Near-infrared time-resolved spectroscopy of the cataclysmic variable YY Draconis
- Observatories of the Carnegie Institution, Pasadena, CA (USA) Washington Univ., Seattle (USA)
Time-resolved near-infrared (8100-8600 A) spectrophotometry and Johnson B-band CCD photometry of the cataclysmic binary YY Dra are presented. The spectra show the presence of the Na I doublet in absorption from the secondary, as well as sharp and broad Ca II emission lines. The sharp Ca II emission lines appear to originate on or near the secondary star because they are visible only during superior conjunction of the secondary star, their radial velocities vary in phase with the Na I absorption lines, and their K-velocity is considerably smaller than observed for the Na I lines. The radial velocity variation of the Na I near-infrared doublet yield an orbital period for YY Dra of P = 0.164988 + or - 0.00023 days. A spectral type of dM 4 + or - 1 for the secondary star is deduced based on the strength of its near-infrared spectral features. The distance to YY Dra is 155 + or - 35 pc based on an application of Bailey's method. 56 refs.
- OSTI ID:
- 5757299
- Journal Information:
- Astrophysical Journal; (USA), Vol. 370; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
HIGHLY VARIABLE EXTINCTION AND ACCRETION IN THE JET-DRIVING CLASS I-TYPE YOUNG STAR PTF 10nvg (V2492 Cyg, IRAS 20496+4354)
Intermediate-mass Early-type Disk Galaxies in the Virgo Cluster. II. Near-Infrared Spectra and Evidence for Differences in Evolution
Related Subjects
GENERAL PHYSICS
BINARY STARS
INFRARED SPECTRA
ERUPTIVE VARIABLE STARS
CHARGE-COUPLED DEVICES
DWARF STARS
EMISSION SPECTRA
NEAR INFRARED RADIATION
PHOTOMETRY
RADIAL VELOCITY
SPECTROPHOTOMETRY
SPECTROSCOPY
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
RADIATIONS
SEMICONDUCTOR DEVICES
SPECTRA
STARS
VARIABLE STARS
VELOCITY
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources