Results 51 to 60 of about 205 (134)
MODELING SUNSPOT AND STARSPOT DECAY BY TURBULENT EROSION [PDF]
The Astrophysical Journal, 2015 Astrophysical Journal ...
Litvinenko, Yuri E., Wheatland, M. S.
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Molecules as magnetic probes of starspots [PDF]
Astronomy & Astrophysics, 2015 Stellar dynamo processes can be explored by measuring the magnetic field. This is usually obtained using the atomic and molecular Zeeman effect in spectral lines. While the atomic Zeeman effect can only access warmer regions, the use of molecular lines is of advantage for studying cool objects.
Afram, N., Berdyugina, S. V.
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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
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The microlensing signatures of starspots
, 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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KIC 6362386: An Eclipsing Binary with γ Doradus–type Pulsations and Starspots
The Astronomical JournalKIC 6362386 is an eclipsing binary system that exhibits both γ Doradus ( γ Dor)–type pulsations and starspots. In this study, we investigated this binary system using the Kepler photometry and the spectroscopic data from the Large Sky Area Multi-Object ...
Mengqi Jin +7 more
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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
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The Astrophysical Journal, 1974 Sizes of starspots on flare stars can be derived from the author's convection-cell hypothesis. The sizes are in fair agreement with those observed on YY Gem, CC Eri, and BY Dra by Bopp and Evans (1973). The hypothesis predicts that periodic brightness variations due to starspots are restricted to stars brighter than a critical absolute visual ...
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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
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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
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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 ...
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