Results 61 to 70 of about 4,300 (180)
Surface image and activity-corrected orbit of the RSCVn binary HR7275
Astronomy & AstrophysicsContext. Quantifying stellar parameters and magnetic activity for cool stars in double-lined spectroscopic binaries (SB2s) is not straightforward, as both stars contribute to the observed composite spectra and are likely variable.
Adebali Ö. +5 more
doaj +1 more source
Is it possible to detect planets around young active G and K dwarfs? [PDF]
, 2013 Theoretical predictions suggest that the distribution of planets in very young stars could be very different to that typically observed in Gyr old systems that are the current focus of radial velocity surveys.
A. Reiners +61 more
core +4 more sources
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.
openaire +1 more source
Stellar Flares, Superflares, and Coronal Mass Ejections—Entering the Big Data Era
UniverseFlares, sometimes accompanied by coronal mass ejections (CMEs), are the result of sudden changes in the magnetic field of stars with high energy release through magnetic reconnection, which can be observed across a wide range of the electromagnetic ...
Krisztián Vida +8 more
doaj +1 more source
KIC 7284688: A Solar-type Eclipsing Binary with Rapidly Varying O’Connell Effect
The Astronomical Journal, 2023 We present comprehensive photometric and spectroscopic study of the short-period eclipsing binary KIC 7284688 based on the Kepler, TESS, and LAMOST data.
Yang Pan, Xiaobin Zhang
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The contribution of starspots to coronal structure [PDF]
, 2010 Significant progress has been made recently in our understanding of the structure of stellar magnetic fields, thanks to advances in detection methods such as Zeeman-Doppler Imaging.
Arzoumanian, Doris +4 more
core +2 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.
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Multiple short-term cycles in Kepler star KIC 6876668
Astronomy & AstrophysicsContext. Solar and stellar magnetic activity may have similar properties, which can be used to understand the stellar magnetic evolution. Aims. This paper examines the multiple short-term cycles in the total irradiance of the Sun and in the light curve ...
Gurgenashvili E. +5 more
doaj +1 more source
The Astrophysical Journal, 2023 Stellar rotation is crucial for studying stellar evolution, since it provides information about age, angular momentum transfer, and magnetic fields of stars.
Alexandre Araújo, Adriana Valio
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Radial Velocity Variations from Starspots [PDF]
International Astronomical Union Colloquium, 1999 AbstractIn this contribution the radial velocity (RV) variations expected for starspots on solar-type stars are examined. The spot-induced RV amplitude is found to vary linearly with spot filling factor and is less than 1 m−1 for spot sizes comparable to large sunspots and as high as 20 m s−1 for spot filling factors of 1%.
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