Results 61 to 70 of about 4,942 (197)
, 2017 Several studies have shown that stellar activity features, such as occulted and non-occulted starspots, can affect the measurement of transit parameters biasing studies of transit timing variations and transmission spectra. We present $\texttt{PyTranSpot}
Cubillos, P. E. +7 more
core +1 more source
Starspot detection and properties [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractI review the currently available techniques for the starspots detection including the one-dimensional spot modelling of photometric light curves. Special attention will be paid to the modelling of photospheric activity based on the high-precision light curves obtained with space missions MOST, CoRoT, and Kepler.
openaire +1 more source
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
doaj +1 more source
Tidal Synchronization and Differential Rotation of Kepler Eclipsing Binaries [PDF]
, 2017 Few observational constraints exist for the tidal synchronization rate of late-type stars, despite its fundamental role in binary evolution. We visually inspected the light curves of 2278 eclipsing binaries (EBs) from the Kepler Eclipsing Binary Catalog ...
Adilia, Jamel +8 more
core +3 more sources
The Astronomical Journal, 2023 We perform an in-depth analysis of the recently validated TOI-3884 system, an M4-dwarf star with a transiting super-Neptune. Using high-precision light curves obtained with the 3.5 m Apache Point Observatory and radial velocity observations with the ...
Jessica E. Libby-Roberts +27 more
doaj +1 more source
Why do some spotted stars become bluer as they become fainter? [PDF]
, 2004 Chromospherically active, spotted stars generally become redder as well as fainter when large starspots rotate into view on the stellar disc. However, the RS CVn system UX Ari (a triple-lined system), becomes bluer as it gets fainter.
Aarum-Ulvås, V., Henry, G. W.
core +2 more sources
Swift/UVOT Photometry of the Planetary Nebula WeBo 1: Unmasking A Faint Hot Companion Star [PDF]
, 2012 We present an analysis of over 150 ks of data on the planetary nebula WeBo 1 (PN G135.6+01.0) obtained with the Swift Ultraviolet Optical Telescope (UVOT). The central object of this nebula has previously been described as a late-type K giant barium star
Bond, Howard E. +4 more
core +2 more sources
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
Investigating the Rotational Phase of Stellar Flares on M dwarfs Using K2 Short Cadence Data [PDF]
, 2018 We present an analysis of K2 short cadence data of 34 M dwarfs which have spectral types in the range M0 - L1. Of these stars, 31 showed flares with a duration between $\sim$10-90 min.
Doyle, J. G. +4 more
core +3 more sources
Starspot Mapping with Adaptive Parallel Tempering. II. Application to TESS Data for M-dwarf Flare Stars AU Microscopii, YZ Canis Minoris, and EV Lacertae [PDF]
, 2023 Kai Ikuta +7 more
openalex +3 more sources