A CCD survey for faint high-latitude carbon stars

Details A CCD survey for faint high-latitude carbon stars A CCD survey for faint high-latitude carbon stars

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...434..319g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 1, p. 319-329

Astronomy and Astrophysics

Astronomy

30

Carbon Stars, Faint Objects, Galactic Halos, Milky Way Galaxy, Sky Surveys (Astronomy), Astronomical Photometry, Charge Coupled Devices, Galactic Evolution, Galactic Structure, Globular Clusters, Kinematics

Scientific paper

We describe a wide-area CCD survey to search for faint high-latitude carbon (FHLC) stars. Carbon giants provide excellent probes of the structure and kinematics of the outer Galactic halo. We use two-color photometric selection with large-format CCDs to cover 52 sq deg of sky to a depth of about V = 18. Of 94 faint C star candidates from our own CCD survey, one highly ranked V = 17 candidate was found to have a strong carbon and CN bands. We estimate that, to a depth of V = 18, the surface density of FHLC stars is 0.02 deg-2. An updated FHLC sample is used to constrain halo kinematic and structural parameters. Although larger samples are needed, the effective radius of FHLC giants, assuming a de Vancouleurs law distribution, is larger than that for Galactic globular clusters.

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