SPECTROSCOPY AND PHOTOMETRY OF THE DWARF NOVA BZ URSAE MAJORIS AND THE CV LINEWIDTH K, MASS-RATIO RELATION

Authors
JURCEVIC JS HONEYCUTT RK SCHLEGEL EM WEBBINK RF
Citation
Js. Jurcevic et al., SPECTROSCOPY AND PHOTOMETRY OF THE DWARF NOVA BZ URSAE MAJORIS AND THE CV LINEWIDTH K, MASS-RATIO RELATION, Publications of the Astronomical Society of the Pacific, 106(699), 1994, pp. 481-485
Citations number
48
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
106
Issue
699
Year of publication
1994
Pages
481 - 485
Database
ISI
SICI code
0004-6280(1994)106:699<481:SAPOTD>2.0.ZU;2-W
Abstract
Time-resolved spectroscopy of the dwarf nova BZ Ursae Majoris reveals periodic velocity variations in the hydrogen emission lines with P = 9 7.9 +/- 0.1 min and K = 73 +/- 6 km s-1. CCD photometry over a 16-mont h interval shows three outbursts of about 4 mag with a mean separation of 181 days. The mean FWHM for the Hbeta emission is large, prompting a recalibration of the FWHM/K vs. mass ratio relation, giving a mass ratio (M(RD)/M(WD)) of 0.20 for BZ UMa. The short period, long outburs t interval, and small mass ratio support the suggestion of BZ UMa bein g in the SU Ursae Majoris subclass of dwarf novae.