Large Area Mapping at 850 Microns. III. Analysis of the Clump Distribution in the Orion B Molecular Cloud

Autor:	Gerald Moriarty-Schieven, George F. Mitchell, M. Fich, Doug Johnstone
Rok vydání:	2001
Předmět:	Physics Molecular cloud Bolometer Astronomy Flux Astronomy and Astrophysics Astrophysics Isothermal process law.invention Correlation function (statistical mechanics) Space and Planetary Science law Exponent SPHERES James Clerk Maxwell Telescope
Zdroj:	The Astrophysical Journal. 559:307-317
ISSN:	1538-4357 0004-637X
Popis:	We present results from a survey of a 900 arcmin2 region of the Orion B molecular cloud, including NGC 2068, NGC 2071, and HH 24/25/26, at 850 μm using the Submillimeter Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope. Following the techniques developed by Johnstone et al., we identify 75 independent objects and compute size, flux, and degree of central concentration. Comparison with isothermal, pressure-confined, self-gravitating Bonnor-Ebert spheres implies that the clumps have internal temperatures of 20-40 K and surface pressures 5.5 1.0 M☉. Significant incompleteness makes determination of the slope at lower masses difficult. The two-point correlation function of the clump separations is measured revealing clustering on size scales r < 1.5 × 105 AU with a radial power-law exponent γ = 0.75.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3c8b77219cf442319310331155bc214c https://doi.org/10.1086/322323 Zobrazit plný text záznamu