Observations of the peculiar object MWC 560 in outburst

Details Observations of the peculiar object MWC 560 in outburst Observations of the peculiar object MWC 560 in outburst

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371..761m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 20, 1991, p. 761-771.

Other

27

Astronomical Photometry, H Alpha Line, Novae, Stellar Winds, Symbiotic Stars, Ultraviolet Spectra, Chromium, High Resolution, Iron, Magnesium, Ophiuchi Clouds, Peculiar Stars

Scientific paper

The results of ultraviolet spectroscopy, photoelectric photometry, and supplemental high-resolution H(alpha) spectroscopy of a photometric outburst of MWC 560 are discussed. Ultraviolet spectra are shown to be consistent with the ejection of an optically thick shell that produced strong absorption blends of Fe II and Cr II. The velocities reported exceed by far those previously found in symbiotic stars or recurrent novas. In addition to the variable high-velocity system of broad absorption features, a relatively stable system of Mg II, Mg I, Fe II, Cr II, and other ionic absorptions is observed. It is pointed out that the spectroscopic phenomena in MWC 560 resemble those found in XX Ophiuchi, but the velocities in the MWC 560 are an order of magnitude higher than those found in XX Oph.

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