IUE high-resolution observations of Mira B

Details IUE high-resolution observations of Mira B IUE high-resolution observations of Mira B

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.217..589c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 217, Dec. 1, 1985, p. 589-595.

Astronomy and Astrophysics

Astronomy

6

Binary Stars, Mira Variables, Stellar Spectra, Ultraviolet Spectra, White Dwarf Stars, Carbon, Emission Spectra, Giant Stars, Iue, Line Spectra, Rotating Disks, Silicon, Variable Stars

Scientific paper

A high-resolution spectrum of Mira obtained with IUE on 1983 July 7 confirms the presence of broad emission lines with typical half base widths of ≅300 to roughly 1000 km s-1. No narrow emission lines are detected. The observed broad lines cannot originate from the extended atmosphere of the cool giant variable. The authors show in particular that the intercombination lines of Si III] and C III] are consistent with formation in a rapidly rotating disc around the white-dwarf companion Mira B with typical radius of ≅1011cm, thickness ≅1010cm, and electron density Ne ≅ 1.1×1010cm-3.

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