منابع مشابه
Stellar ages from asteroseismology
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...
متن کاملStellar 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 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 کاملModels of Stellar Structure for Asteroseismology
Among the problems still open in the study of stellar structure, we discuss in particular some issues related to the study of convection. We have recently built up complete stellar models, adopting a consistent formulation of convection both in the non gray atmosphere and in the interior, to be used for non adiabatic pulsational analysis, and discuss in some details two problems which have been...
متن کاملAsteroseismology and the Solar-Stellar Connection
In March 2009, NASA will launch the Kepler satellite—a mission designed to discover habitable Earth-like planets around distant Sun-like stars. The method that Kepler will use to detect distant worlds will only reveal the size of the planet relative to the size of the host star, so part of the mission is devoted to characterizing other suns using asteroseismology. In this proceedings, I give a ...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2008
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921309032074