeling energy from the chromosphere to the low corona. The Astrophysical Journal.  ISSN 0004-637X.  791(1) . doi: 10.1088/0004-637X/791/1/61 Full text in Research Archive.
  • Scullion, Eamon; Rouppe, Van Der Voort Luc; Wedemeyer-Böhm, Sven & Antolin, Patrick (2014). Unresolved Fine-Scale Structure in Solar Coronal Loop-Tops. The Astrophysical Journal.  ISSN 0004-637X.  797(1) . doi: 10.1088/0004-637X/797/1/36 Full text in Research Archive.
  • Wedemeyer-Böhm, Sven & Steiner, Oskar (2014). On the plasma flow inside magnetic tornadoes on the Sun. Nippon Tenmon Gakkai obun kenkyu hokoku.  ISSN 0004-6264.  66(1) . doi: 10.1093/pasj/psu086
  • Ayres, T. R.; Lyons, J. R.; Ludwig, Hans-Günter; Caffau, E. & Wedemeyer-Böhm, Sven (2013). IS THE SUN LIGHTER THAN THE EARTH? ISOTOPIC CO IN THE PHOTOSPHERE, VIEWED THROUGH THE LENS OF THREE-DIMENSIONAL SPECTRUM SYNTHESIS. The Astrophysical Journal.  ISSN 0004-637X.  765(1) . doi: 10.1088/0004-637X/765/1/46
  • Ayres, T. R.; Lyons, J. R.; Ludwig, Hans-Günter; Caffau, E. & Wedemeyer-Böhm, Sven (2013). Solar carbon monoxide: poster child for 3D effects. Memorie della Societa Astronomica Italiana Supplement.  ISSN 1824-0178.  24, s 85- 95
  • Wedemeyer-Böhm, Sven (2013). The CO5BOLD analysis tool. Memorie della Societa Astronomica Italiana Supplement.  ISSN 1824-0178.  24, s 96- 99
  • Wedemeyer-Böhm, Sven; Ludwig, Hans-Günter & Steiner, Oskar (2013). Three-dimensional magnetohydrodynamic simulations of M-dwarf chromospheres. Astronomical Notes - Astronomische Nachrichten.  ISSN 0004-6337.  334(1-2), s 137- 140 . doi: 10.1002/asna.201211741
  • Wedemeyer-Böhm, Sven; Scullion, Eamon; Rouppe, Van Der Voort Luc; Bosnjak, Antonija & Antolin, Patrick (2013). Are Giant Tornadoes the Legs of Solar Prominences?. The Astrophysical Journal.  ISSN 0004-637X.  774(2) . doi: 10.1088/0004-637X/774/2/123
  • Wedemeyer-Böhm, Sven; Scullion, Eamon; Steiner, Oskar; de la Cruz Rodriguez, Jaime & Rouppe, Van Der Voort Luc (2013). Magnetic tornadoes and chromospheric swirls - Definition and classification. Journal of Physics, Conference Series.  ISSN 1742-6588.  440(1) . doi: 10.1088/1742-6596/440/1/012005
  • Freytag, Bernd; Steffen, Matthias; Ludwig, Hans-Günter; Wedemeyer-Böhm, Sven; Schaffenberger, Werner & Steiner, Oskar (2012). Simulations of stellar convection with CO5BOLD. Journal of Computational Physics.  ISSN 0021-9991.  231(3), s 919- 959 . doi: 10.1016/j.jcp.2011.09.026
  • Wedemeyer-Böhm, Sven; Scullion, Eamon; Steiner, O.; Rouppe, Van Der Voort Luc; de la Cruz Rodriguez, Jaime; Fedun, V. & Erdélyi, R. (2012). Magnetic tornadoes as energy channels into the solar corona. Nature.  ISSN 0028-0836.  486(7404), s 505- 508 . doi: 10.1038/nature11202
  • Wedemeyer-Böhm, Sven & Carlsson, Mats (2011). Non-equilibrium calcium ionisation in the solar atmosphere. Astronomy and Astrophysics.  ISSN 0004-6361.  528 . doi: 10.1051/0004-6361/201016186
  • Haberreiter, Margit; Finsterle, W; McIntosh, S.W. & Wedemeyer-Böhm, Sven (2010). Toward the analysis of waves in the solar atmosphere based on NLTE spectral synthesis from 3D MHD simulations. MEMORIE della Società Astronomica Italiana.  ISSN 0037-8720.  81, s 782- 785
