A Spitzer View of Star Formation in the Cygnus X North Complex

Autor: Joseph L. Hora, S. T. Megeath, Robert A. Gutermuth, Philip W. Lucas, I. M. Beerer, Xavier Koenig, Robert Simon, Eric Keto, Nicola Schneider, Giovanni G. Fazio, Howard A. Smith, Stephan D. Price, Donald R. Mizuno, Frédérique Motte, J. D. Adams, Jesús Hernández, Sean K. Carey, Kathleen E. Kraemer, Sylvain Bontemps, Lori E. Allen
Přispěvatelé: Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Harvard-Smithsonian Center for Astrophysics (CfA), Smithsonian Institution-Harvard University [Cambridge], Bristol Glaciology Centre, School of Geographical Sciences, Science and Technology Research Institute [Hatfield] (STRI), University of Hertfordshire [Hatfield] (UH), Harvard University [Cambridge]-Smithsonian Institution, Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Harvard University-Smithsonian Institution
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2010, 720 (1), pp.679-693. ⟨10.1088/0004-637X/720/1/679⟩
The Astrophysical Journal, 2010, 720 (1), pp.679-693. ⟨10.1088/0004-637X/720/1/679⟩
ISSN: 0004-637X
1538-4357
Popis: We present new images and photometry of the massive star forming complex Cygnus X obtained with IRAC and MIPS on the Spitzer Space Telescope. A combination of IRAC, MIPS, UKIDSS, and 2MASS data are used to identify and classify young stellar objects. Of the 8,231 sources detected exhibiting infrared excess in Cygnus X North, 670 are classified as Class I and 7,249 are classified as Class II. Using spectra from the FAST spectrograph at the Fred L. Whipple Observatory and Hectospec on the MMT, we spectrally typed 536 sources in the Cygnus X complex to identify the massive stars. We find that YSOs tend to be grouped in the neighborhoods of massive B stars (spectral types B0 to B9). We present a minimal spanning tree analysis of clusters in two regions in Cygnus X North. The fraction of infrared excess sources that belong to clusters with >10 members is found to be 50--70%. Most Class II objects lie in dense clusters within blown out HII regions, while Class I sources tend to reside in more filamentary structures along the bright-rimmed clouds, indicating possible triggered star formation.
16 pages, 20 figures, 7 tables, Accepted for publication in the Astrophysical Journal
Databáze: OpenAIRE
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