Results 11 to 20 of about 1,347 (178)
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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Torus-stable zone above starspots [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT 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’. The torus instability of magnetic flux ropes is believed to be one of the main driving mechanisms of solar CMEs.
Sun, Xudong +2 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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, 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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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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3D Radiative MHD Simulations of Starspots [PDF]
The Astrophysical Journal, 2020 Abstract 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 of starspots on G2V, K0V, and M0V stars, which will help us to better ...
Mayukh Panja +2 more
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Starspots: A Key to the Stellar Dynamo
Living Reviews in Solar Physics, 2005 Magnetic activity similar to that of the Sun is observed on a variety of cool stars with external convection envelopes. Stellar rotation coupled with convective motions generate strong magnetic fields in the stellar interior and produce a multitude of ...
Berdyugina Svetlana V.
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Starspots and Undetected Binary Stars Have Distinct Signatures in Young Stellar Associations [PDF]
The Astrophysical JournalYoung stars form in associations, meaning that young stellar associations provide an ideal environment to measure the age of a nominally coeval population.
Kendall Sullivan, Adam L. Kraus
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The Astrophysical JournalAn accurate estimation of the continuum excess emission from accretion spots and inner circumstellar disk regions is crucial for a proper derivation of fundamental stellar parameters in accreting systems.
Facundo Pérez Paolino +4 more
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