ESO 439-162/163 - A common proper motion binary formed by a magnetic DQ and a DC type white dwarf

Details ESO 439-162/163 - A common proper motion binary formed by a magnetic DQ and a DC type white dwarf ESO 439-162/163 - A common proper motion binary formed by a magnetic DQ and a DC type white dwarf

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335l..15r&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 335, Dec. 1, 1988, p. L15-L17. Research supported by Universidad

Astronomy and Astrophysics

Astrophysics

8

Binary Stars, Magnetic Stars, Stellar Evolution, White Dwarf Stars, Black Body Radiation, Metallicity, Spectrum Analysis, Stellar Spectrophotometry, Swan Bands

Scientific paper

In the course of a search for faint large proper motion stars, a common proper motion pair was identified having a μ = 0arcsec.38±0arcsec.03 yr-1. The stars are separeted by 23arcsec and have apparent visual magnitudes 18.77 and 19.84, respectively. Spectrophotometry of the stars established that the fainter component is a cold (≡4000K) DC white dwarf, while the brighter one is a magnetic white dwarf with strong Swan bands of C2 shifted and broadened by a ≡108G magnetic field.

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