Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...125..112b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 125, no. 1, Aug. 1983, p. 112-116. Research supported by the Consiglio Naziona
Astronomy and Astrophysics
Astrophysics
23
Accretion Disks, Novae, Stellar Mass Accretion, Stellar Spectra, X Ray Sources, Astronomical Models, Spectral Energy Distribution, Ultraviolet Spectra
Scientific paper
The UV spectrum of the old-nova GK Per (1901) at quiescence greatly differs from those of the other observed old-novae. In spite of the presence of high excitation emission lines, the UV to visual continuum energy distribution is peaked at ≡3600 Å, whereas for most old-novae it steeply rises towards shorter wavelengths. The authors have constructed a grid of models of accretion discs around a magnetic white dwarf for two physically different cases. A modification of the standard disc model in which the inner edge of the disc does not reach the star fails to reproduce the observed X-ray to infrared energy distribution. A better fit is achieved with a disc model whose radial temperature distribution has been changed by the presence of magnetic field lines; an inner radius ≥1.2×109 cm and a mass transfer rate of ≅2×1016 g s-1 are derived.
Bianchini Antonio
Sabadin F.
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