Photometric Distances to Small Dark Clouds: CB 24

Details Photometric Distances to Small Dark Clouds: CB 24 Photometric Distances to Small Dark Clouds: CB 24

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aj....116..881p&link_type=abstract

The Astronomical Journal, Volume 116, Issue 2, pp. 881-889.

Astronomy and Astrophysics

Astronomy

10

Ism: Dust, Extinction, Ism: Clouds, Ism: Globules, Ism: Individual: Alphanumeric: Cb 24, Stars: Distances, Stars: Formation

Scientific paper

A new method for determining distances to dark clouds and small Bok globules based on broadband optical photometry has been developed. The method exploits the fact that M dwarf stars do not redden into the colors of other main-sequence stars. Consequently, from analysis of color-color diagrams of V-I versus B-V, spectral types and extinctions of faint M dwarf stars located in front of and behind the molecular clouds can be established. For sufficiently deep observations (B ~ 20-24 mag), distances to clouds closer than about 1 kpc can be bracketed to a higher degree of precision (10-40 pc) than previously possible. Photometric data for the Bok globule CB 24 are used in this paper to demonstrate this method, yielding a maximum distance of 360 pc.

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