  • Kjeldseth-Moe, Olav & Wedemeyer-Böhm, Sven (2010). Are there variations in Earth's global mean temperature related to the solar activity?. Proceedings of the International Astronomical Union.  ISSN 1743-9213.  5, s 320- 325 . doi: 10.1017/S1743921309992869
  • Wedemeyer-Böhm, Sven (2010). Small-scale structure and dynamics of the chromospheric magnetic field. MEMORIE della Società Astronomica Italiana.  ISSN 0037-8720.  81, s 693- 700
  • Wöger, Friedrich; Wedemeyer-Böhm, Sven; Uitenbroek, H. & Rimmele, T. R. (2010). Recovering the line-of-sight magnetic field in the chromosphere from Ca II IR spectra. MEMORIE della Società Astronomica Italiana.  ISSN 0037-8720.  81, s 598- 603
  • Wedemeyer-Böhm, Sven; Lagg, Andreas & Nordlund, Åke (2009). Coupling from the Photosphere to the Chromosphere and the Corona. Space Science Reviews.  ISSN 0038-6308.  144(1-4), s 317- 350 . doi: 10.1007/s11214-008-9447-8
  • Wedemeyer-Böhm, Sven & Rouppe, Van Der Voort Luc (2009). On the continuum intensity distribution of the solar photosphere. Astronomy and Astrophysics.  ISSN 0004-6361.  503(1), s 225- 239 . doi: 10.1051/0004-6361/200911983
  • Wedemeyer-Böhm, Sven & Rouppe, Van Der Voort Luc (2009). Small-scale swirl events in the quiet Sun chromosphere. Astronomy and Astrophysics.  ISSN 0004-6361.  507(1), s L9- L12 . doi: 10.1051/0004-6361/200913380
  • Wedemeyer-Böhm, Sven & Rouppe, Van Der Voort Luc (2009). The solar continuum intensity distribution. Settling the conflict between observations and simulations. MEMORIE della Società Astronomica Italiana.  ISSN 0037-8720.  80
  • Wöger, Friedrich; Wedemeyer-Böhm, Sven; Uitenbroek, H. & Rimmele, T. R. (2009). MORPHOLOGY AND DYNAMICS OF THE LOW SOLAR CHROMOSPHERE. The Astrophysical Journal.  ISSN 0004-637X.  706(1), s 148- 157 . doi: 10.1088/0004-637X/706/1/148
  • Wedemeyer-Böhm, Sven & Wöger, Friedrich (2008). Small-scale structure and dynamics of the lower solar atmosphere, In R. Erdélyi & C. A. Mendoza-Briceno (ed.),  Waves and Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology.  Cambridge University Press.  ISBN 0-521-874696.  Chapter.  s 66 - 73
  • Steiner, Oskar; Rezaei, Rezza; Schaffenberger, Werner & Wedemeyer-Böhm, Sven (2008). The Horizontal Internetwork Magnetic Field: Numerical Simulations in Comparison to Observations with Hinode. The Astrophysical Journal.  ISSN 0004-637X.  680(1), s L85- L88
  • Wedemeyer-Böhm, Sven (2008). Point spread functions for the Solar optical telescope onboard Hinode. Astronomy and Astrophysics.  ISSN 0004-6361.  487, s 399- 412 . doi: 10.1051/0004-6361:200809819
  • Wedemeyer-Böhm, Sven; Lagg, Andreas & Nordlund, Åke (2008). Coupling from the photosphere to the chromosphere and the corona. Space Science Reviews.  ISSN 0038-6308.  OnlineFirst . doi: 10.1007/s11214-008-9447-8
  • Leenaarts, Jorrit; Wedemeyer-Böhm, Sven; Carlsson, Mats Per-Olof & Hansteen, Viggo (2007). Non-equilibrium Hydrogen Ionization in the Solar Atmosphere, In Petr Heinzel; Ivan Dorotovic & Robert Rutten (ed.),  The Physics of Chromospheric Plasmas.  Astronomical Society of the Pacific.  ISBN 978-1-583812-36-5.  368.  s 103 - 106
