Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...356..609v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 356, June 20, 1990, p. 609-612. Research supported by the Pontificia Univer
Astronomy and Astrophysics
Astrophysics
27
Novae, Statistical Analysis, Variable Stars, Astronomical Spectroscopy, Brightness Distribution, Stellar Luminosity
Scientific paper
This study is based on a sample of 97 well-observed galactic novae. First, a linear relation between eruption amplitude and decay time was determined. The residuals from this relation were analyzed for variations of the luminosities of old novae as a function of the time interval between eruption and observation in quiescence. Between 35 and 10 yr before eruption, a marginal increase in brightness may be present. However, in the last decade, four novae were found in an extremely faint low state. During the first 130 yr after the eruption, galactic novae show a slow decrease in brightness with a slope of 2.1 + or - 0.6 mag per century. The results are interpreted in terms of secular variations of the mass transfer rate as expected from the hibernation model.
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