Is the changing orbital period of EXO 0748-676 evidence for a triple system?

Details Is the changing orbital period of EXO 0748-676 evidence for a triple system? Is the changing orbital period of EXO 0748-676 evidence for a triple system?

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...436l..15c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 436, no. 1, p. L15-L18

Astronomy and Astrophysics

Astronomy

15

Eclipsing Binary Stars, Stellar Orbits, Triple Stars, X Ray Binaries, Companion Stars, Neutron Stars, Spaceborne Astronomy

Scientific paper

We present eclipse timing measurements of the low-mass X-ray binary (LMxB) EXO 0748-676 made with ASCA. These measurements, when combined with previous results, are consistent with the hypothesis that eclipse times are modulated by a third body. The parameters of the orbit of the postulated third body are now apparently well constrained and will allow further observations to effectively test the hypothesis that EXO 0748-676 is a triple system. The derived orbital parameters are such that, unless the inclination angle is very low, a third body in the system must have a mass less than the lower limit for a main-sequence star.

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