Direct Observations of Rotationally Distorted Stars
نویسندگان
چکیده
منابع مشابه
Direct Observations of Rotationally Distorted Stars
We present infrared interferometric angular size measurements for rapidly rotating stars which indicate non-circular projected disk brightness distributions. For the A7IV-V star Altair, assuming that the apparent oblateness of the photosphere is due to the star's rapid rotation, a rigorous evaluation of the observation data in the context of a rigidly rotating Roche model shows that an estimate...
متن کاملStructure and evolution of rotationally and tidally distorted stars
Aims. This paper aims to study the configuration of two components caused by rotational and tidal distortions in the model of a binary system. Methods. The potentials of the two distorted components can be approximated to 2nd-degree harmonics. Furthermore, both the accretion luminosity (σi) and the irradiative luminosity are included in stellar structure equations. Results. The equilibrium stru...
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On the basis of earlier investigations on homeoidally striated Mac Laurin spheroids and Jacobi ellipsoids (Caimmi and Marmo 2005; Caimmi 2006a, 2007), different sequences of configurations are defined and represented on the ellipticity-rotation plane, (Oêχv). The rotation parameter, χv, is defined as the ratio, Erot/Eres, of kinetic energy related to the mean tangential equatorial velocity comp...
متن کاملAn estimation of structure parameters of rotationally and tidally distorted polytropic models of stars in the presence of Coriolis force
In this paper we propose suitable modifications in the concept of Roche equipotential to account for the effects of Coriolis force on its equipotential surface besides the usual effects of gravitational and centrifugal forces and use this in conjunction with Kippenhahn and Thomas, 1970 approach in a manner earlier used by Mohan et al, 1990 to incorporate the effects of Coriolis force in the equ...
متن کاملStructures and oscillations of rotationally and tidally distorted polytropic models of stars in the presence of the Coriolis force
The problems of equilibrium structures and periods of oscillations of rotationally and/or tidally distorted polytropic models of stars in binary systems have been studied previously. In the studies, only the effects of gravitational and centrifugal forces while obtaining the Roche equipotential of such stars were considered. The Coriolis force were not considered. In the present study, we have ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2004
ISSN: 0074-1809
DOI: 10.1017/s0074180900195518