NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Interstellar clouds containing optically thin H2The theory of Black and Delgarno that the relative populations of the excited rotational levels of H2 can be understood in terms of cascading following absorption in the Lyman and Werner bands is employed to infer the gas densities and radiation fields within diffuse interstellar clouds containing H2 that is optically thin in those bands. The procedure is described for computing the populations of the different rotation levels, the relative distribution among the different rotation levels of newly formed H2 is determined on the basis of five simplified models, and the rate of H2 formation is estimated. The results are applied to delta Ori, two components of iota Ori, the second components of rho Leo and zeta Ori, tau Sco, gamma Vel, and zeta Pup. The inferred parameters are summarized for each cloud.
Document ID
19750048033
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jura, M.
(Princeton University New Observatory, Princeton, N.J., United States)
Date Acquired
August 8, 2013
Publication Date
May 1, 1975
Publication Information
Publication: Astrophysical Journal
Volume: 197
Subject Category
Astrophysics
Accession Number
75A32105
Funding Number(s)
CONTRACT_GRANT: NAS5-1810
Distribution Limits
Public
Copyright
Other

Available Downloads

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