Results 81 to 90 of about 904 (176)
Interferometric Imaging of λ Andromedae: Evidence of Starspots and Rotation
, 2021 Presented are the first interferometric images of cool starspots on the chromospherically active giant λ Andromedae. Using the Michigan Infra-Red Combiner coupled to the Center for High Angular Resolution Astronomy Array, 26 interferometric observations ...
White, Russel J. +16 more
core
On the detectability of starspot magnetic fields
The Astrophysical Journal, 1979 A starspot is here considered as the surface manifestation of a submerged magnetic dipole. It seems likely that in red dwarfs, the dipole is generated by dynamo action within the outer convection zone. As a result, a starspot-associated dipole is highly decentered.
openaire +1 more source
Sunspots, Starspots, and Elemental Abundances
The Astrophysical Journal, 2017 Abstract Element abundances in the solar photosphere, chromosphere, transition region, and corona are key parameters for investigating sources of the solar wind and for estimating radiative losses in the quiet corona and in dynamical events such as solar flares.
G. A. Doschek, H. P. Warren
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A Flexible Model for Investigating Properties of Starspots: Comparison of Models to Observed Data
, 2018 Cool, late-type stars have proven problematic when determining accurate age estimates for young open clusters due to inaccuracies in stellar evolution models.
Ash, Amanda +5 more
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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
doaj +1 more source
Formation of starspots in self-consistent global dynamo models: Polar spots on cool stars
, 2014 Context. Observations of cool stars reveal dark spot-like features on their surfaces. Compared to sunspots, starspots can be bigger or cover a larger fraction of the stellar surface.
Christensen, Ulrich R. +11 more
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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
doaj +1 more source
The contribution of starspots to coronal structure
, 2010 10 pages, 10 ...
Arzoumanian, Doris +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
doaj +1 more source
Dynamics of Large-Scale Solar Flows. [PDF]
Space Sci Rev, 2023 Hotta H +4 more
europepmc +1 more source