Testing Low-Mass Stellar Models: Three New Detached Eclipsing Binaries below 0.75 Msun
摘要
Full tests to stellar models below 1 Msun have been hindered until now by the scarce number of precise measurements of the stars' most fundamental parameters: their masses and radii. With the current observational techniques, the required precision to distinguish between different models (errors < 2-3 %) can only be achieved using detached eclipsing binaries where 1) both stars are similar in mass, i.e. q = M1/M2 ~ 1.0, and 2) each star is a main sequence object below 1 Msun. Until 2003 only three such binaries had been found and analyzed in detail. Two new systems were published in 2005 (Creevey et al.; Lopez-Morales & Ribas), almost doubling the previous number of data points. Here we present preliminary results for 3 new low-mass detached eclipsing binaries. These are the first studied systems from our sample of over 41 new binaries (Shaw & Lopez-Morales, this proceedings). We also provide an updated comparison between the Mass-Radius and the Mass-Teff relations predicted by the models and the observational data from detached eclipsing binaries.
引用
@article{arxiv.astro-ph/0603748,
title = {Testing Low-Mass Stellar Models: Three New Detached Eclipsing Binaries below 0.75 Msun},
author = {Mercedes Lopez-Morales and J. Scott Shaw},
journal= {arXiv preprint arXiv:astro-ph/0603748},
year = {2007}
}
备注
to appear in the Proceedings of the 7th Pacific Rim Conference on Stellar Astrophysics, November 1--5, 2005, Sejong University, Seoul, Korea, ASP Conference Series, 2006