Spectral types of four binaries based on photometric observations

Details Spectral types of four binaries based on photometric observations Spectral types of four binaries based on photometric observations

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008arep...52..729s&link_type=abstract

Astronomy Reports, Volume 52, Issue 9, pp.729-735

Astronomy and Astrophysics

Astronomy

4

97.80.Fk, 97.20.Rp, 95.85.Kr

Scientific paper

We present results of photometric and spectroscopic observations of four close binaries with subdwarf B components: PG 0918+029, PG 1000+408, PG 1116+301, PG 0001+275. We discovered that PG 1000+408 is a close binary, with the most probable orbital period being P orb = 1.041145 day. Based on a comparison of the observed light curves at selected orbital phases and theoretical predictions for their variations, all the systems are classified as doubly degenerate binaries with low-luminosity white-dwarf secondaries.

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