Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..102h&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 94, Feb. 1982, p. 102-106.
Astronomy and Astrophysics
Astronomy
12
Dwarf Novae, Emission Spectra, H Beta Line, Stellar Spectrophotometry, Variable Stars, Periodic Variations, Radial Velocity, Radiant Flux Density, Spectral Resolution, Stellar Evolution, Stellar Mass, Stellar Rotation, Temporal Resolution
Scientific paper
Spectrographic data on the dwarf nova RX Andromedae obtained on three consecutive nights when the nova was in a low state is analyzed. The spectra cover 50% of the orbit cycle in the region 3800-5000 A at 1.5-A resolution and time resolution of about 0.03 in phase. Peak radial velocities measured from all line features in all spectra are observed to form a sequence at higher velocities at phases from 0.9 to 0.2. Orbital solutions derived from the radial velocity data indicate a period somewhat shorter than that found by Kraft (1962), suggesting a period change at a rate of 0.000045 per year. Data also reveal no evidence for Kraft's value of 0.40 for the eccentricity. Spectra exhibit late-type secondary features, a wing asymmetry in the H-beta profiles, and certain weak emission features.
Hutchings John B.
Thomas Brian
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