Legacy ExtraGalactic UV Survey with The Hubble Space Telescope: Stellar Cluster Catalogs and First Insights Into Cluster Formation and Evolution in NGC 628

被引:114
作者
Adamo, A. [1 ]
Ryon, J. E. [2 ,3 ]
Messa, M. [1 ]
Kim, H. [4 ]
Grasha, K. [5 ]
Cook, D. O. [6 ]
Calzetti, D. [5 ]
Lee, J. C. [2 ,7 ]
Whitmore, B. C. [2 ]
Elmegreen, B. G. [8 ]
Ubeda, L. [2 ]
Smith, L. J. [9 ]
Bright, S. N. [2 ]
Runnholm, A. [1 ]
Andrews, J. E. [10 ]
Fumagalli, M. [11 ,12 ]
Gouliermis, D. A. [13 ,14 ]
Kahre, L. [15 ]
Nair, P. [16 ]
Thilker, D. [17 ]
Walterbos, R. [15 ]
Wofford, A. [18 ]
Aloisi, A. [2 ]
Ashworth, G. [11 ,12 ]
Brown, T. M. [2 ]
Chandar, R. [19 ]
Christian, C. [2 ]
Cignoni, M. [20 ,21 ]
Clayton, G. C. [22 ]
Dale, D. A. [23 ]
de Mink, S. E. [24 ]
Dobbs, C. [25 ]
Elmegreen, D. M. [26 ]
Evans, A. S. [27 ,28 ]
Gallagher, J. S., III [3 ]
Grebel, E. K. [29 ]
Herrero, A. [30 ,31 ]
Hunter, D. A. [32 ]
Johnson, K. E. [27 ]
Kennicutt, R. C. [33 ]
Krumholz, M. R. [34 ]
Lennon, D. [35 ]
Levay, K. [2 ]
Martin, C. [6 ]
Nota, A. [9 ]
Ostlin, G. [1 ]
Pellerin, A. [36 ]
Prieto, J. [37 ]
Regan, M. W. [2 ]
Sabbi, E. [2 ]
机构
[1] Stockholm Univ, Oskar Klein Ctr, Dept Astron, AlbaNova Univ Ctr, SE-10691 Stockholm, Sweden
[2] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
[3] Univ Wisconsin Madison, Dept Astron, Madison, WI USA
[4] Gemini Observ, La Serena, Chile
[5] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA
[6] CALTECH, Pasadena, CA 91125 USA
[7] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA
[8] IBM Corp, TJ Watson Res Ctr, Div Res, Yorktown Hts, NY USA
[9] European Space Agcy, Space Telescope Sci Inst, Baltimore, MD USA
[10] Univ Arizona, Dept Astron, Tucson, AZ USA
[11] Univ Durham, Inst Computat Cosmol, Durham, England
[12] Univ Durham, Ctr Extragalact Astron, Dept Phys, Durham, England
[13] Heidelberg Univ, Zentrum Astron, Inst Theoret Astrophys, Albert Ueberle Str 2, D-69120 Heidelberg, Germany
[14] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany
[15] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA
[16] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[17] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[18] Univ Nacl Autonoma Mexico, Inst Astron, Unidad Acad Ensenada, Km 103 Carr Tijuana Ensenada, Ensenada 22860, Baja California, Mexico
[19] Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA
[20] Univ Pisa, Dept Phys, Largo B Pontecorvo 3, I-56127 Pisa, Italy
[21] INFN, Largo B Pontecorvo 3, I-56127 Pisa, Italy
[22] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[23] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA
[24] Univ Amsterdam, Astron Inst Anton Pannekoek, Amsterdam, Netherlands
[25] Univ Exeter, Sch Phys & Astron, Exeter, Devon, England
[26] Vassar Coll, Dept Phys & Astron, Poughkeepsie, NY 12601 USA
[27] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA
[28] Natl Radio Astron Observ, Charlottesville, VA USA
[29] Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany
[30] Inst Astrofis Canarias, Tenerife, Spain
[31] Univ La Laguna, Dept Astrofis, Tenerife, Spain
[32] Lowell Observ, 1400 W Mars Hill Rd, Flagstaff, AZ 86001 USA
[33] Univ Cambridge, Inst Astron, Cambridge, England
[34] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT, Australia
[35] ESA, European Space Astron Ctr, Madrid, Spain
[36] SUNY Coll Geneseo, Dept Phys & Astron, Geneseo, NY 14454 USA
[37] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
[38] Bologna Univ, Dept Phys & Astron, Bologna, Italy
[39] Osservatorio Astron Bologna, INAF, Bologna, Italy
[40] Univ Geneva, Observ Geneve, Geneva, Switzerland
[41] Columbia Univ, Dept Astron, New York, NY 10027 USA
[42] Uppsala Univ, Dept Phys & Astron, Box 515, SE-75120 Uppsala, Sweden
基金
欧洲研究理事会; 英国科学技术设施理事会; 美国国家科学基金会;
关键词
galaxies:; individual; (NGC; 628; M74); galaxies: star clusters: general; galaxies: star formation; stars: formation; HIERARCHICAL STAR-FORMATION; LUMINOSITY FUNCTION; GLOBULAR-CLUSTERS; ADVANCED CAMERA; MASS FUNCTION; AGE DISTRIBUTIONS; FORMATION HISTORY; INTERMEDIATE-AGE; SYNTHESIS MODELS; HII-REGIONS;
D O I
10.3847/1538-4357/aa7132
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report the large effort that is producing comprehensive high-level young star cluster (YSC) catalogs for a significant fraction of galaxies observed with the Legacy ExtraGalactic UV Survey (LEGUS) Hubble treasury program. We present the methodology developed to extract cluster positions, verify their genuine nature, produce multiband photometry (from NUV to NIR), and derive their physical properties via spectral energy distribution fitting analyses. We use the nearby spiral galaxy NGC 628 as a test case for demonstrating the impact that LEGUS will have on our understanding of the formation and evolution of YSCs and compact stellar associations within their host galaxy. Our analysis of the cluster luminosity function from the UV to the NIR finds a steepening at the bright end and at all wavelengths suggesting a dearth of luminous clusters. The cluster mass function of NGC 628 is consistent with a power-law distribution of slopes similar to-2 and a truncation of a few times 10(5) M-circle dot. After their formation, YSCs and compact associations follow different evolutionary paths. YSCs survive for a longer time frame, confirming their being potentially bound systems. Associations disappear on timescales comparable to hierarchically organized star-forming regions, suggesting that they are expanding systems. We find massindependent cluster disruption in the inner region of NGC 628, while in the outer part of the galaxy there is little or no disruption. We observe faster disruption rates for low mass (<= 10(4) M-circle dot) clusters, suggesting that a massdependent component is necessary to fully describe the YSC disruption process in NGC 628.
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页数:26
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