Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...72..515h&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 72, no. 3, March 1988, p. 515-530.
Astronomy and Astrophysics
Astrophysics
41
Accretion Disks, Cataclysmic Variables, Stellar Mass Accretion, Stellar Spectra, Absorption Spectra, Balmer Series, Emission Spectra, H Lines, Helium, Light Curve, Orbital Elements, Radial Velocity, Spectral Line Width
Scientific paper
A detailed spectroscopic study of the double-lined spectroscopic binary V426 Oph is presented. The orbital period derived from the absorption lines of the late-type secondary star is 0.285314±0.000096 days. Measurements of the Balmer Hβ and Hγ emission lines yield a nominal mass-ratio q = M2/M1 of 0.78±0.06. The late-type spectrum is consistent with that of a K3 dwarf, yielding masses of 0.9±0.2 and 0.7±0.1 M_sun; for the white dwarf and secondary star, respectively, an inclination of 59°±6°, and a distance to the system of 202±33 pc. The behavior of the emission lines is quite complex. Flaring activity is seen in both the continuum and the emission lines. This activity, as well as the anomalous velocity shifts, may be connected with the classification of this dwarf nova as a DQ Her system. However, the broad, double-peaked emission line profiles expected from a simple, rotating disk are often seen, indicating that a disk fills about 70% of the available Roche lobe. The differences between V426 Oph and a very similar dwarf nova, SS Cyg, can be roughly explained using current theories for the behavior of accretion disks and the evolution of such close binary systems.
No associations
LandOfFree
Time-resolved spectroscopy of the cataclysmic variable V426 Ophiuchi 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 Time-resolved spectroscopy of the cataclysmic variable V426 Ophiuchi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-resolved spectroscopy of the cataclysmic variable V426 Ophiuchi will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1670315