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HO maser pumping: The effect of quasi-resonance energy transfer in collisions between H and HO molecules.

Authors :
Nesterenok, A.
Varshalovich, D.
Source :
Astronomy Letters; Jul2014, Vol. 40 Issue 7, p425-434, 10p
Publication Year :
2014

Abstract

The effect of quasi-resonance energy transfer in collisions between H and HO molecules in HO maser sources is investigated. New data on the state-to-state rate coefficients for collisional transitions for HO and H molecules are used in the calculations. The results of ortho-HO level population inversion calculations for the 22.2-, 380-, 439-, and 621-GHz transitions are presented. The ortho-HO level population inversion is shown to depend significantly on the population distribution of the para-H J = 0 and 2 rotational levels. The possibility of quasi-resonance energy transfer in collisions between H molecules at highly excited rotational-vibrational levels and HO molecules is considered. The quasi-resonance energy transfer effect can play a significant role in pumping HO masers in the central regions of active galactic nuclei and in star-forming regions. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10637737
Volume :
40
Issue :
7
Database :
Complementary Index
Journal :
Astronomy Letters
Publication Type :
Academic Journal
Accession number :
97029246
Full Text :
https://doi.org/10.1134/S1063773714070068