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Young stellar objects and triggered star formation in the vulpecula ob association

Billot, N. and Noriega-Crespo, A. and Carey, S. and Guieu, S. and Shenoy, S. and Paladini, R. and Latter, W. (2010) Young stellar objects and triggered star formation in the vulpecula ob association. Astrophysical Journal, 712 (2). pp. 797-812. ISSN 0004-637X.

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The Vulpecula OB association, VulOB1, is a region of active star formation located in the Galactic plane at 2.3 kpc from the Sun. Previous studies suggest that sequential star formation is propagating along this 100 pc long molecular complex. In this paper, we use Spitzer MIPSGAL and GLIMPSE data to reconstruct the star formation history of VulOB1, and search for signatures of past triggering events. We make a census of young stellar objects (YSOs) in Vul OB1 based on IR color and magnitude criteria, and we rely on the properties and nature of these YSOs to trace recent episodes of massive star formation. We find 856 YSO candidates, and show that the evolutionary stage of the YSO population in Vul OB1 is rather homogeneous—ruling out the scenario of propagating star formation. We estimate the current star formation efficiency to be ~8%. We also report the discovery of a dozen pillar-like structures, which are confirmed to be sites of small scale triggered star formation.

Item Type:Article
Related URLs:
URLURL TypeDescription
Noriega-Crespo, A.0000-0002-6296-8960
Carey, S.0000-0002-0221-6871
Paladini, R.0000-0002-5158-243X
Additional Information:© 2010 The American Astronomical Society. Received 2009 November 16; accepted 2010 February 5; published 2010 March 8. The authors thank S. Bontemps for providing the extinction map of Vul OB1. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The Virginia Tech Spectral-Line Survey (VTSS) is supported by the National Science Foundation. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This research has made use of the NASA/ IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Facilities: Spitzer
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:Hii regions infrared: ISM infrared: stars, stars: formation stars: pre-main sequence
Issue or Number:2
Classification Code:PACS: 97.10.Bt; 98.20.Af; 97.21.+a; 98.38.Hv; 95.85.Gn; 98.38.Dq
Record Number:CaltechAUTHORS:20100331-112817584
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17830
Deposited By: Ruth Sustaita
Deposited On:02 Apr 2010 21:55
Last Modified:09 Mar 2020 13:19

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