A possible CH subdwarf

Details A possible CH subdwarf A possible CH subdwarf

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.299..702c&link_type=abstract

Nature, vol. 299, Oct. 21, 1982, p. 702-704.

Astronomy and Astrophysics

Astronomy

1

Carbon Stars, Dwarf Stars, Giant Stars, Stellar Evolution, Astronomical Photometry, Interstellar Extinction, Stellar Luminosity, Stellar Mass, Stellar Motions, Stellar Spectra

Scientific paper

Photometric data indicating that the stellar object 2C24 of SA 51 is a CH subdwarf are reported. The observations on a photoelectric calibrated photographic photometer showed a V of 18.79, B - V of 0.67, and absolute proper motion with respect to galaxies of 0.001 (within 0.003) arcsec/yr and -0.011 (within 0.002) arcsec/yr for the x and y components. An interstellar extinction of 0.2 mag is adopted and the tangential speed is calculated from photometric parallax. The proper motion of the star suggests a subdwarf, although evidence that it is a metal rich star has been found. It is concluded that further spectrometric observations are necessary to properly classify the star. Mechanisms for the production of CH stars are discussed.

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