OH masers in W 33A

Details OH masers in W 33A OH masers in W 33A

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cha%26a..18..443z&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 18, Issue 4, p. 443-449.

Astronomy and Astrophysics

Astrophysics

1

Interstellar Matter-Maser

Scientific paper

This paper presents observations of OH maser lines of W 33A for the transitions 2Π3/2, J = 3/2, F = 1 --> 1 and F = 2 --> 2. Two models, a thin tube and a sphere, were used for modelling the masing region and a molecular hydrogen density of about 107 cm-3 was obtained. To give a maser photon emission of the order of 1046 s-1, both models require a pump rate of 1 OH cm-3s-1, while the sphere model requires a higher pump efficiency.

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