Results 71 to 80 of about 4,300 (180)
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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Modeling Stellar Ca ii H and K Emission Variations: Spot Contribution to the S-index
The Astrophysical Journal Letters, 2023 The S -index is a measure of emission in the Ca ii H and K lines and is a widely used proxy of stellar magnetic activity. It has been assumed until now that the S -index is mainly affected by bright plage regions in the chromosphere.
K. Sowmya +4 more
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The Impact of Starspots on Mass and Age Estimates During The Pre-Main Sequence
, 2015 We investigate the impact of starspots on the evolution of late-type stars during the pre-main sequence (pre-MS). We find that heavy spot coverage increases the radii of stars by 4-10%, consistent with inflation factors in eclipsing binary systems, and ...
Pinsonneault, Marc H., Somers, Garrett
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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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Spot evolution in the eclipsing binary CoRoT 105895502
, 2019 Stellar activity is ubiquitous in late-type stars. The special geometry of eclipsing binary systems is particularly advantageous to study the stellar surfaces and activity.
Czesla, S. +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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High Dispersion Spectroscopy of the Superflare Star KIC6934317
, 2013 We conducted the high-resolution spectroscopic observation with Subaru/HDS for a G-type star (KIC6934317). We selected this star from the data of the Kepler spacecraft.
Honda, Satoshi +7 more
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Exoplanet Research with the Stratospheric Observatory for Infrared Astronomy (SOFIA)
, 2017 When the Stratospheric Observatory for Infrared Astronomy (SOFIA) was conceived and its first science cases defined, exoplanets had not been detected. Later studies, however, showed that optical and near-infrared photometric and spectrophotometric follow-
B Placek +19 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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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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