An episodic red-wing structure of SiIV, lambda 1394A, in gamma CAS

Details An episodic red-wing structure of SiIV, lambda 1394A, in gamma CAS An episodic red-wing structure of SiIV, lambda 1394A, in gamma CAS

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..243d&link_type=abstract

In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 243-248 (SEE N85-20961 1

Astronomy and Astrophysics

Astronomy

1

Absorption Spectra, Hot Stars, Mass Flow Rate, Periodic Variations, Resonance Lines, Silicon, Ultraviolet Spectra, Iue, Stellar Atmospheres, Stellar Coronas, Visible Spectrum

Scientific paper

International Ultraviolet Explorer (IUE) observations of gamma Cas obtained in January 1983 show the conspicuous presence of a red-wing structure in the SiIV, 1394 A, resonance line in gamma Cas. The 1403 A, shows a much less enhanced trace of the same effect. A comparison between 1938 IUE spectra with previous ones obtained in 1980 show that in January 1983 the red absorption wing is strongly depressed relative to the 1980 profile where the red feature was absent. It is concluded that this red wing feature is in absorption rather than in emission. This same wing-structure is suggested on 1982 IUE spectra. Combining long-term variations of gamma Cas in the visual with published far-UV data, it is noted that this red feature seems to occur preferentially at epochs where the V/R ratio of the violet and red emission peaks at H-alpha is less than one. It is suggested that these two characteristics, visual and far UV, are linked to the flow-deceleration in the outer-atmosphere.

Affiliated with

Also associated with

No associations

Rating

An episodic red-wing structure of SiIV, lambda 1394A, in gamma CAS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An episodic red-wing structure of SiIV, lambda 1394A, in gamma CAS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An episodic red-wing structure of SiIV, lambda 1394A, in gamma CAS will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-738415