DI Herculis Revisited: Starspots, Gravity Darkening, and 3D Obliquities [PDF]
Astrophysical Journal, 2022 DI Herculis is an eclipsing binary famous for a longstanding disagreement between theory and observation of the apsidal precession rate, which was resolved when both stars were found to be severely misaligned with the orbit.
Yan Liang, J. Winn, S. Albrecht
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The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones for Testing the Effects of Starspots on Structure and Colors [PDF]
Astrophysical Journal, 2020 One-dimensional stellar evolution models have been successful at representing the structure and evolution of stars in diverse astrophysical contexts, but complications have been noted in the context of young, magnetically active stars, as well as close ...
G. Somers, Lyra Cao, M. Pinsonneault
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The Properties and Evolutions of Starspots on Three Detached Eclipsing Binaries in the LAMOST-Kepler survey [PDF]
, 2022 The spotted detached eclipsing binary (DEB) offers insights into starspots on the binary. Three spotted DEBs, KIC 8097825, KIC 6859813, and KIC 5527172, which were observed by the Kepler photometry and LAMOST spectroscopy, are studied in this work.
Jia-Xin Wang +6 more
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Kepler-411 Star Activity: Connection between Starspots and Superflares [PDF]
Astrophysical Journal Letters, 2021 Stellar magnetic activity, just like that of the Sun, manifests itself in the form of flares and spots on the surface of the star. In the solar case, the largest flares originate from large active regions. In this work, we present a study of the activity
A. Araújo, A. Valio
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Gaia-ESO Survey: Role of magnetic activity and starspots on pre-main-sequence lithium evolution [PDF]
Astronomy & Astrophysics, 2021 Pre-main sequence models with inflated radii are needed to simultaneously reproduce the colour-magnitude diagram and the lithium depletion pattern in young open clusters.
E. Franciosini +26 more
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The Relationship of Stellar Radius Inflation to Rotation and Magnetic Starspots at 10–670 Myr [PDF]
Astrophysical Journal LettersActive, low-mass stars are widely observed to have radii that are larger than predicted by standard stellar models. Proposed mechanisms for this radius inflation generally involve stellar magnetism, either in the form of added pressure support in the ...
Lyra Cao, K. Stassun
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From Starspots to Stellar Coronal Mass Ejections—Revisiting Empirical Stellar Relations [PDF]
Astrophysical Journal, 2020 Upcoming missions, including the James Webb Space Telescope, will soon characterize the atmospheres of terrestrial-type exoplanets in habitable zones around cool K- and M-type stars by searching for atmospheric biosignatures.
K. Herbst +3 more
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Starspots on eclipsing giant stars. I. The sample and eclipse mapping examples [PDF]
Astronomy & AstrophysicsSpotted stars in eclipsing binary systems allow us to gather significant information about the stellar surface inhomogeneities that is otherwise unobtainable from only photometric data.
K. Ol'ah +14 more
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The Effect of Starspots on Spectroscopic Age and Mass Estimates of Nonaccreting T Tauri Stars in the Taurus–Auriga Star-forming Region [PDF]
Astrophysical JournalAccurate age and mass determinations for young pre-main-sequence stars are made challenging by the presence of large-scale starspots. We present results from a near-infrared spectroscopic survey of 10 T-Tauri Stars in Taurus-Auriga that characterize spot-
Facundo Pérez Paolino +3 more
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Characterization of starspots on a young M-dwarf K2-25: multi-band observations of stellar photometric variability and planetary transits [PDF]
Monthly notices of the Royal Astronomical SocietyDetailed atmospheric characterization of exoplanets by transmission spectroscopy requires careful consideration of stellar surface inhomogeneities induced by starspots.
M. Mori +15 more
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