The Molecular Core in G34.3+0.2: Millimeter Interferometric Observations of HCO +, H 13CN, HC 15N, and SO
Abstract
This study presents high-resolution observations of the molecular core in the star-forming region G34.3 + 0.2. Maps at 6-arcsec resolution of emission and absorption of the J = 1 - 0 transitions of HCO(+), H (C-13)N, H(C-15)N, and of the 2(2) - 1(1) transition of SO were obtained in addition to a map of the 3.4-mm continuum emission from the compact H II component. The HCL(+) emission toward G34.3 + 0.2 traces a warm molecular core about 0.9 pc in size. Emission from H (C-13)N is detected over about 0.3 pc. The cometary H II region lies near the edge of the molecular core. The blueshift of the radio recombination lines with respect to the molecular emission suggests that gas from the H II region is accelerated in a champagne flow caused by a steep gradient in the ambient gas density.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1992
- DOI:
- 10.1086/170932
- Bibcode:
- 1992ApJ...385..244C
- Keywords:
-
- Carbon Isotopes;
- Formyl Ions;
- Hydrocyanic Acid;
- Microwave Interferometers;
- Molecular Gases;
- Star Formation;
- Sulfur Oxides;
- H Ii Regions;
- High Resolution;
- Interstellar Matter;
- Nitrogen Isotopes;
- Astrophysics;
- ISM: ABUNDANCES;
- ISM: H II REGIONS;
- ISM: INDIVIDUAL ALPHANUMERIC: G34.3;
- 0.2;
- RADIO LINES: MOLECULAR: INTERSTELLAR;
- STARS: FORMATION