Ground-based and IUE spectral observations of AU Monocerotis

Details Ground-based and IUE spectral observations of AU Monocerotis Ground-based and IUE spectral observations of AU Monocerotis

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..113s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Feb. 1982, p. 113-121.

Astronomy and Astrophysics

Astronomy

18

Eclipsing Binary Stars, H Alpha Line, Iue, Radial Velocity, Stellar Spectrophotometry, Subgiant Stars, Ultraviolet Spectroscopy, Absorption Spectra, Emission Spectra, Shock Wave Propagation, Space Observations (From Earth), Stellar Envelopes, Stellar Mass Ejection

Scientific paper

Results of ground-based and IUE spectral observations of the close binary AU Monocerotis made in January 1979, are reported. The ground-based observations made in the spectral regions 3600-4500 and 4900-7200 A show radial velocities and H-alpha emission suggestive of radial outflow from a subgiant component at high velocities, and from a B5 primary surrounded by a gaseous ring at lower velocities. IUE images, taken at phases 0.5 and 0.66, exhibit only absorption lines of varying widths and a large range in excitation, which suggests the presence of a source of nonthermal energy in the system, probably arising from the dissipation of shock waves in the mass outflow.

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