A spitzer survey of young stellar clusters within one kiloparsec of the sun: cluster core extraction and basic structural analysis
Robert A. Gutermuth,Robert A. Gutermuth,S. T. Megeath,Philip C. Myers,Lori E. Allen,Judith L. Pipher,Giovanni G. Fazio +6 more
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In this article, a uniform mid-infrared imaging and photometric survey of 36 young, nearby, star-forming clusters and groups using Spitzer IRAC and MIPS is presented.Abstract:
We present a uniform mid-infrared imaging and photometric survey of 36 young, nearby, star-forming clusters and groups using Spitzer IRAC and MIPS. We have confidently identified and classified 2548 young stellar objects (YSOs) using recently established mid-infrared color-based methods. We have devised and applied a new algorithm for the isolation of local surface density enhancements from point source distributions, enabling us to extract the overdense cores of the observed star-forming regions for further analysis. We have compiled several basic structural measurements of these cluster cores from the data, such as mean surface densities of sources, cluster core radii, and aspect ratios, in order to characterize the ranges for these quantities. We find that a typical cluster core is 0.39 pc in radius, has 26 members with infrared excess in a ratio of Class II to Class I sources of 3.7, is embedded in a A{sub K} = 0.8 mag cloud clump, and has a surface density of 60 pc{sup -2}. We examine the nearest neighbor distances among the YSOs in several ways, demonstrating similarity in the spacings between Class II and Class I sources but large member clusters appear more dense than smaller clusters. We demonstrate that near-uniform source spacingsmore » in cluster cores are common, suggesting that simple Jeans fragmentation of parsec-scale cloud clumps may be the dominant process governing star formation in nearby clusters and groups. Finally, we compare our results to other similar surveys in the literature and discuss potential biases in the data to guide further interpretation.« lessread more
Citations
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Star Formation in the Milky Way and Nearby Galaxies
TL;DR: In this paper, the authors review progress over the past decade in observations of large-scale star formation, with a focus on the interface between extragalactic and Galactic studies.
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The Disk Population of the Taurus Star-Forming Region
TL;DR: In this paper, the authors analyzed nearly all images of the Taurus star-forming region at 3.6, 4.5, 5.8, 8.0, and 24??m that were obtained during the cryogenic mission of the Spitzer Space Telescope (46 deg2).
Journal ArticleDOI
The Spitzer Space Telescope Survey of the Orion A and B Molecular Clouds. I. A Census of Dusty Young Stellar Objects and a Study of Their Mid-infrared Variability
S. T. Megeath,Robert A. Gutermuth,James Muzerolle,E. Kryukova,Kevin Flaherty,Joseph L. Hora,Lori Allen,Lee Hartmann,Phil Myers,Judy Pipher,John R. Stauffer,Erick T. Young,Giovanni G. Fazio +12 more
TL;DR: In this paper, a survey of the Orion A and B molecular clouds undertaken with the IRAC and MIPS instruments on board Spitzer is presented, which includes the Orion Nebula Cluster, the Lynds 1641, 1630, and 1622 dark clouds, and the NGC 2023, 2024, 2068 and 2071 nebulae.
Journal ArticleDOI
The Spitzer Space Telescope Survey of the Orion A & B Molecular Clouds - Part I: A Census of Dusty Young Stellar Objects and a Study of their Mid-IR Variability
S. T. Megeath,Robert Gutermuth,James Muzerolle,E. Kryukova,K. M. Flaherty,Joseph L. Hora,Lori Allen,Lee Hartmann,Phil Myers,Judy Pipher,John Stauffer,Erick T. Young,G. G. Fazio +12 more
TL;DR: In this article, a survey of the Orion A and B molecular clouds undertaken with the IRAC and MIPS instruments onboard Spitzer is presented, which includes the Orion Nebula Cluster, the Lynds 1641, 1630 and 1622 dark clouds, and the NGC 2023, 2024, 2068 and 2071 nebulae.
