Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...437..545w&link_type=abstract
Astronomy and Astrophysics, Volume 437, Issue 2, July II 2005, pp.545-551
Astronomy and Astrophysics
Astrophysics
12
Stars: Binaries: Eclipsing, Stars: Individual: V539 Ara, Stars: Individual: Gg Lup, Stars: Individual: V526 Sgr, Stars: Individual: Ao Vel, Stars: Fundamental Parameters
Scientific paper
Several new times of minimum light have been observed photoelectricaly for the early-type double-lined eccentric eclipsing binaries V539 Ara (P = 3.2 deg, e = 0.05), GG Lup (1.9 deg, 0.15), V526 Sgr (1.9 deg, 0.22) and AO Vel (1.6 deg, 0.07). The O{-}C diagrams are analysed using all reliable timings found in the literature and improved values for the elements of the apsidal motion are computed. We find more precise, relatively short periods of apsidal motion of about 162, 102, 155 and 54 years for V539 Ara, GG Lup, V526 Sgr and AO Vel, respectively. The corresponding internal structure constants, log k_2, are then found to be 2.33, 2.16, 2.36 and 2.24 under the assumption that the component stars rotate pseudosynchronously. The relativistic effects are negligible, being about 6 7% of the total apsidal motion rate in all systems. Using the light-time effect solution, for V539 Ara we have found a third component orbiting with a period of about 42 years, for AO Vel we confirmed the third body with an orbital period of 33 years.
Wolf Manfred
Zejda Miloslav
No associations
LandOfFree
Apsidal motion in southern eccentric eclipsing binaries: V539 Ara, GG Lup, V526 Sgr and AO Vel 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 Apsidal motion in southern eccentric eclipsing binaries: V539 Ara, GG Lup, V526 Sgr and AO Vel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apsidal motion in southern eccentric eclipsing binaries: V539 Ara, GG Lup, V526 Sgr and AO Vel will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1432551