Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Michal Sobotka"'
Autor:
Michal Sobotka, Klaus G. Puschmann
High-resolution observations of horizontal motions in the penumbra are needed to complement the concept of penumbrae obtained from spectropolarimetry. Time series of intensity images of a large sunspot in AR 10634 acquired with the Swedish Solar Tele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb62aa38c9920c3e054cd6af98c2b383
http://arxiv.org/abs/2205.03171
http://arxiv.org/abs/2205.03171
Aims: To study the heating of solar chromospheric magnetic and nonmagnetic regions by acoustic and magnetoacoustic waves, the deposited acoustic-energy flux derived from observations of strong chromospheric lines is compared with the total integrated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8636b9c3b8dded2812806efb572f0b3a
http://arxiv.org/abs/2102.08678
http://arxiv.org/abs/2102.08678
Context: The evolution of solar active regions is still not fully understood. The growth and decay of active regions have mostly been studied in case-by-case studies. Aims: Instead of studying the evolution of active regions case by case, we performe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99b461f8dc1850ade4a3cc52aae0f433
Autor:
Michal Sobotka, Partha Sarathi Pal, Christoph Kuckein, H. Balthasar, Ioannis Kontogiannis, Carsten Denker, Meetu Verma, Ekaterina Dineva, A. Diercke
Publikováno v:
Astronomy & Astrophysics
High-spectral resolution observations using the VTT echelle spectrograph in the chromospheric H$\alpha$ line were obtained in the early growth phase of active region NOAA 12722. Noise-stripped H$\alpha$ line profiles yield maps of line-core and bisec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c411ad5a574dde95bfcaff5631c9c05
Autor:
T. Waldmann, Reza Rezaei, Thomas Berkefeld, J. Kavka, Klaus G. Strassmeier, Harald Nicklas, Axel Hofmann, D. Orozco Suárez, M. Collados Vera, R. Vasková, W. Schmidt, Michael Sigwarth, Peter Gömöry, Carsten Denker, Andreas Lagg, Alex Feller, Michal Sobotka, O. von der Lühe, S. J. González Manrique, Christoph Kuckein, P. Schwartz, Sami K. Solanki, Rolf Schlichenmaier, A. Pastor Yabar, A. Kučera, D. Soltau, H. Balthasar, Dirk Schmidt, Reiner Volkmer, J. Staude
Publikováno v:
Astronomische Nachrichten. 337:1050-1056
Arch filament systems occur in active sunspot groups, where a fibril structure connects areas of opposite magnetic polarity, in contrast to active region filaments that follow the polarity inversion line. We used the GREGOR Infrared Spectrograph (GRI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::947e71ab4d5f08493d3d7fd86498867d
https://doi.org/10.1002/asna.201612432
https://doi.org/10.1002/asna.201612432
Publikováno v:
Solar Physics. 293
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b62ac8a064da2378ff1f83bf71dbb860
https://doi.org/10.1007/s11207-018-1262-0
https://doi.org/10.1007/s11207-018-1262-0
Publikováno v:
Proceedings of the International Astronomical Union. 11:268-277
Observations of flare emissions in the optical continuum are very rare. Therefore, the analysis of such observations is useful and may contribute to our understanding of the flaring chromosphere and photosphere. We study the white light continuum emi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2a748f2eeb8defbbf57f38ddf22a077
https://doi.org/10.1017/s1743921316002192
https://doi.org/10.1017/s1743921316002192
Autor:
Michal Sobotka, Reza Rezaei
Observations of a relation between continuum intensity and magnetic field strength in sunspots have been made during nearly five decades. This work presents full-Stokes measurements of the full-split (g = 3) line Fe I 1564.85 nm with spatial resoluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05b343a5d9bfb0a1874adf16e3674cb3
Acoustic and magnetoacoustic waves are among the possible candidate mechanisms that heat the upper layers of solar atmosphere. A weak chromospheric plage near a large solar pore NOAA 11005 was observed on October 15, 2008 in the lines Fe I 617.3 nm a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2490cb8c6bda330a7f009d4909e0027
http://arxiv.org/abs/1605.04794
http://arxiv.org/abs/1605.04794