Results 121 to 130 of about 1,299,626 (329)
Models for Massive Stellar Populations with Rotation [PDF]
The Astrophysical Journal, 2007 We present and discuss evolutionary synthesis models for massive stellar populations generated with the Starburst99 code in combination with a new set of stellar evolution models accounting for rotation. The new stellar evolution models were compiled from several data releases of the Geneva group and cover heavy-element abundances ranging from twice ...
André Maeder +4 more
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The Astrophysical Journal Supplement SeriesThe empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activity ...
Lifei Ye +11 more
doaj +1 more source
Radial Velocity Planet Detection Biases at the Stellar Rotational Period [PDF]
, 2016 Future generations of precise radial velocity (RV) surveys aim to achieve sensitivity sufficient to detect Earth mass planets orbiting in their stars' habitable zones. A major obstacle to this goal is astrophysical radial velocity noise caused by active areas moving across the stellar limb as a star rotates.
arxiv +1 more source
THE BANANA PROJECT. V. MISALIGNED AND PRECESSING STELLAR ROTATION AXES IN CV VELORUM [PDF]
, 2014 As part of the Binaries Are Not Always Neatly Aligned project (BANANA), we have found that the eclipsing binary CV Velorum has misaligned rotation axes.
S. Albrecht +10 more
semanticscholar +1 more source
TESS Asteroseismology of β Hydri: A Subgiant with a Born-again Dynamo
The Astrophysical JournalThe solar-type subgiant β Hyi has long been studied as an old analog of the Sun. Although the rotation period has never been measured directly, it was estimated to be near 27 days.
Travis S. Metcalfe +14 more
doaj +1 more source
Differential rotation of main-sequence dwarfs and its dynamo-efficiency [PDF]
, 2010 A new version of a numerical model of stellar differential rotation based on mean-field hydrodynamics is presented and tested by computing the differential rotation of the Sun. The model is then applied to four individual stars including two moderate and two fast rotators to reproduce their observed differential rotation quite closely.
arxiv +1 more source
STELLAR ROTATION–PLANETARY ORBIT PERIOD COMMENSURABILITY IN THE HAT-P-11 SYSTEM [PDF]
, 2014 A number of planet host stars have been observed to rotate with a period equal to an integer multiple of the orbital period of their close planet. We expand this list by analyzing Kepler data of HAT-P-11 and finding a period ratio of 6:1.
B. B'eky +3 more
semanticscholar +1 more source
Determination of Stellar Rotational Velocities [PDF]
Symposium - International Astronomical Union, 1985 The three basic methods for measuring axial rotation of stars had been suggested before the beginning of this century. These are (1) Modulation of starlight due to dark or bright areas on a rotating star; (2) Distortions in the radial velocity curves of eclipsing binary systems; and (3) Line profile analysis. Research in each of these areas is reviewed.
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EPJ Web of Conferences, 2017 The unparalleled photometric data obtained by NASA’s Kepler Space Telescope has led to an improved understanding of stellar structure and evolution - in particular for solar-like oscillators in this context. Binary stars are fascinating objects.
Beck P. G. +12 more
doaj +1 more source
Studying Stellar Rotation and Convection [PDF]
, 2013 Based on the lecture notes of a school titled "Tides in Astronomy and Astrophysics" that brought together students and researchers, this book focuses on the fundamental theories of tides at different scales of the universe - from tiny satellites to whole galaxies - and on the most recent developments.
Goupil, Marie-José +4 more
openaire +3 more sources