Circumstellar lines in the spectrum of Eta Canis Majoris

Details Circumstellar lines in the spectrum of Eta Canis Majoris Circumstellar lines in the spectrum of Eta Canis Majoris

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199..691u&link_type=abstract

Astrophysical Journal, vol. 199, Aug. 1, 1975, pt. 1, p. 691-693.

Astronomy and Astrophysics

Astronomy

34

Interstellar Radiation, Line Spectra, Stellar Envelopes, Stellar Spectra, Nebulae, Oao 3, Spaceborne Astronomy, Spectral Line Width

Scientific paper

High-resolution scans made with the U1 and V1 scanners of the Copernicus satellite covering the centers of lines noted from low-resolution scans as possibly circumstellar in origin have been examined for the presence of sharp components. Three components are found to be displaced by about -235 km/s from the line center. They indicate the presence of a cloud moving rapidly out of the star. Other sharp lines due to C II, N I, Mg I, Mg II, Si IV, and Fe II are observed. They originate in a circumstellar shell which is moving with a velocity of about -25 km/s with respect to the star.

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