The interstellar extinction towards Selected Area 203 - A distance estimation to the Chamaeleon-Musca dark-clouds complex

Details The interstellar extinction towards Selected Area 203 - A distance estimation to the Chamaeleon-Musca dark-clouds complex The interstellar extinction towards Selected Area 203 - A distance estimation to the Chamaeleon-Musca dark-clouds complex

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...251..581f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 251, no. 2, Nov. 1991, p. 581-586. Research supported by Danish Board for Astr

Astronomy and Astrophysics

Astrophysics

30

Cosmic Dust, Interstellar Extinction, Interstellar Matter, Milky Way Galaxy, Molecular Clouds, Astronomical Photometry, Distance, Stellar Color, Ubv Spectra

Scientific paper

The results of a photometric program aiming to investigate the dust distribution toward the Chameleon-Musca dark-clouds complex are presented. The analysis is based upon four-color uvby and H-beta photometry for 213 stars selected from the Potsdam Spektral-Durchmusterung of the Kapteyn's Selected Area 203. Although the searched area does not cover the full complex, it provides some significant results. The color excess vs distance diagram indicates the presence of obscuring material distributed as in a sheet-like structure, suggesting that the Chameleon-Musca complex could be a unique structure of dark clouds distant by approximately 140 pc from the sun. The assumption that Cha I is embedded in such a structure locates this cloud at the same distance, and analysis of the color excess toward Cha II indicates that this latter cloud lies no farther than 158 +/-40 pc from the sun.

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