An emission-line proper-motion star, GD 552

Details An emission-line proper-motion star, GD 552 An emission-line proper-motion star, GD 552

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pasp...90..460g&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 90, Aug.-Sept. 1978, p. 460-462.

Astronomy and Astrophysics

Astronomy

8

Balmer Series, Parallax, Stellar Motions, Stellar Spectrophotometry, White Dwarf Stars, Emission Spectra, H Lines, Stellar Mass Accretion

Scientific paper

An emission-line blue star of small proper motion, GD 552, has been found among the suspected white dwarfs of the Lowell lists. It has a nearly flat continuum and strong Balmer emission lines, about 2000 km/s in width. Lowell photographs do not show any large variability, yet its spectrum resembles that of an old nova or U Gem star. It is interpreted as a white dwarf with a weak accretion disk, each contributing about one-half the light. Its absolute magnitude is about + 13, considerably fainter than the normally accepted value for U Gem stars.

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