Astronomy and Astrophysics – Astronomy
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...553..299p&link_type=abstract
The Astrophysical Journal, Volume 553, Issue 1, pp. 299-306.
Astronomy and Astrophysics
Astronomy
48
Stars: Binaries: General, Stars: Evolution, Stars: Formation, Stars: Pre-Main-Sequence
Scientific paper
Observations of binaries have traditionally provided the means for ascertaining stellar masses. Here we use the published data on eight pre-main-sequence pairs to gauge the accuracy of our own, recently calculated, evolutionary tracks. We consider both eclipsing, double-lined spectroscopic binaries, which provide the mass of each star separately, and noneclipsing, double-lined systems, which yield only the ratio. We also analyze the visual, quadruple system GG Tau, for which the sum of the two component masses follows from observations of the circumbinary disk. In almost all cases, our theoretically derived masses or mass ratios are in good agreement with the empirical values. For two binaries (NTTS 162814-2427 and P1540), the observational results are still too uncertain for a proper comparison. We also find that the derived contraction ages within each pre-main-sequence pair are nearly equal. This result extends earlier findings regarding visual pairs and indicates that the components of all binaries form in proximity, perhaps within the same dense cloud core. Finally, our study reveals that the Trapezium star BM Ori is very young since both the star itself and its companion have contraction ages less than 105 yr.
Palla Francesco
Stahler Steven W.
No associations
LandOfFree
Binary Masses as a Test for Pre-Main-Sequence Tracks 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 Binary Masses as a Test for Pre-Main-Sequence Tracks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Binary Masses as a Test for Pre-Main-Sequence Tracks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-924625