Dust and Gas in the Orion Molecular Cloud: Observations of 1-MILLIMETER Continuum and 2-CENTIMETER H_{2}CO Emission

Abstract

view Abstract Citations (55) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dust and Gas in the Orion Molecular Cloud: Observations of 1-MILLIMETER Continuum and 2-CENTIMETER H_{2}CO Emission Harvey, P. M. ; Gatley, I. ; Werner, M. W. ; Elias, J. H. ; Evans, N. J., II ; Zuckerman, B. ; Morris, G. ; Sato, T. ; Litvak, M. M. Abstract The Orion Nebula region has been mapped over a 3' X 6' region in the continuum at 1 mm and in the 2ii 212 transition of H2CO at 2 cm. The similarity of the two maps is strong evidence that the 1-mm radiation originates in the molecular cloud. The column density of hydrogen molecules through the cloud, derived from the R1CO results, is 2 X 1023 cm-2 dust associated with this amount of gas would produce sufficient thermal emission to account for the observed 1-mm continuum radiation. The mass of the region observed is estimated to be 500 M0. The radial velocities and linewidths of the H2CO emission are discussed with respect to collapse, rotation, and turbulence. Subject headings: infrared - molecules, interstellar - Orion Nebula - radio radiation Publication: The Astrophysical Journal Pub Date: April 1974 DOI: 10.1086/181471 Bibcode: 1974ApJ...189L..87H full text sources ADS | data products SIMBAD (4)