Identifying young stellar objects in nine Large Magellanic Cloud star-forming regions

被引:53
作者
Carlson, L. R. [1 ]
Sewilo, M. [2 ]
Meixner, M. [3 ]
Romita, K. A. [4 ]
Lawton, B. [3 ]
机构
[1] Leiden Observ, NL-2300 RA Leiden, Netherlands
[2] Johns Hopkins Univ, Baltimore, MD USA
[3] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[4] Univ Florida, Gainesville, FL USA
关键词
stars: formation; stars: protostars; HII regions; photon-dominated region (PDR); galaxies: star clusters: general; Magellanic Clouds; WOLF-RAYET STARS; H-II COMPLEX; SPECTRAL ENERGY-DISTRIBUTIONS; MASSIVE STARS; INFRARED OBSERVATIONS; INTERSTELLAR COMPLEX; SUPERNOVA-REMNANTS; N159/N160; COMPLEX; MAIN-SEQUENCE; SPITZER VIEW;
D O I
10.1051/0004-6361/201118627
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We introduce a new set of selection criteria for the identification of infrared bright young stellar object (YSO) candidates and apply them to nine HII regions in the Large Magellanic Cloud (LMC), focusing particularly on lower mass candidates missed by most surveys. Data are from the Spitzer Space Telescope legacy program SAGE (Surveying the Agents of Galaxy Evolution; Meixner et al. 2006, AJ, 132, 2268), combined with optical photometry from the Magellanic Clouds Photometric Survey (MCPS; Zaritsky et al. 1997, AJ, 114, 1002) and near-infrared photometry from the InfraRed Survey Facility (IRSF; Kato et al. 2007, PASJ, 59, 615). We choose regions of diverse physical size, star formation rates (SFRs), and ages. We also cover a wide range of locations and surrounding environments in the LMC. These active star-forming regions are LHA 120-N 11, N 44, N 51, N 105, N 113, N 120, N 144, N 160, and N 206. Some have been well-studied (e. g., N11, N44, N160) in the past, while others (e. g., N51, N144) have received little attention. We identify 1045 YSO candidates, including 918 never before identified and 127 matching previous candidate lists. We characterize the evolutionary stage and physical properties of each candidate using the spectral energy distribution (SED) fitter of Robitaille et al. (2007, ApJS, 169, 328) and estimate mass functions and SFRs for each region.
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页数:22
相关论文
共 83 条
[1]  
Ambrocio-Cruz P, 1998, ASTRON ASTROPHYS, V339, P173
[2]   Active star formation in the N11B nebula in the Large Magellanic Cloud:: A sequential star formation scenario confirmed [J].
Barbá, RH ;
Rubio, M ;
Roth, MR ;
García, J .
ASTRONOMICAL JOURNAL, 2003, 125 (04) :1940-1957
[3]  
Bernasconi PA, 1996, ASTRON ASTROPHYS, V307, P829
[4]   Integrated UBV photometry of 624 star clusters and associations in the Large Magellanic Cloud [J].
Bica, E ;
Claria, JJ ;
Dottori, H ;
Santos, JFC ;
Piatti, AE .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1996, 102 (01) :57-73
[5]   The fourth catalogue of Population I Wolf-Rayet stars in the Large Magellanic Cloud [J].
Breysacher, J ;
Azzopardi, M ;
Testor, G .
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 137 (01) :117-145
[6]   Observations of ground-state OH in the Large Magellanic Cloud [J].
Brooks, KJ ;
Whiteoak, JB .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 291 (03) :395-402
[7]   A PANCHROMATIC VIEW OF NGC 602: TIME-RESOLVED STAR FORMATION WITH THE HUBBLE AND SPITZER SPACE TELESCOPES [J].
Carlson, Lynn Redding ;
Sewilo, Marta ;
Meixner, Margaret ;
Romita, Krista Alexandra ;
Whitney, Barbara ;
Hora, J. L. ;
Cignoni, M. ;
Sabbi, Elena ;
Nota, Antonella ;
Sirianni, Marco ;
Smith, Linda J. ;
Gordon, Karl ;
Babler, B. ;
Bracker, S. ;
Gallagher, J. S., III ;
Meade, M. ;
Misselt, K. ;
Pasquali, A. ;
Shiao, B. .
ASTROPHYSICAL JOURNAL, 2011, 730 (02)
[8]   SPITZER VIEW OF YOUNG MASSIVE STARS IN THE LARGE MAGELLANIC CLOUD H II COMPLEXES. II. N 159 [J].
Chen, C. -H. Rosie ;
Indebetouw, Remy ;
Chu, You-Hua ;
Gruendl, Robert A. ;
Testor, Gerard ;
Heitsch, Fabian ;
Seale, Jonathan P. ;
Meixner, Margaret ;
Sewilo, Marta .
ASTROPHYSICAL JOURNAL, 2010, 721 (02) :1206-1232
[9]   SPITZER VIEW OF YOUNG MASSIVE STARS IN THE LARGE MAGELLANIC CLOUD H II COMPLEX N 44 [J].
Chen, C. -H. Rosie ;
Chu, You-Hua ;
Gruendl, Robert A. ;
Gordon, Karl D. ;
Heitsch, Fabian .
ASTROPHYSICAL JOURNAL, 2009, 695 (01) :511-541
[10]   Protostars, dust globules, and a Herbig-Haro object in the LMC superbubble N51D [J].
Chu, YH ;
Gruendl, RA ;
Chen, CHR ;
Whitney, BA ;
Gordon, KD ;
Looney, LW ;
Clayton, GC ;
Dickel, JR ;
Dunne, BC ;
Points, SD ;
Smith, RC ;
Williams, RM .
ASTROPHYSICAL JOURNAL, 2005, 634 (02) :L189-L192