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An unbiased search for the signatures of protostars in the ? Ophiuchi A molecular cloud I. Near-infrared observations

Khanzadyan, T., Gredel, R., Smith, M.D., Stanke, T. (2004) An unbiased search for the signatures of protostars in the ? Ophiuchi A molecular cloud I. Near-infrared observations. Astronomy and Astrophysics, 426 (1). pp. 171-183. ISSN 0004-6361. (doi:10.1051/0004-6361:20041241) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1051/0004-6361:20041241

Abstract

We present an unbiased search for molecular hydrogen emission in the L1688 cloud within the ? Ophiuchi molecular cloud complex. Our near-infrared survey covers a connected region of extent 35? × 35?. We detect several new H2 flows but the total number of detected outflows is low and is consistent with the paucity of Class 0 and Class 1 sources in the molecular cloud. From the spatial distribution, their collimation and the individual shapes of the bow shocks, we suggest possible candidates for the outflow sources. Most of the candidate driving sources are deeply embedded in dense cores of the molecular cloud. A very young outflow arises from the newly discovered Class 0 source MMS 126. Two major outflows in the NE-SW direction arise from the YLW 15 and YLW 16 Class I sources. Three additional outflows, which both extend over several arcminutes, arise from the Class I sources YLW 31 and YLW 52. Flow directions are generally NE-SW, perpendicular to the elongation directions of the cloud filaments. The apparent extents of molecular flows are related to either the widths of cloud filaments or to the separation between filaments. The estimated jet power needed to continuously drive and excite the detected portions of the shocked H2 outflows lies in the range 0.02-0.2 L?. Given the critical dependence on the environment, however, the total sizes and powers of the outflows may be considerably larger.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361:20041241
Uncontrolled keywords: Ism: clouds, Ism: jets and outflows, Stars: formation
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 11 Aug 2015 09:40 UTC
Last Modified: 29 May 2019 15:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50119 (The current URI for this page, for reference purposes)
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