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The Gould's Belt Very Large Array Survey. II. The Serpens Region

Ortiz-Leόn, Gisela N. and Loinard, Laurent and Mioduszewski, Amy J. and Dzib, Sergio A. and Rodríguez, Luis F. and Pech, Gerardo and Rivera, Juana L. and Torres, Rosa M. and Boden, Andrew F. and Hartmann, Lee and Evans, Neal J., II and Briceño, Cesar and Tobin, John J. and Kounkel, Marina A. and González-Lópezlira, Rosa A. (2015) The Gould's Belt Very Large Array Survey. II. The Serpens Region. Astrophysical Journal, 805 (1). Art. No. 9. ISSN 0004-637X.

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We present deep (~17 μJy) radio continuum observations of the Serpens molecular cloud, the Serpens south cluster, and the W40 region obtained using the Very Large Array in its A configuration. We detect a total of 146 sources, 29 of which are young stellar objects (YSOs), 2 of which are BV stars, and 5 more of which are associated with phenomena related to YSOs. Based on their radio variability and spectral index, we propose that about 16 of the remaining 110 unclassified sources are also YSOs. For approximately 65% of the known YSOs detected here as radio sources, the emission is most likely non-thermal and related to stellar coronal activity. As also recently observed in Ophiuchus, our sample of YSOs with X-ray counterparts lies below the fiducial Güdel & Benz relation. Finally, we analyze the proper motions of nine sources in the W40 region. This allows us to better constrain the membership of the radio sources in the region.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Loinard, Laurent0000-0002-5635-3345
Dzib, Sergio A.0000-0001-6010-6200
Rodríguez, Luis F.0000-0003-2737-5681
Rivera, Juana L.0000-0002-7631-2620
Hartmann, Lee0000-0003-1430-8519
Evans, Neal J., II0000-0001-5175-1777
Briceño, Cesar0000-0001-7124-4094
Tobin, John J.0000-0002-6195-0152
Kounkel, Marina A.0000-0002-5365-1267
Additional Information:© 2015 The American Astronomical Society. Received 2014 January 27; accepted 2015 March 12; published 2015 May 13. This work is supported by CONACyT, Mexico, and PAPIIT, UNAM. We thank M. Dunham and L. Allen for providing us with a list of known young stellar objects in the c2d-GB clouds prior to publication, and A. J. Maury for providing data of the Serpens South cluster. The National Radio Astronomy Observatory is operated by Associated Universities, Inc., under cooperative agreement with the National Science Foundation.
Funding AgencyGrant Number
Consejo Nacional de Ciencia y Tecnología (CONACyT)UNSPECIFIED
Subject Keywords:astrometry; magnetic fields; radiation mechanisms: non-thermal; radio continuum: stars; techniques: interferometric
Issue or Number:1
Record Number:CaltechAUTHORS:20150619-090809436
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Official Citation:The Gould's Belt Very Large Array Survey. II. The Serpens Region Gisela N. Ortiz-León et al. 2015 ApJ 805 9
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58369
Deposited By: Jason Perez
Deposited On:19 Jun 2015 21:46
Last Modified:07 Nov 2019 00:40

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