CE 315: A New Interacting Double‐Degenerate Binary Star
- 10 May 2001
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 552 (2) , 679-684
- https://doi.org/10.1086/320578
Abstract
We present spectroscopic observations of object CE 315 revealing a blue continuum with strong emission lines. Most of the detected lines are identified with He I or He II in emission, with a handful of faint lines of nitrogen. Notable is the complete absence of hydrogen lines. The He lines exhibit triple-peaked profiles with remarkably broad widths of ~2000 km s-1 (FWZP). The observations show that CE 315 is an interacting binary system with an orbital period of 65.1 ± 0.7 minutes and a mass ratio of 0.022. We conclude that the most likely scenario for this object is that of an accreting ~0.77 M☉ white dwarf with a ~0.017 M☉ helium white dwarf as mass donor.Keywords
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