A subdwarf's startling stellar wind

Details A subdwarf's startling stellar wind A subdwarf's startling stellar wind

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225p..33h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, March 15, 1987, p. 33P-38P.

Astronomy and Astrophysics

Astronomy

7

Dwarf Stars, Stellar Spectra, Stellar Winds, Absorption Spectra, Carbon, Nitrogen, Red Shift, Resonance Lines, Silicon

Scientific paper

Selected observations of the subdwarf HD 128220B are presented to illustrate several remarkable properties of its stellar wind. The N V resonance doublet shows a typical P Cygni profile, but the C IV doublet shows a highly structured, strongly variable absorption profile with up to nine discrete velocity components present at any one time. Velocities and column densities are estimated from these data using profile fitting techniques. Some implications of the results are briefly discussed; in particular, the presence of redshifted absorption features is shown to offer a constraint on the subdwarf's mass.

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