The nature of CD -31 deg 622

Details The nature of CD -31 deg 622 The nature of CD -31 deg 622

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222l.127b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 222, June 15, 1978, p. L127, L128. Research supported by the Estate

Other

4

Abundance, Parallax, Stellar Spectrophotometry, Subdwarf Stars, Stellar Atmospheres, Stellar Motions, Stellar Temperature

Scientific paper

The parallax of CD -31 deg 622 is found to be practically zero from two solutions, one which includes proper motion and another with proper motion removed. Colors are obtained for this star in several photometric systems and are compared with those for a number of comparison stars. The results show that CD -31 deg 622 has a temperature of about 5250 K and a gravity lower than the log g = 4.75 of zero-age halo main-sequence stars, is deficient in metals by at least a factor of 100 with respect to the sun, and has an absolute magnitude that is probably no fainter than +6. The radial velocity is measured as -160 km/s, and the space motions are determined to be U = -41 km/s, V = -28 km/s, and W = +163 km/s.

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