  • Rezaei, R.; Steiner, O.; Wedemeyer-Böhm, Sven; Schlichenmaier, R.; Schmidt, W. & Lites, B.W. (2007). Hinode observations reveal boundary layers of magnetic elements in the solar photosphere. Astronomy and Astrophysics.  ISSN 0004-6361.  476, s L33- L36 . doi: 10.1051/0004-6361:20078371
  • Steiner, O.; Vigeesh, G.; Krieger, L.; Wedemeyer-Böhm, Sven; Schaffenberger, W. & Freytag, B. (2007). First local helioseismic experiments with CO(5)BOLD. Astronomical Notes - Astronomische Nachrichten.  ISSN 0004-6337.  328 . doi: 10.1002/asna.200610738
  • Wedemeyer-Böhm, Sven; Ludwig, HG; Steffen, M.; Leenaarts, J. & Freytag, B. (2007). Inter-network regions of the Sun at millimetre wavelengths. Astronomy and Astrophysics.  ISSN 0004-6361.  471, s 977- 991 . doi: 10.1051/0004-6361:20077588
  • Wedemeyer-Böhm, Sven & Steffen, M. (2007). Carbon monoxide in the solar atmosphere II. Radiative cooling by CO lines. Astronomy and Astrophysics.  ISSN 0004-6361.  462, s L31- L35 . doi: 10.1051/0004-6361:20066173
  • Wedemeyer-Böhm, Sven; Steiner, O.; Bruls, J. & Rammacher, W. (2007). What is Heating the Quiet-Sun Chromosphere?, In Petr Heinzel; Ivan Dorotovic & Robert Rutten (ed.),  The Physics of Chromospheric Plasmas.  Astronomical Society of the Pacific.  ISBN 978-1-583812-36-5.  368.  s 93 - 102
  • Leenaarts, Jorrit & Wedemeyer-Boehm, S. (2006). Time-dependent hydrogen ionisation in 3D simulations of the solar chromosphere - Methods and first results. Astronomy and Astrophysics.  ISSN 0004-6361.  460, s 301- 307

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  • Wedemeyer, Sven (2015). Rød sol og evig daggry: Leting etter liv på fjerne kloder, I: Jostein Riiser Kristiansen; Anna Kathinka Dalland Evans; Henrik Svensen; Bjørn Hallvard Samset & Hanne Sigrun Byhring (red.),  Stjerneklart – siste nytt fra verdensrommet.  Spartacus.  ISBN 9788243009738.  Kapittel 15.  s 96 - 108
  • Ayres, T. R.; Lyons, J. R.; Ludwig, Hans-Günter; Caffau, E. & Wedemeyer-Böhm, Sven (2013). Isotopic CO in the Solar Photosphere, Viewed Through the Lens of 3D Spectrum Synthesis.
  • Wedemeyer-Böhm, Sven & van der Voort, Luc Rouppe (2010). The solar continuum intensity distribution. Proceedings of the International Astronomical Union.  ISSN 1743-9213.  15, s 333- 334
  • Kjeldseth-Moe, Olav & Wedemeyer-Böhm, Sven (2009). Are there variations in Earth’s global mean temperature related to the solar activity?.
  • Rezaei, Rezza; Steiner, Oskar; Wedemeyer-Böhm, Sven; Schlichenmaier, Rolf & Lites, Bruce W. (2007). Variation of the Stokes-V area asymmetry across magnetic elements. Astronomical Notes - Astronomische Nachrichten.  ISSN 0004-6337.  328(7), s 706
  • Wedemeyer-Böhm, Sven (2007). Small-scale structure and dynamics of the lower solar atmosphere.

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Published Nov. 3, 2010 3:21 PM - Last modified Nov. 3, 2017 3:00 PM

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