منابع مشابه
Stellar Ages from Stellar Rotation
Our ability to determine stellar ages from measurements of stellar rotation, hinges on how well we can measure the dependence of rotation on age for stars of different masses. Rotation periods for stars in open clusters are essential to determine the relations between stellar age, rotation, and mass (color). Until recently, ambiguities in v sin i data and lack of cluster membership information,...
متن کاملObservational studies of stellar black hole binaries and ULXs
We outline a framework for understanding the X-ray spectra of high mass accretion rate stellar black holes based on X-ray data from RXTE and ASCA. Three spectral regimes can be separated out by the behaviour of the observed disk luminosity and temperature. The well established ”standard regime” is seen when the disk dominates the spectrum, where only a small fraction of the luminosity is emitte...
متن کاملAsteroseismology and Stellar Rotation
We discuss how the structure and oscillation frequencies of delta Scuti stars are aaected by fast rotation. We investigate the impact of these changes on our interpretation of observed frequencies used in an as-teroseismic analysis. We nd that, to rst order, frequency ratios between pairs of radial modes are not sensitive to rotation. However, for non-radial modes we nd that second-order terms ...
متن کاملThe stellar activity - rotation relationship
Key words stars: activity – stars: coronae – stars: late-type – stars: magnetic fields – stars: rotation – X-rays: stars Using a new catalog of 824 solar and late-type stars with measured X-ray luminosities and rotation periods we have studied the relationship between rotation and stellar activity that is believed to be a probe of the underlying stellar dynamo. Using an unbiased subset of the s...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2013
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas/1362005