DR-21(OH), A Cluster in the Making .1. Observations in Carbon Monosufide and Methanol

Richardson, K.J and Sandell, G. and Cunningham, C.T. and Davies, S.R (1994) DR-21(OH), A Cluster in the Making .1. Observations in Carbon Monosufide and Methanol. Astronomy and Astrophysics, 286 (2). pp. 555-564. ISSN 0004-6361. (The full text of this publication is not available from this repository)

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Abstract

The star formation region DR 21 (OH) was observed in the J=5-4 transitions of CS and (CS)-S-34, and in several J=5-4 transitions of methanol. High velocity wings are detected in CS towards the main DR21(OH) peak, extending over 80 km s-1. They are very faint, and the outer wings are detected only at the centre position. Since the outflow is not seen in the CO J=1-0 or 2-1 transitions, the CS observations suggest that this is a young, compact, dense and hot outflow. Many of the known NH3 cores are also seen in CS and methanol. Three known submm-continuum sources, DR 21 (OH)S, DR 2 1 (OH)SW, and DR 21(OH)NW, are surprisingly faint in the CS J=5-4 line, probably because the gas, though sufficiently dense, is too cold to fully excite the CS J=5-4 transition. They are, however, strong in methanol. An additional source, DR 21 (OH)SE, is strong in CS but weak in methanol. The methanol lines were interpreted with an LTE analysis to estimate rotational temperatures and column densities at the main peaks, and the results discussed in the context of chemical

Item Type: Article
Uncontrolled keywords: ISM, CLOUDS, W-3(OH), JETS AND OUTFLOWS, MOLECULES; RADIO LINES, ISM
Subjects: Q Science > QB Astronomy
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: P. Ogbuji
Date Deposited: 19 Jun 2009 16:07
Last Modified: 30 Jun 2014 13:38
Resource URI: http://kar.kent.ac.uk/id/eprint/19990 (The current URI for this page, for reference purposes)
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