Other
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...305..740z&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 305, June 15, 1986, p. 740-758.
Other
96
Cataclysmic Variables, Dwarf Novae, Eclipsing Binary Stars, Light Curve, Stellar Mass Accretion, Stellar Spectrophotometry, Black Body Radiation, Mass Transfer, Morphology, Optical Thickness
Scientific paper
BVR and white-light photometric observations of the eclipsing dwarf nova HT Cas, obtained using a high-speed photometer and photomultiplier tube on the 2.1-m telescope at McDonald Observatory on 15 nights from 1982 through 1984 (a period without eruptions of HT Cas) and on two nights during the eruption of January 1985, are reported and analyzed. The data are presented in extensive tables and graphs, and computer-synthesized cataclysmic-variable light curves are employed in the analysis. At minimum light the HT Cas accretion disk is found to be optically thick, with a temperature distribution like that predicted by steady-state theoretical models and mass flow of about 4 x 10 to the -10th solar mass/yr. From the relatively rapid onset of the January 1985 superoutburst (2 mo after the last steady-state-disk observation) it is inferred that an instability other than that of the accretion disk is involved.
Edward Nather R.
Robinson Emma L.
Zhang Er-Hu
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