Microscale structure in the Norma dark cloud

Details Microscale structure in the Norma dark cloud Microscale structure in the Norma dark cloud

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...267..255w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 1, p. 255-259.

Astronomy and Astrophysics

Astrophysics

1

Astronomical Photometry, Cosmic Dust, Interstellar Matter, Molecular Clouds, Dark Matter, Interstellar Extinction

Scientific paper

To investigate the structure of a standard dark cloud like that in the Norma region (l = 325.6 deg, b = 0.13 deg), a photometric and spectral study was undertaken. B-V vs V-3(B-V) diagrams (similar to the more usual E(b-v) vs V0-MV) were built for the stars on the spectral ranges B4-B8, B9-A3, and A4-F5. These diagrams were explained through the building of numerical models which allowed us to obtain some statistical parameters of the microclouds components of the dark region. We found that this standard dark cloud is well represented by microclouds with radii in the range 1 and 2 pc and mean excess between 0.1 and 0.15 magnitudes. The mean density is 8 x 10 exp -3 microclouds pc exp -3.

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