Stellar rotation
Constraining stellar physics from red-giant stars in binaries – stellar rotation, mixing processes and stellar activity
... Asteroseismology is a powerful tool to study stellar struc- ture and dynamics as well as their evolution [1]. The NASA Kepler mission [2] delivered unprecedented, high- precision photometric data, enabling us to ...
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Testing the recovery of stellar rotation signals from Kepler light curves using a blind hare and hounds exercise
... of stellar rotation and differential rotation in Kepler light ...differential rotation and spot evolution. The range of rotation periods, activity levels and spot lifetime were chosen ...
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Star planet interactions: I Stellar rotation and planetary orbits
... the stellar radius at the power 8) and we may expect that, everything being equal, when an engulfment occurs, it will occur at an earlier evolutionary stage (typically at smaller lumi- nosities along the RGB) ...
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Rossiter McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems
... of-transit stellar line ...limb-darkened stellar rotation pro- file, a Gaussian representing the local intrinsic line profile, and a term corresponding to the effect on the line profile of the ...
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Rossiter–McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems
... the stellar radius constraint led to insignificant variations in stellar density (which is computed directly from the photometric light curve, and therefore is distinct from the mass and radius ...
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An accurate mass determination for Kepler 1655b, a moderately irradiated world with a significant volatile envelope
... Our rotation period estimates are in rough agreement with each other, although they do differ by more than 1-σ according to our MCMC-derived ...the stellar rotation, namely the active re- gions on ...
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The open flux evolution of a solar mass star on the main sequence
... the rotation period for moderately active main- sequence solar-like ...the stellar rotation period evolves as a result of magnetized stellar winds that carry away angular ...and stellar ...
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The energy budget of stellar magnetic fields
... map stellar magnetic fields, many of which display strong bands of azimuthal fields that are ...the rotation- activity ...the stellar rotation period with fast rotators displaying higher ...
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The energy budget of stellar magnetic fields
... of stellar magnetic fields contains the free energy that, once liberated, is responsible for energetic ...the stellar environment, and can affect any plan- ets orbiting the star (Zarka 2007; Grießmeier, ...
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The host stars of Kepler's habitable exoplanets : superflares, rotation and activity
... long stellar rotation periods problems can be ...star rotation periods, we make use of the Kepler Asteroseismic Science Operations Center (KASOC) light ...
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Internal rapid rotation and its implications for stellar structure and pulsations
... fields, stellar pulsation modes with the same radial order, n, and harmonic degree, and , but differing azimuthal orders, m, have the same frequencies and are thus ...that rotation lifts this degeneracy [25], ...
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The open flux evolution of a solar-mass star on the main sequence
... the rotation period– age plane (for solar-mass stars, convergence occurs at ∼ 1 ...and rotation history of a host star can also have a significant impact on the potential habitability of exo- planets (Wood ...
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Stellar magnetic activity – Star-Planet Interactions
... by stellar rotation and produces highly structured magnetic fields; in the case of stars with a radiative core and a convective outer envelope (spectral type mid-F to early-M), this is an αΩ dynamo, while ...
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The stellar kinematics and populations of boxy bulges: cylindrical rotation and vertical gradients
... SSP-equivalent stellar population properties derived from these line strengths suggest that the bulge is comprised of an old stellar population, 10 Gyr with no systematic trend in age as a function of z, ...
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Magnetic fields on young, moderately rotating Sun-like stars - I. HD 35296 and HD 29615
... with a resolution of ∼ 65 000 spanning 40 grating orders (orders #22 to #61). NARVAL consists of one fixed quarter-wave retarder sandwiched between two rotating half-wave retarders and coupled to a Wollaston beamsplitter ...
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On the effects of rotation on acoustic stellar pulsations: validity domains of perturbative methods and close frequency pairs
... In this study, the effects of stellar rotation on acoustic pulsation fre- quencies have been investigated using a second-order perturbative and a two-dimensional approach. A comparison of the two shows that ...
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A path towards understanding the rotation activity relation of M dwarfs with K2 mission, X ray and UV data
... between stellar rotation and magnetic activity for a sample of 134 bright, nearby M dwarfs observed in the Kepler Two-Wheel (K2) mission during campaigns ...derived rotation periods for 97 stars (79 ...
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Observational clues to the physics at the magnetosphere in young stellar objects
... the stellar magnetic field that is inclined with respect to the stellar rotation ...the stellar rotation period (measured from radial velocity variations of the photopheric absorption ...
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Doppler monitoring of five k2 transiting planetary systems
... the stellar parameters derived from broadband photo- ...of stellar variability of the host star. Stellar activity such as spots and plages introduces radial-velocity perturbations on a characteristic ...
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Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?
... rapid rotation than expected from the stars’ isochronal age, and therefore an underestimated gyrochronology ...in stellar clusters, I also find that in some cases isochrone fitting can overestimate the age ...
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