AAS 196th Meeting, June 2000
Session 45. Cataclysmic Variable Stars, Old and Young
Display, Wednesday, June 7, 2000, 10:00am-7:00pm, Empire Hall South

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[45.01] Post Common Envelope Binary Stars and the Pre-Cataclysmic Binary PG 1114+187

T. Hillwig, R. K. Honeycutt (Indiana U.), J. Robertson (Arkansas Tech U.)

We present orbit-resolved spectroscopy and orbit-sampled photometry of the binary system PG 1114+187. Both photometry and radial velocity studies reveal a period of P=1.75992 d which is taken to be the orbital period of the binary. Strong modulation of emission line strength with the same period is also present. A preliminary mass ratio, M2/M1\approx 0.7, is found from primary and secondary star radial velocity amplitudes.

No evidence is seen for either an accretion disk or mass transfer, leading to the conclusion that PG 1114+187 is not a cataclysmic variable but is in a pre-CV state, before the initiation of mass transfer. The short orbital period also leads to the conclusion that the system passed through a common envelope phase at some time in the past.

The current list of known Post Common Envelope and Pre-Cataclysmic Binary stars is also reviewed.

If you would like more information about this abstract, please follow the link to http://www.astro.indiana.edu/preprints/thillwig/pg1114.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

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