Results 81 to 90 of about 4,300 (180)
Magnetohydrostatic equilibrium in starspots: dependences on color (T_{eff}) and surface gravity (g)
, 2010 Temperature contrasts and magnetic field strengths of sunspot umbrae broadly follow the thermal-magnetic relationship obtained from magnetohydrostatic equilibrium.
Cox +4 more
core +1 more source
Sunspots, Starspots, and Elemental Abundances
The Astrophysical Journal, 2017 Abstract Element abundances in the solar photosphere, chromosphere, transition region, and corona are key parameters for investigating sources of the solar wind and for estimating radiative losses in the quiet corona and in dynamical events such as solar flares.
G. A. Doschek, H. P. Warren
openaire +1 more source
The Astrophysical JournalStarspots are ubiquitous in young, low-mass stars, yet their impact on the spectral classification and fundamental parameter inference of pre-main-sequence stars (PMS) has been largely overlooked.
Facundo Pérez Paolino +4 more
doaj +1 more source
Characterisation of starspot structure and differential rotation of Kepler-411
Astronomy & AstrophysicsContext. Starspots and their movements on stellar surfaces enable the mechanisms of stellar magnetic activity to be investigated. Information on the spot distribution and differential rotation provide important constraints for the behaviour of stellar ...
Tuomi Mikko +2 more
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Acta Polytechnica CTU Proceedings, 2015 New spectroscopic and photometric observations of SS Cygni, the brightest dwarf nova system, have been obtained, with the aim of mapping starspots on the surface of the secondary star.
R. C. Smith +3 more
doaj +1 more source
, 2011 The WASP-10 planetary system is intriguing because different values of radius have been reported for its transiting exoplanet. The host star exhibits activity in terms of photometric variability, which is caused by the rotational modulation of the spots.
Baraffe +57 more
core +1 more source
Starspots: signatures of stellar magnetic activity [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractStarspots, just as Sunspots, are among the most obvious tracers and signatures of stellar surface magnetic activity. Emphasized already several decades ago as the origin for the rotationally modulated brightness of cool late-type stars, it is just now that we start to trace individual surface features in great enough detail to understand their ...
openaire +1 more source
Starspot Distribution and Flare Events in Two Young Low-mass Stars Using TESS Data
The Astrophysical JournalWide-field high-precision photometric observations such as the Transiting Exoplanet Survey Satellite (TESS) allowed the investigation of the stellar magnetic activity of cool stars. M dwarf starspots and stellar flares are the main indicators of magnetic
Rajib Kumbhakar +3 more
doaj +1 more source
What we don't know about starspots [PDF]
Symposium - International Astronomical Union, 1996 The scope of this paper will be starspots, and by that I mean regions cooler than the surrounding photosphere (like sunspots) but I also mean the whole range from very small (like sunspots) to very large (such as seen on very active stars like RS CVn).
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Further Study of Starspot Activity and Measurement of Differential Rotation for SZ Piscium
The Astrophysical JournalWe present a series of nine Doppler images of the magnetically active K component of the RS CVn-type binary SZ Piscium (SZ Psc), based on high-resolution spectroscopic data collected from 2014 to 2018.
Yue Xiang +4 more
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