Ultraviolet photometry of Nova Cygni 1975

Details Ultraviolet photometry of Nova Cygni 1975 Ultraviolet photometry of Nova Cygni 1975

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....58..331w&link_type=abstract

Astronomy and Astrophysics, vol. 58, no. 3, June 1977, p. 331-337. Research sponsored by the Koninklijke Nederlandse Akademie v

Astronomy and Astrophysics

Astrophysics

34

Astronomical Photometry, Light Curve, Novae, Ultraviolet Photometry, Variable Stars, Distance, Interstellar Extinction, Stellar Luminosity, Stellar Models

Scientific paper

Nova Cygni 1975 was observed 28 times at 100 days after visual maximum. The ultraviolet observations indicate that it is a variable with a period of 0.140 day. The UV and ground-based light curves suggest a geometrical model similar to that for the dwarf nova U Gem. A B-V color excess of 0.69, a temperature of 65,000 K, and a distance of 1500 pc are estimated. With the above parameters, the luminosities at maximum and 100 days after are 500,000 and 30,000 suns, respectively. Unlike FH Ser, constant luminosity was not maintained for the first 100 days. Furthermore, there is no indication of any appreciable dust formation.

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