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Title: THE GOULD’S BELT VERY LARGE ARRAY SURVEY. II. THE SERPENS REGION

Abstract

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 and 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.

Authors:
; ; ; ; ;  [1];  [2];  [3];  [4];  [5]; ;  [6];  [7];  [8];  [9]
  1. Centro de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de Mexico, Morelia 58089 (Mexico)
  2. National Radio Astronomy Observatory, Domenici Science Operations Center, 1003 Lopezville Road, Socorro, NM 87801 (United States)
  3. Max Planck Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany)
  4. Instituto de Astronomía y Meteorología, Universidad de Guadalajara, Av. Vallarta 2602, Col. Arcos Vallarta, 44130, Guadalajara, Jalisco, México (Mexico)
  5. Division of Physics, Math and Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States)
  6. Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48105 (United States)
  7. Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712-1205 (United States)
  8. Cerro Tololo Interamerican Observatory, Casilla 603, La Serena (Chile)
  9. National Radio Astronomy Observatory, Charlottesville, VA 22903 (United States)
Publication Date:
OSTI Identifier:
22522423
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 805; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CLOUDS; COSMIC RADIO SOURCES; MAGNETIC FIELDS; PROPER MOTION; STAR CLUSTERS; STARS; X RADIATION

Citation Formats

Ortiz-León, Gisela N., Loinard, Laurent, Rodríguez, Luis F., Pech, Gerardo, Rivera, Juana L., González-Lópezlira, Rosa A., Mioduszewski, Amy J., Dzib, Sergio A., Torres, Rosa M., Boden, Andrew F., Hartmann, Lee, Kounkel, Marina A., II, Neal J. Evans, Briceño, Cesar, and Tobin, John, E-mail: g.ortiz@crya.unam.mx. THE GOULD’S BELT VERY LARGE ARRAY SURVEY. II. THE SERPENS REGION. United States: N. p., 2015. Web. doi:10.1088/0004-637X/805/1/9.
Ortiz-León, Gisela N., Loinard, Laurent, Rodríguez, Luis F., Pech, Gerardo, Rivera, Juana L., González-Lópezlira, Rosa A., Mioduszewski, Amy J., Dzib, Sergio A., Torres, Rosa M., Boden, Andrew F., Hartmann, Lee, Kounkel, Marina A., II, Neal J. Evans, Briceño, Cesar, & Tobin, John, E-mail: g.ortiz@crya.unam.mx. THE GOULD’S BELT VERY LARGE ARRAY SURVEY. II. THE SERPENS REGION. United States. doi:10.1088/0004-637X/805/1/9.
Ortiz-León, Gisela N., Loinard, Laurent, Rodríguez, Luis F., Pech, Gerardo, Rivera, Juana L., González-Lópezlira, Rosa A., Mioduszewski, Amy J., Dzib, Sergio A., Torres, Rosa M., Boden, Andrew F., Hartmann, Lee, Kounkel, Marina A., II, Neal J. Evans, Briceño, Cesar, and Tobin, John, E-mail: g.ortiz@crya.unam.mx. Wed . "THE GOULD’S BELT VERY LARGE ARRAY SURVEY. II. THE SERPENS REGION". United States. doi:10.1088/0004-637X/805/1/9.
@article{osti_22522423,
title = {THE GOULD’S BELT VERY LARGE ARRAY SURVEY. II. THE SERPENS REGION},
author = {Ortiz-León, Gisela N. and Loinard, Laurent and Rodríguez, Luis F. and Pech, Gerardo and Rivera, Juana L. and González-Lópezlira, Rosa A. and Mioduszewski, Amy J. and Dzib, Sergio A. and Torres, Rosa M. and Boden, Andrew F. and Hartmann, Lee and Kounkel, Marina A. and II, Neal J. Evans and Briceño, Cesar and Tobin, John, E-mail: g.ortiz@crya.unam.mx},
abstractNote = {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 and 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.},
doi = {10.1088/0004-637X/805/1/9},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 805,
place = {United States},
year = {2015},
month = {5}
}