Ultraviolet variation of the AP star 21 COM

Details Ultraviolet variation of the AP star 21 COM Ultraviolet variation of the AP star 21 COM

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980esasp.157...31g&link_type=abstract

The second European International Ultraviolet Explorer (IUE) Conference, held 26-28 March 1980 in Tübingen, West Germany. Edited

Astronomy and Astrophysics

Astronomy

3

Emission Spectra, Iue, Variable Stars, A Stars, Calcium, Light Curve, Periodic Variations, Ultraviolet Astronomy

Scientific paper

Low resolution UV spectra were taken in long and short wavelength regions covering one cycle of the star (period about one day). Large flux variations were found at wavelengths shorter than 2000 A, which vanish at longer wavelengths. High and low resolution spectra were compared to examine the possibility that 21 Com is an emission star, but results suggest that the observed flux maximum at lambda 1951 A is not due to an emission of Ca III as had been suggested.

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