An unprecedented UV/optical flare in TV Columbae

Details An unprecedented UV/optical flare in TV Columbae An unprecedented UV/optical flare in TV Columbae

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...280..729s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 280, May 15, 1984, p. 729-733.

Astronomy and Astrophysics

Astronomy

42

Flare Stars, Stellar Flares, Stellar Mass Accretion, Stellar Spectra, Ultraviolet Astronomy, White Dwarf Stars, Black Body Radiation, Continuous Spectra, Iue, Line Spectra, Ubv Spectra

Scientific paper

A surprising, 2 mag, short time scale (hr) outburst of TV Col (2A 0526-328) was observed simultaneously at IUE and optical wavelengths in 1982 November. During this 'flare', the IUE emission lines of N v 1240, C IV 1550, and He II 1640, intensified by more than an order of magnitude and developed P Cygni profiles, indicating mass loss. Continuum fits with a power-law plus a blackbody from the UV through the optical showed a steepening of the UV power-law component and an increase in the temperature and size of the blackbody component during the flare activity. This unusual behavior is discussed in terms of an accretion disk instability.

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