NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
IRAS observations of dust heating and energy balance in the Rho Ophiuchi dark cloudThe equilibrium process dust emission in the Rho Ophiuchi dark cloud is studied. The luminosity of the cloud is found to closely match the luminosity of the clouds's known embedded and external radiation sources. There is no evidence for a large population of undetected low-luminosity sources within the cloud and unknown external heating is also only a minor source of energy. Most of the cloud's luminosity is emitted in the mid-to-far-IR. Dust temperature maps indicate that the dust is not hot enough to heat the gas to observed temperatures. A simple cloud model with a radiation field composed of flux HD 147889, S1, and Sco OB2 associations predicts the observed IRAS 60 to 100 micron in-band flux ratios for a mean cloud density n(H2) = 1400. Flattened 12 and 25 micron observations show much extended emission in these bands, suggesting stochastic heating of very small grains or large molecules.
Document ID
19890048877
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Greene, Thomas P.
(Arizona Univ. Tucson, AZ, United States)
Young, Erick T.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 339
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A36248
Funding Number(s)
CONTRACT_GRANT: JPL-957396
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available