Surface temperature and synthetic spectral energy distributions for rotationally deformed stars

Details Surface temperature and synthetic spectral energy distributions for rotationally deformed stars Surface temperature and synthetic spectral energy distributions for rotationally deformed stars

2006-02-03

arxiv.org/abs/astro-ph/0602084v1

Astrophys.J. 643 (2006) 460-470

Astronomy and Astrophysics

Astrophysics

38 pages, 9 figures (AAStex preprint format). Accepted for publication in the ApJ

Scientific paper

10.1086/501492

The spectral energy distribution (SED) of a non-spherical star could differ significantly from the SED of a spherical star with the same average temperature and luminosity. Calculation of the SED of a deformed star is often approximated as a composite of several spectra, each produced by a plane parallel model of given effective temperature and gravity. The weighting of these spectra over the stellar surface, and hence the inferred effective temperature and luminosity, will be dependent on the inclination of the rotation axis of the star with respect to the observer, as well as the temperature and gravity distribution on the stellar surface. Here we calculate the surface conditions of rapidly rotating stars with a 2D stellar structure and evolution code and compare the effective temperature distribution to that predicted by von Zeipel's law. We calculate the composite spectrum for a deformed star by interpolating within a grid of intensity spectra of plane parallel model atmospheres and integrating over the surface of the star. Using this method, we find that the deduced variation of effective temperature with inclination can be as much as 3000 K for an early B star, depending on the details of the underlying model.

Affiliated with

Also associated with

No associations

Rating

Surface temperature and synthetic spectral energy distributions for rotationally deformed stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Surface temperature and synthetic spectral energy distributions for rotationally deformed stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface temperature and synthetic spectral energy distributions for rotationally deformed stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-699059