Journal ArticleDOI
CSI 2264: SIMULTANEOUS OPTICAL AND INFRARED LIGHT CURVES OF YOUNG DISK-BEARING STARS IN NGC 2264 WITH CoRoT and SPITZER—EVIDENCE FOR MULTIPLE ORIGINS OF VARIABILITY*
Ann Marie Cody,John R. Stauffer,Annie Baglin,Giuseppina Micela,Luisa Rebull,Ettore Flaccomio,Maria Morales-Calderon,Suzanne Aigrain,Jerome Bouvier,Lynne A. Hillenbrand,Robert A. Gutermuth,Inseok Song,Neal J. Turner,Silvia H. P. Alencar,Konstanze Zwintz,Peter Plavchan,John M. Carpenter,Krzysztof Findeisen,Sean Carey,Susan Terebey,Lee Hartmann,Nuria Calvet,Paula S. Teixeira,Frederick J. Vrba,Scott J. Wolk,Kevin R. Covey,Katja Poppenhaeger,Hans Moritz Günther,Jan Forbrich,Jan Forbrich,Barbara Whitney,Laura Affer,William Herbst,Joseph L. Hora,David Barrado,Jon Holtzman,Franck Marchis,Kenneth Wood,M. M. Guimarães,Jorge Lillo Box,Edward Gillen,Amy McQuillan,Catherine Espaillat,Lori Allen,Paola D'Alessio,Fabio Favata +45 more
TL;DR: The Coordinated Synoptic Investigation of NGC 2264 (CSI 2264) as discussed by the authors was a 30-day multi-wavelength photometric monitoring campaign on more than 1000 young star members using 16 telescopes.
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Giovanni G. Fazio,Joseph L. Hora,Lori E. Allen,M. L. N. Ashby,Pauline Barmby,Lynne K. Deutsch,Lynne K. Deutsch,J.-S. Huang,S. C. Kleiner,Massimo Marengo,S. T. Megeath,Gary J. Melnick,Michael A. Pahre,Brian M. Patten,J. Polizotti,Howard A. Smith,R. S. Taylor,Zhong Wang,S. P. Willner,William F. Hoffmann,Judy Pipher,William J. Forrest,C. W. McMurty,Craig R. McCreight,Mark E. McKelvey,Robert E. McMurray,David G. Koch,Samuel H. Moseley,R. G. Arendt,John Eric Mentzell,Catherine T. Marx,P. Losch,P. Mayman,W. Eichhorn,Danny J. Krebs,Murzy D. Jhabvala,Daniel Y. Gezari,D. J. Fixsen,J. Flores,K. Shakoorzadeh,R. Jungo,Claef Hakun,Lois G. Workman,Gabriel Karpati,R. Kichak,R. Whitley,S. Mann,Eric V. Tollestrup,Peter Eisenhardt,Daniel Stern,Varoujan Gorjian,Bidushi Bhattacharya,Sean Carey,Brant O. Nelson,William J. Glaccum,Mark Lacy,Patrick J. Lowrance,Seppo Laine,William T. Reach,J. A. Stauffer,Jason Surace,Gillian Wilson,Edward L. Wright,Alan W. Hoffman,George Domingo,Martin Cohen +65 more
TL;DR: The Infrared Array Camera (IRAC) is one of three focal plane instruments on the Spitzer Space Telescope as mentioned in this paper, which is a four-channel camera that obtains simultaneous broadband images at 3.6, 4.5, 5.8, and 8.0 m.
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The Spitzer Space Telescope mission
Michael W. Werner,Thomas L. Roellig,Frank J. Low,George H. Rieke,Marcia J. Rieke,W. F. Hoffmann,Erick T. Young,James R. Houck,Bernhard R. Brandl,Giovanni G. Fazio,Joseph L. Hora,Robert D. Gehrz,George Helou,B. T. Soifer,John R. Stauffer,Jocelyn Keene,Peter R. Eisenhardt,D. Gallagher,Thomas N. Gautier,William R. Irace,Charles R. Lawrence,L. Simmons,J. van Cleve,Michael Jura,Edward L. Wright,Dale P. Cruikshank +25 more
TL;DR: The Spitzer Space Telescope, NASA's great Observatory for infrared astronomy, was launched 2003 August 25 and is returning excellent scientific data from its Earth-trailing solar orbit as mentioned in this paper.
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