Suresh,Akshaya1; Dunham,Michael M.2; Arce,Héctor G.1; II,Neal J. Evans3; Bourke,Tyler L.2,4; Merello,Manuel5; Wu,Jingwen6
Source PublicationThe Astronomical Journal
AbstractABSTRACT We present a catalog of low-mass dense cores observed with the SHARC-II instrument at 350 μm. Our observations have an effective angular resolution of 10″, approximately 2.5 times higher than observations at the same wavelength obtained with the Herschel Space Observatory, albeit with lower sensitivity, especially to extended emission. The catalog includes 81 maps covering a total of 164 detected sources. For each detected source, we tabulate basic source properties including position, peak intensity, flux density in fixed apertures, and radius. We examine the uncertainties in the pointing model applied to all SHARC-II data and conservatively find that the model corrections are good to within ~3″, approximately 1/3 of the SHARC-II beam. We examine the differences between two array scan modes and find that the instrument calibration, beam size, and beam shape are similar between the two modes. We also show that the same flux densities are measured when sources are observed in the two different modes, indicating that there are no systematic effects introduced into our catalog by utilizing two different scan patterns during the course of taking observations. We find a detection rate of 95% for protostellar cores but only 45% for starless cores, and demonstrate the existence of a SHARC-II detection bias against all but the most massive and compact starless cores. Finally, we discuss the improvements in protostellar classification enabled by these 350?μm observations.
KeywordISM: clouds stars: formation stars: low-mass submillimeter: ISM
WOS IDIOP:0004-6256-152-2-36
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520, USA
2.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 78, Cambridge, MA 02138, USA;
3.Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712-1205, USA
4.SKA Organization, Jodrell Bank Observatory, Lower Withington, Macclesfield, Cheshire SK11 9DL, UK
5.Istituto di Astrofisica e Planetologia Spaziali-INAF, Via Fosso del Cavaliere 100, I-00133 Roma, Italy
6.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China
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GB/T 7714
Suresh,Akshaya,Dunham,Michael M.,Arce,Héctor G.,et al. A CATALOG OF LOW-MASS STAR-FORMING CORES OBSERVED WITH SHARC-II AT 350 μm[J]. The Astronomical Journal,2016,152(2).
APA Suresh,Akshaya.,Dunham,Michael M..,Arce,Héctor G..,II,Neal J. Evans.,Bourke,Tyler L..,...&Wu,Jingwen.(2016).A CATALOG OF LOW-MASS STAR-FORMING CORES OBSERVED WITH SHARC-II AT 350 μm.The Astronomical Journal,152(2).
MLA Suresh,Akshaya,et al."A CATALOG OF LOW-MASS STAR-FORMING CORES OBSERVED WITH SHARC-II AT 350 μm".The Astronomical Journal 152.2(2016).
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