Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.270..804r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 270, NO. 4/OCT15, P. 804, 1994
Astronomy and Astrophysics
Astronomy
10
Scientific paper
A radial velocity study of the Ha emission line of the cataclysmic variable HX Peg = PG 2337+ 123 shows that its orbital period is 0.200810.0005 d (4.82 h). Magnitudes from Harvard College Observatory archive plates suggest that it is either a dwarf nova or a VY Scl star. The quiescent spectrum shows K I 7665, 7699 A in absorption, consistent with the presence of an unusual subdwarf-K mass-losing star. At the beginning of the second night of the run, 0 1 7773 A was in absorption. Near midnight, the continuum rose rapidly into maximum, with time-resolved red spectra taken throughout. This is the second-ever example of time-resolved spectroscopy of a cataclysmic variable's rise from minimum to a high state (after that of Mansperger & Kaitchuck), and the first with red spectra. Key words: accretion, accretion discs - binaries: spectroscopic - stars: individual: HX Peg = PG 2337+ 123 - novae, cataclysmic variables.
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