2007MNRAS.382..133W

Query : 2007MNRAS.382..133W

2007MNRAS.382..133W - Mon. Not. R. Astron. Soc., 382, 133-138 (2007/November-3)

The excitation of molecular hydrogen by atomic hydrogen in astrophysical media.

WRATHMALL S.A., GUSDORF A. and FLOWER D.R.

Abstract (from CDS):

We report calculations of rate coefficients for the rovibrational excitation of H2 and HD by H. The calculations relate explicitly to non-reactive scattering, excluding the proton-exchange channels. For vibrationally inelastic transitions, the new rate coefficients at T ~ 1000 K are larger than the results of earlier calculations in which the vibrational motion was treated approximately, by means of a simple harmonic oscillator model. As a result, much better agreement is obtained with the empirical estimates by Allers et al. of the rate coefficients for vibrational relaxation of the levels (v, j) = (1, 3) and (2, 3) of H2. However, the effects of the new data on the results of illustrative astrophysical models - of a C-type shock wave and of the gravitational collapse of a condensation of the primordial gas - are less pronounced than the changes to the rate coefficients for vibrationally inelastic transitions might suggest; we explain why this is the case.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): molecular data - shock waves - ISM: molecules - cosmology: miscellaneous

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 1004 0

Query : 2007MNRAS.382..133W

Basic data :
NAME Orion Bright Bar -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		05 35 22.30 -05 24 33.0 (Optical) [ ] D 2011MNRAS.417..420M
FK4 coord. (ep=B1950 eq=1950) : 		05 32 54.87 -05 26 25.9 [ ]
Gal coord. (ep=J2000) : 		209.04076 -19.37127 [ ]
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NAME Orion Bright Bar NAME Ori Bar NAME Ori Bright Bar NAME Orion Bar

References (1004 between 1850 and 2026) (Total 1004)
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