An Ephemeris for the Pre-Cataclysmic Binary EUVE J0720-317

Details An Ephemeris for the Pre-Cataclysmic Binary EUVE J0720-317 An Ephemeris for the Pre-Cataclysmic Binary EUVE J0720-317

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112..284v&link_type=abstract

Astronomical Journal v.112, p.284

Astronomy and Astrophysics

Astronomy

11

Cataclysmic Variables, Stars: Euve J0720-317

Scientific paper

We present Hα radial velocities and equivalent widths of the hot white dwarf plus red dwarf binary EUVE J0720-317, which cover a 621 day baseline without cycle-count ambiguities and define an orbital period of 1.26245±0.00004 d. The equivalent width variation lags the radial velocity by 0.21±0.02, consistent with an expected 0.25-cycle offset if the emission arises entirely from reprocessing of the white dwarf's EUV radiation in the red dwarf upper atmosphere. Moreover, using our new ephemeris we show that photometric variations reported in the literature are strictly in phase with the Balmer line strength variations, providing further support for the EUV-illumination model. We present revised estimates of the component masses and discuss the binary evolutionary status.

Affiliated with

Also associated with

No associations

Rating

An Ephemeris for the Pre-Cataclysmic Binary EUVE J0720-317 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An Ephemeris for the Pre-Cataclysmic Binary EUVE J0720-317, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Ephemeris for the Pre-Cataclysmic Binary EUVE J0720-317 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1116191