Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7615960s&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Astronomical Models, Carbon, Nitrogen, Novae, Oxygen, Stellar Mass Ejection, Emission Spectra, Hydrodynamics, Hydrogen, Stellar Envelopes, Stellar Luminosity, Ultraviolet Radiation
Scientific paper
A variety of observations of novae are discussed in light of theoretical models. It is proposed that the nearly constant bolometric luminosity of FH Ser originates in the non-degenerate hydrogen-burning region at the bottom of the hydrogen-rich envelope which remains after the primary ejection. The shift of the wavelength of peak emission from the visual to shortward of the ultraviolet is caused by the decrease of the photospheric radius of the remnant envelope as the bolometric luminosity stays nearly constant. The oscillations in the light curve of GK Per during the transition stage can be explained by a pulsation of the remnant envelope when it is the size of the Roche lobe. The CNO over-abundances in novae reported by various observers are strongly suggestive of this nova mechanism. Finally, the implications of the upper limits of C-13 and N-15 in DQ Her are discussed.
Sparks Warren M.
Starrfield Summer
Truran Jame. W.
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