Computer Science
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..221c&link_type=abstract
In ESA 3rd European IUE Conf. p 221-223 (SEE N83-11889 02-88)
Computer Science
Continuums, Far Ultraviolet Radiation, Line Spectra, Lyra Constellation, Extreme Ultraviolet Radiation, Mass Transfer, Stellar Luminosity, Ultraviolet Absorption, X Ray Spectra
Scientific paper
Observations of MV Lyrae in states characterized by the presence of emission lines, and by a continuum with absorption features not always visible are discussed. The ultraviolet continuum at minimum is compared with archival observations, taken when the source was in a brighter state. A model of the activity of the star is proposed. At minimum, mass transfer is absent. In the intermediate state, with moderate mass transfer, the system behaves similarly to SS Cyg at minimum. In the high state, the transition from a line emitting phase to a continuum with absorptions should be due to the inner edge of the disk extending down to the white dwarf surface. If this general picture is correct, the X-rays should soften considerably in the high state. Independently of the model, the X-ray and UV observations indicate that the bulk of the luminosity is emitted shortward of the IUE range in the EUV region.
Chiappetti Lucio
Maraschi Laura
Tanzi Enrico G.
Treves Aldo
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