Indications for the presence of a postmaximum wind of nova V1500 CYG

Details Indications for the presence of a postmaximum wind of nova V1500 CYG Indications for the presence of a postmaximum wind of nova V1500 CYG

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...348..475f&link_type=abstract

Astronomy and Astrophysics, v.348, p.475-478 (1999)

Astronomy and Astrophysics

Astrophysics

3

Line: Profiles, Stars: Individual: V1500 Cyg, Stars: Novae, Cataclysmic Variables

Scientific paper

We have studied spectra of nova V1500 Cyg (1975) shortly after its optical maximum. We find that the very wide red wing of the Hepsilon plus Ca ii H line blend in emission, which was invisible at maximum, appeared a few hours later. What was according to Duerbeck & Wolf (1977) an extremely blue shifted absorption component of Hβ was also seen soon after. These observations can be understood by the presence of a continuously ejected high velocity wind, which became visible during the time of these observations. Somewhat later observations by other observers indicating emission line narrowing, can then be understood as due to a weakening of the wind at such times. The significance of the position of the blue edge of the main absorption component of Hβ and Hdelta is also discussed in relation to the region where this absorption is produced.

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