Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-21
Astronomy and Astrophysics
Astrophysics
3 pages, 3 figures, to appear in the proceedings of IAU Symp. No. 240 'Binary Stars as Critical Tools and Tests in Contemporar
Scientific paper
10.1017/S1743921307004310
We have analysed publicly available MACHO observations of 6833 variable stars in the Large Magellanic Cloud, classified as eclipsing binaries. After finding that a significant fraction of the sample was misclassified, we redetermined periods and variability class for all stars, producing a clean sample of 3031 eclipsing binaries. We have investigated their distribution in the period-color-luminosity space, which was used, for example, to assign a foreground probability to every object and establish new period-luminosity relations to selected types of eclipsing stars. We found that the orbital period distribution of LMC binaries is very similar to those of the SMC and the Milky Way. We have also determined the rate of period change for every star using the O-C method, discovering about 40 eclipsing binaries with apsidal motion, 45 systems with cyclic period changes and about 80 stars with parabolic O-C diagrams. In a few objects we discovered gradual amplitude variation, which can be explained by changes in the orbital inclination caused by a perturbing third body in the system.
Bedding Tim R.
Derekas Aliz
Kiss Laszlo L.
No associations
LandOfFree
Eclipsing binaries in the LMC: a wealth of data for astrophysical tests 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 Eclipsing binaries in the LMC: a wealth of data for astrophysical tests, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eclipsing binaries in the LMC: a wealth of data for astrophysical tests will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-337943