Results 61 to 70 of about 205 (134)
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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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).
openaire +1 more source
Probing Starspot Dynamics on the Active M Dwarf TIC 272272592: A Multiyear TESS Study
The Astrophysical JournalWe present an analysis of temporal starspot evolution and its distribution on an active rapid rotator ( P _rot = 1.22 days), TIC 272272592, using high-precision time-series photometry from the Transiting Exoplanet Survey Satellite spanning over 3 yr. The
Rajib Kumbhakar +4 more
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Starspot Temperature of CoRoT-2 from Multiwavelength Observations with SPARC4
The Astrophysical JournalMeasuring starspot temperatures is crucial for understanding stellar magnetic activity as it affects stellar brightness variations, influences exoplanet transit measurements, and provides constraints on the physical conditions and energy transport in ...
Adriana Valio +7 more
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EPJ Web of Conferences, 2017 Starspots are cooler and darker than the stellar surface. Therefore, the emitted flux of a star changes when spots are visible on its surface. The presence of spots together with the stellar rotation leads to a periodic modulation on the light curve.
Santos Ângela R. G. +4 more
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Possible Bright Starspots on TRAPPIST-1
The Astrophysical Journal, 2018 Abstract The M8V star TRAPPIST-1 hosts seven roughly Earth-sized planets and is a promising target for exoplanet characterization. Kepler/K2 Campaign 12 observations of TRAPPIST-1 in the optical show an apparent rotational modulation with a 3.3-day period, though that rotational signal is not readily detected in the Spitzer light curve ...
Brett M. Morris +3 more
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Polka-dotted Stars. II. Starspots and Obliquities of Kepler-17 and Kepler-63
The Astrophysical JournalStarspots trace stellar magnetic activity and affect both stellar evolution and exoplanet characterization. While occultation-based spot studies have been applied to individual systems, comparative analyses remain limited.
Sabina Sagynbayeva, Will M. Farr
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The 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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The Astrophysical JournalAU Microscopii (AU Mic) is an active 24 ± 3 Myr pre-main-sequence M dwarf in the stellar neighborhood ( d = 9.7 pc) with a rotation period of 4.86 days. The two transiting planets orbiting AU Mic, AU Mic b and c, are warm sub-Neptunes on 8.5 and 18.9 day
William C. Waalkes +7 more
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Minimizing Star-spot Contamination of Exoplanet Transit Spectroscopy Using Alternate Normalization
The Astronomical JournalRecently, M. H. Currie et al. (2023) simulated the detection of molecules in the atmospheres of temperate rocky exoplanets transiting nearby M-dwarf stars.
Drake Deming +3 more
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