Auflistung nach Schlagwort "Sternatmosphären {Astronomie}"
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Chromospheric and coronal activity - analysing optical spectra of M dwarfs
(Univ. Hamburg, 2005)Unter stellarer Aktivität werden eine Reihe von Phänomenen in den unterschiedlichen Atmosphärenschichten zusammengefasst, die eng mit dem Magnetfeld des einzelnen Sterns verbunden sind. Da eine direkte Auflösung der ... -
Chromospheric and coronal activity in solar-like stars
(Univ. Hamburg, 2008)The term "stellar activity" summarizes a number of phenomena on the stellar surface and in the stellar atmosphere. The origin of many of these phenomena are changes in the structure of the stellar magnetic field. While ... -
Modeling atmospheres of classical novae in X-rays with PHOENIX
(Univ. Hamburg, 2005)PHOENIX has been used to calculate model atmospheres of classical novae in the X-ray spectral range. The models account for an expanding, one-dimensional spherically symmetric medium in full non-local thermodynamic ... -
Non-analytical line profiles in stellar atmospheres - for planetary host star systems
(Univ. Hamburg, 2008)In this work, nonanalytical line profiles for both cool and hot, dense atmospheres are added to the opacity calculations of the multipurpose stellar atmosphere code PHOENIX. Their influence on model atmospheres and synthetic ... -
Spot evolution and differential rotation of the ultrafast rotator Speedy Mic
(Univ. Hamburg, 2004)The Sun shows a variety of transient surface features which are summarized as solar activity. Activity phenomena, apparently similar to the solar case, are also observed on stars other than the Sun. Stellar activity is ...