Model atmosphere analyses of post-common envelope stars

Details Model atmosphere analyses of post-common envelope stars Model atmosphere analyses of post-common envelope stars

2002-08-15

arxiv.org/abs/astro-ph/0208291v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures and 1 table. To appear in proceedings of IAU Symp. 210, "Modelling of Stellar Atmospheres", ASP Conference

Scientific paper

Understanding post-common-envelope evolution is important in the studies of close-binary systems. The majority of all interacting binaries with a compact object in their system (e.g. cataclysmic variables, X-ray binaries) are thought to have passed through a common-envelope (CE) phase. Current models of interacting binaries all assume, as a starting point, that there is no significant modification of the secondary star compared with a normal star of similar spectral type. The extent to which the CE significantly alters the composition of the secondary star has yet to be determined. We are studying the M-type secondary in the pre-CV system EG UMa, in order to determine its atmospheric parameters by comparison with synthetic spectra generated using PHOENIX. Absorption lines due to several elements have been used in investigating the stellar parameters of effective temperature, gravity and over elemental abundance. In addition, we are searching for anomalies due to s-process elements (such as Ba, Sr, Rb, Y), which may have been deposited in the atmosphere during the CE stage, and prove that CE evolution has occurred. EG UMa displays strong YO absorption bands, which are normally associated with giants and S stars. These bands may have been formed as a result of an Y-abundance enhancement introduced by the CE, which would be consistent with the observed possible Rb and Sr enrichment.

Affiliated with

Also associated with

No associations

Rating

Model atmosphere analyses of post-common envelope 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 Model atmosphere analyses of post-common envelope stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Model atmosphere analyses of post-common envelope stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-514783