The molecular emission of the irradiated star forming core ahead of HH 80N
arXiv:0901.4034 · doi:10.1088/0004-637X/695/2/1505
Abstract
We present a Berkeley-Illinois-Maryland Association (BIMA) Array molecular survey of the star forming core ahead of HH 80N, the optically obscured northern counterpart of the Herbig-Haro objects HH 80/81. Continuum emission at 1.4 mm and 8 micron is detected at the center of the core, which confirms the presence of an embedded very young stellar object in the core. All detected molecular species arise in a ring-like structure, which is most clearly traced by CS(2-1) emission. This molecular ring suggests that strong molecular depletion occurs in the inner part of the core (at a radius of ~0.1 pc and densities higher than ~5 x 10^4 cm^{-3}). Despite of the overall morphology and kinematic similarity between the different species, there is significant molecular differentiation along the ring-like structure. The analysis of the chemistry along the core shows that part of this differentiation may be caused by the UV irradiation of the nearby HH 80N object, that illuminates the part of the core facing HH 80N, which results in an abundance enhancement of some of the detected species.
Accepted by ApJ, 27 pages, 7 figures, 4 tables
References in corpus (6)
- A computer program for fast non-LTE analysis of interstellar line spectra
- On the internal structure of starless cores. II. A molecular survey of L1498 and L1517B
- Hot corinos in NGC1333-IRAS4B and IRAS2A
- Water emission in NGC1333-IRAS4: The physical structure of the envelope
- The Initial Conditions for Gravitational Collapse of a Core: An Extremely Young Low-Mass Class 0 Protostar GF9-2
- The L723 low mass star forming protostellar system: resolving a double core
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- Interferometric observations of nitrogen-bearing molecular species in the star-forming core ahead of HH 80N