An Unusual Case of HCN Hyperfine Anomalies in S:76E

Details An Unusual Case of HCN Hyperfine Anomalies in S:76E An Unusual Case of HCN Hyperfine Anomalies in S:76E

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275l...9z&link_type=abstract

Astronomy and Astrophysics, Vol.275, NO. 1/AUG(I), P. L9, 1993

Astronomy and Astrophysics

Astrophysics

3

Stars: Formation, Ism: Clouds, Ism: Molecules, Radio Lines: Interstellar

Scientific paper

The HCN J = 1 - 0 line emission in the region around the H2O maser source S76E demonstrates unusual ratios of the intensities of the hfs components: the F = 1 - 1 component is much stronger than the main F = 2 - 1 component and the other satellite component F = 0 - 1. The most plausible explanation of this anomaly is the shielding of the core emission by a large amount of blue-shifted low density cold molecular gas on the line of sight.

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