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The Gould's Belt Distances Survey (GOBELINS) II. Distances and Structure toward the Orion Molecular Clouds

Kounkel, Marina and Hartmann, Lee and Loinard, Laurent and Ortiz-Leόn, Gisela N. and Mioduszewski, Amy J. and Rodríguez, Luis F. and Dzib, Sergio A. and Torres, Rosa M. and Pech, Gerardo and Galli, Phillip A. B. and Rivera, Juana L. and Boden, Andrew F. and Evans, Neal J., II and Briceño, Cesar and Tobin, John J. (2017) The Gould's Belt Distances Survey (GOBELINS) II. Distances and Structure toward the Orion Molecular Clouds. Astrophysical Journal, 834 (2). Art. No. 142. ISSN 0004-637X.

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We present the results of the Gould's Belt Distances Survey of young star-forming regions toward the Orion Molecular Cloud Complex. We detected 36 young stellar objects (YSOs) with the Very Large Baseline Array, 27 of which have been observed in at least three epochs over the course of two years. At least half of these YSOs belong to multiple systems. We obtained parallax and proper motions toward these stars to study the structure and kinematics of the Complex. We measured a distance of 388 ± 5 pc toward the Orion Nebula Cluster, 428 ± 10 pc toward the southern portion L1641, 388 ± 10 pc toward NGC 2068, and roughly ~420 pc toward NGC 2024. Finally, we observed a strong degree of plasma radio scattering toward λ Ori.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kounkel, Marina0000-0002-5365-1267
Hartmann, Lee0000-0003-1430-8519
Loinard, Laurent0000-0002-5635-3345
Rodríguez, Luis F.0000-0003-2737-5681
Dzib, Sergio A.0000-0001-6010-6200
Galli, Phillip A. B.0000-0003-2271-9297
Rivera, Juana L.0000-0002-7631-2620
Evans, Neal J., II0000-0001-5175-1777
Briceño, Cesar0000-0001-7124-4094
Tobin, John J.0000-0002-6195-0152
Additional Information:© 2017 The American Astronomical Society. Received 2016 July 11; revised 2016 August 26; accepted 2016 September 13; published 2017 January 11. We acknowledge helpful discussions with Mark Reid, which led to testing the possible effects of phase delay in the ONC. G.N.O.-L., L.L., L.F.R., R.A.G.-L.L., G.P., and J.L.R. acknowledge DGAPA, UNAM, and CONACyT, Mexico for financial support. L.L. and G.O. also acknowledge support from von Humboldt Stiftung. N.J.E. was supported by NSF grant AST-1109116 to the University of Texas at Austin. P.A.B.G. acknowledges financial support from FAPESP. The National Radio Astronomy Observatory is operated by Associated Universities, Inc., under cooperative agreement with the NSF. Software: AIPS (Greisen 2003), MPFIT (Markwardt 2009), Skyfield, Binary Star Combined Solution Package (Gudehus 2001).
Funding AgencyGrant Number
Dirección General Asuntos del Personal Académico (DGAPA)UNSPECIFIED
Universidad Nacional Autónoma de México (UNAM)UNSPECIFIED
Consejo Nacional de Ciencia y Tecnología (CONACYT)UNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Sao Paulo (FAPESP)UNSPECIFIED
Subject Keywords:astrometry – ISM: individual objects (Orion Molecular Clouds) – parallaxes – radiation mechanisms: nonthermal – stars: kinematics and dynamics
Issue or Number:2
Record Number:CaltechAUTHORS:20170110-080418591
Persistent URL:
Official Citation:Marina Kounkel et al 2017 ApJ 834 142
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73360
Deposited By: Tony Diaz
Deposited On:10 Jan 2017 16:54
Last Modified:07 Nov 2019 00:12

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