Results 41 to 50 of about 2,749 (159)
Proceedings of the International Astronomical Union, 2010 AbstractStarspots are being observed with many different techniques but not always with coherent results. In particular not if model-dependent data analysis must be employed, e.g. through two-dimensional spot modelling of one-dimensional photometric light curves. I review the zoo of currently available physical spot parameters, i.e.
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Highlights of Astronomy, 1986 AbstractThe general methodology to detect and study solar-like surface inhomogeneities on stars is presented. The most significant observations and typical results are discussed with particular emphasis on the inferred physical characteristics of starspots and plages and differential rotation, as compared to solar values.
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Doppler Imaging of Starspots [PDF]
International Astronomical Union Colloquium, 1983 ABSTRACTWe discuss a newly-developed technique for spatially resolving starspots on some of the more rapidly rotating RS CVn stars. Basically, the method uses high resolution, very high signal-to-noise spectral line profiles and exploits the Doppler velocity correspondence between position across the stellar disk and wavelength position across a ...
Steven S. Vogt, G. Donald Penrod
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The STELLA Robotic Observatory on Tenerife
Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010 The Astrophysical Institute Potsdam (AIP) and the Instituto de Astrofísica de Canarias (IAC) inaugurated the robotic telescopes STELLA‐I and STELLA‐II (STELLar Activity) on Tenerife on May 18, 2006. The observatory is located on the Izaña ridge at an elevation of 2400 m near the German Vacuum Tower Telescope.
Klaus G. Strassmeier +12 more
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Some findings from the longitudinal migration of starspots [PDF]
Publications Astronomical Society of AustraliaWe present results regarding the longitudinal migrations of cool stellar spots that exhibit remarkable oscillations and explore their possible causes.
N. Kaya, H. A. Dal
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Stellar Properties of Active G and K Stars: Exploring the Connection between Starspots and Chromospheric Activity [PDF]
Astronomical Journal, 2019 We gathered high resolution spectra for an ensemble of 55 bright active and inactive stars using the ARC 3.5 m Telescope Echelle Spectrograph at Apache Point Observatory (R ≈ 31,500).
B. Morris +4 more
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Investigating stellar surface rotation using observations of starspots [PDF]
, 2011 Rapid rotation enhances the dynamo operating in stars, and thus also introduces significantly stronger magnetic activity than is seen in slower rotators.
Korhonen, Heidi Helena
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Starspots on by DRA-Type Stars [PDF]
Highlights of Astronomy, 1977 The first detection of spots on dwarf M stars was by Kron on YY Geminorum in 1948. Since then phenomena attributable to starspots have been found by numerous authors beginning with Kraft and Krzeminski on the star now known as BY Draconis and on CC Eridani by Evans.
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Geodynamics of Super‐Earth GJ 486b
Journal of Geophysical Research: Planets, Volume 129, Issue 10, October 2024.Abstract Many super‐Earths are on very short orbits around their host star and, therefore, more likely to be tidally locked. Because this locking can lead to a strong contrast between the dayside and nightside surface temperatures, these super‐Earths could exhibit mantle convection patterns and tectonics that could differ significantly from those ...
Tobias G. Meier +10 more
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Modeling starspots on low mass star GJ 1243 observed by TESS
, 2021 Quasi-periodic modulations of the stellar light curve may result from dark spots crossing the visible stellar disc. Since the release of the first TESS sector the possibility of examining such quasi-periodic modulations by assumed dark spots has ...
Falewicz, Robert +2 more
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