Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..297s&link_type=abstract
In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 297-300 (SEE N85-20961 1
Astronomy and Astrophysics
Astronomy
Companion Stars, Stellar Spectra, Variable Stars, White Dwarf Stars, Black Body Radiation, Iue, Orbits, Periodic Variations, Ultraviolet Radiation
Scientific paper
Forty eight IUE spectra and 16 archival spectra of the cataclysmic variable TV Col obtained over a 4 year period were analyzed in order to study variability associated with the orbital period of 5.49(h), the photometric period of 5.19(h) and a longer beat period of 4.024 days. Both the short and long time-scale trends are probably complicated by random variability. The most extreme event occurred in November, 1982 when TV Col underwent an unprecedented 2 magnitude continuum outburst in the UV and optical with large increases in the high excitation lines of HII 1640 and NV 1240. The only repetition timescale apparent from all the data appears to be the 4 day beat period. The flux distributions from UV through 2.2 microns can usually be represented by a power law with F(sub)lambda alpha lambda(-2.3) and a black body component with T near 10,000K.
Mateo Mario
Szkody Paula
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