Ultraviolet and optical observations of the Cygnus OB2 association: The star 8A

Details Ultraviolet and optical observations of the Cygnus OB2 association: The star 8A Ultraviolet and optical observations of the Cygnus OB2 association: The star 8A

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.218..323g&link_type=abstract

In ESA Fourth European IUE Conf. p 323-324 (SEE N84-35135 24-88)

Physics

Cygnus Constellation, Hot Stars, Stellar Mass Ejection, Stellar Spectra, Balmer Series, Iue, Red Shift, Stellar Winds

Scientific paper

Even if the high reddening of the Cygnus OB2 association makes the observations of its members in the ultraviolet region very difficult, few quite good IUE low resolution spectra of N° 8A star were taken in a couple of years. The most exciting feature of the UV spectra is the very strong C IV resonance line, which shows a clear P Cygni profile. A terminal velocity of the order of 5000 km/s can be estimated. From optical spectra a central depth Ac = 12.9% of the interstellar 4430 Å feature is derived.

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