Results 11 to 20 of about 2,749 (159)
Torus-Stable Zone Above Starspots [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 Whilst intense solar flares are almost always accompanied by a coronal mass ejection (CME), reports on stellar CMEs are rare, despite the frequent detection of stellar ‘super flares’.
Xu-Dong Sun, T. Török, M. DeRosa
semanticscholar +5 more sources
3D Radiative MHD Simulations of Starspots [PDF]
The Astrophysical Journal, 2020 There are no direct spatially resolved observations of spots on stars other than the Sun, and starspot properties are inferred indirectly through lightcurves and spectropolarimetric data. We present the first self-consistent 3D radiative MHD computations
Mayukh Panja, R. Cameron, S. Solanki
semanticscholar +6 more sources
The Astronomical Journal, 2016 ABSTRACT By analyzing K2 short-cadence observations, we detect starspots on WASP-85A, the host star of the hot Jupiter WASP-85Ab. The detection of recurring starspot occultation events indicates that the planet’s orbit is aligned with the star’s rotational axis ( λ
T. Močnik +4 more
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The microlensing signatures of starspots [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 Point lens microlensing events with impact parameter close to the source stellar radius allow the observer to study the surface brightness profile of the lensed source. We have examined the effect of photospheric star spots on multicolour microlensing lightcurves and investigated the detectability of such spots in different wavebands as a function of ...
Hendry, M. A. +2 more
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3D radiative MHD simulations of starspots. II. Large-scale structure [PDF]
Astronomy & AstrophysicsWe computed realistic 3D radiative magnetohydrodynamic (MHD) near-surface models of starspots with substantial penumbrae on cool main sequence stars using the MURaM simulation code.
T. Bhatia +3 more
semanticscholar +2 more sources
Hunt for Starspots in HARPS Spectra of G and K Stars [PDF]
Astronomical Journal, 2020 We present a method for detecting starspots on cool stars using the cross-correlation function (CCF) of high-resolution molecular spectral templates applied to archival high-resolution spectra of G and K stars observed with the High Accuracy Radial ...
Brett M. Morris +3 more
semanticscholar +5 more sources
Differential rotation of Kepler-71 via transit photometry mapping of faculae and starspots [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Knowledge of dynamo evolution in solar-type stars is limited by the difficulty of using active region monitoring to measure stellar differential rotation, a key probe of stellar dynamo physics.
S. Zaleski +3 more
semanticscholar +2 more sources
Starspots and Undetected Binary Stars Have Distinct Signatures in Young Stellar Associations [PDF]
Astrophysical JournalYoung stars form in associations, meaning that young stellar associations provide an ideal environment to measure the age of a nominally coeval population.
K. Sullivan, A. Kraus
semanticscholar +4 more sources
Starspots, cycles, and magnetic fields [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractI make a perhaps slightly foolhardy attempt to synthesize a semi-coherent scenario relating cycle characteristics, starspots, and the underlying magnetic fields with stellar properties such as mass and rotation. Key to this attempt is to first study single dwarfs; differential rotation plays a surprising role.
Steven H. Saar
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, 2008 The past two decades have seen remarkable advances in observations of sunspots and their magnetic fields, in imaging of spots and fields in distant stars and in associated theoretical models and numerical simulations. This book provides a comprehensive combined account of the properties of sunspots and starspots. It covers both observations and theory,
John H. Thomas, Nigel O. Weiss
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