A new light-time effect study of AR Aurigae

Details A new light-time effect study of AR Aurigae A new light-time effect study of AR Aurigae

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003an....324..523a&link_type=abstract

Astronomische Nachrichten, Vol. 324, Issue 6, p. 523-526

Astronomy and Astrophysics

Astronomy

5

Binaries: Eclipsing, Stars: Individual (Ar Aur)

Scientific paper

A period study of the young binary AR Aur based on the extensive series of published photoelectric/ccd minima times indicates the cyclic (O-C) variation for the system. This continuous oscillatory variation covers almost three cycles, about 6000 orbital periods, by the present observational data. It can be attributed to the light-time effect due to a third body with a period of 23.68±0.17 years in the system. The analysis yields a light-time semi-amplitude of 0.0084±0.0002 day and an orbital eccentricity of 0.20±0.04. Adopting the total mass of AR Aur, the mass of the third body assumed in the co-planar orbit with the binary is M3=0.54±0.03 M&sun; and the semimajor axis of its orbit is a3 = 13.0 ± 0.2 AU.

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