High-resolution molecular observations of NGC 7538 IRS 1

Details High-resolution molecular observations of NGC 7538 IRS 1 High-resolution molecular observations of NGC 7538 IRS 1

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351..530p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 10, 1990, p. 530-537. Research supported by the University of Il

Astronomy and Astrophysics

Astrophysics

21

H Ii Regions, Molecular Clouds, Planetary Nebulae, Formyl Ions, High Resolution, Interstellar Matter

Scientific paper

This paper presents results of high-resolution (about 3 arcsec) observations of HCN and HCO(+) toward NGC 7538 IRS 1, carried out with the Berkeley-Illinois-Maryland Array and the NRAO 12-m telescope. The J = 1-0 transition of HCO(+) shows an elongated structure extending from the northeast to the southwest. The wings of the HCO(+) line show the blue lobe of an outflow which is in the same direction as the CO outflow in the source. A detailed comparison between individual HCN and HCO(+) emission peaks shows a definite anticorrelation, which is an indication of different mechanisms which excite the two molecules.

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