Bayesian isochrone fitting and stellar ages
نویسندگان
چکیده
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,...
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Asteroseismology has been recognized for a long time as a very powerful mean to probe stellar interiors. The oscillations frequencies are closely related to stellar internal structure properties via the density and the sound speed profiles. Since these properties are in turn tightly linked with the mass and evolutionary state, we can expect to determine the age and mass of a star from the compa...
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A new method is presented to compute age estimates from theoretical isochrones using temperature, luminosity and metallicity data for individual stars. Based on Bayesian probability theory, this method avoids the systematic biases affecting simpler strategies, and provides reliable estimates of the age probability distribution function for late-type dwarfs. Basic assumptions about the a priori ...
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We first presented an isochrone database that can be widely used for stellar population synthesis studies and color magnitude diagram (CMD) fittings. The database consists of the isochrones of both single and binary stellar populations (SSPs and BSPs). The ranges for the age and metallicity of populations are 0–15 Gyr and 0.0001–0.03, respectively. All data are available for populations with tw...
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are recorded from patients during surgery and from animals in the research laboratory for a variety of purposes. During such recordings, a portion of the cardiac surface is exposed to air, and the remainder of the epicardial surface variably is in contact with conductive tissue. No systematic studies document the degree to which these different conditions affect measured excitation times, poten...
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ژورنال
عنوان ژورنال: EAS Publications Series
سال: 2014
ISSN: 1633-4760,1638-1963
DOI: 10.1051/eas/1465006