The mass distribution of dark clouds

Details The mass distribution of dark clouds The mass distribution of dark clouds

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.209...69b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 209, July 1, 1984, p. 69-75.

Astronomy and Astrophysics

Astronomy

17

Mass Distribution, Molecular Clouds, Nebulae, Distribution Functions, Least Squares Method, Milky Way Galaxy, Ophiuchi Clouds

Scientific paper

A mass distribution for dark clouds in various regions is obtained using the Lynds catalog and plausible assumptions regarding the clouds' distances. The distribution for general clouds shows a flattening toward the low mass end, attributed to observational difficulties of detecting all small clouds. The mass function index for general clouds is 1.53. The Orion and Rho Ophiuchi complexes show no flattening at the low mass end, due to their similar distance and the sharp cutoff in observation. Their s-index values are 0.95 and + or - 0.3 and 0.98 + or - 0.3 respectively, while for general clouds it is 1.5 + or - 0.15. This result implies that the number of clouds in a given logarithmic range is independent of mass. The Taurus complex results show flattening at the low-mass end and an s-index of 1.5; these results are surprising since this complex is only 100 pc away.

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