Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aj....133..255l&link_type=abstract
The Astronomical Journal, Volume 133, Issue 1, pp. 255-260.
Astronomy and Astrophysics
Astronomy
3
Binaries: Eclipsing, Stars: Individual: Bd +42 2782
Scientific paper
BD +42 2782 was recently discovered to be a variable star with a W UMa-type, eclipsing-binary light curve. We have obtained the first photoelectric light curves (RC, IC) and also the first radial velocity curves for this binary. These show the system to be a W UMa binary of the W type, with the less massive component eclipsed at primary minimum. The light and velocity curves have been analyzed in a consistent manner using the Wilson-Devinney synthetic light-curve code. The binary has an orbital inclination of 74°, a mass ratio of 0.48, a secondary component ~150 K hotter than the primary, and an overcontact fill-out factor of 34%. Absolute parameters of the component stars are M1=1.38 Msolar, R1=1.29 Rsolar, L1=1.75 Lsolar, and M2=0.67 Msolar, R2=0.95 Rsolar, L2=1.05 Lsolar, and the calculated distance is 124+/-15 pc. Even when corrected for energy transfer between the two components, the more massive component is found to be underluminous for its mass. Several means to explain this are explored, but no completely satisfactory explanation is found.
Hrivnak Bruce J.
Lu Wenxian
Rush Bradley W.
No associations
LandOfFree
Light-Curve and Radial Velocity Study of the Contact Binary BD +42 2782 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 Light-Curve and Radial Velocity Study of the Contact Binary BD +42 2782, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light-Curve and Radial Velocity Study of the Contact Binary BD +42 2782 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1363658