THE QUaD GALACTIC PLANE SURVEY. II. A COMPACT SOURCE CATALOG

Astrophysical Journal, Supplement Series - Tập 195 Số 1 - Trang 8 - 2011
T. Culverhouse1,2, P. A. R. Ade3, L. Bonavera4,5, M. Bowden6,3, Michael L. Brown7, G. Cahill8, P. G. Castro7, S. Church6, Robert Friedman1,2, K. Ganga9, W. K. Gear7, S. Gupta3, J. Hinderks10, C. L. Kuo11, A. E. Lange7, E. M. Leitch4,5, S. J. Melhuish7, Y. Memari12, J. A. Murphy8, A. Orlando4, C. Pryke1,2, R. Schwarz1,2, C. O’Sullivan8, L. Piccirillo7, N. Rajguru13, B. Rusholme7, I. Tereno12, K. L. Thompson6, A. H. Turner3, Emily Wu6, M. Zemcov4,5
1Enrico Fermi Institute, University of Chicago, Chicago, IL 60637 USA
2Kavli Institute for Cosmological Physics, Department of Astronomy & Astrophysics,
3School of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA, UK
4California Institute of Technology, Pasadena, CA 91125 USA
5Jet Propulsion Laboratory, Pasadena, CA 91109, USA
6Kavli Institute for Particle Astrophysics and Cosmology and Department of Physics, Stanford University, Stanford, CA, 94305, USA
7(QUaD Collaboration)
8Department of Experimental Physics, National University of Ireland Maynooth, Maynooth, Co. Kildare, Ireland
9Laboratoire APC/CNRS, Bâtiment Condorcet, 10, 75205 Paris Cedex 13, France
10NASA/Goddard Space Flight Center Greenbelt, Maryland 20771 USA
11Harvard Department of Astronomy, Harvard University, Cambridge MA 02138, USA
12Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UK
13Department of Physics and Astronomy, University College London, London WC1E 6BT, UK

Tóm tắt

ABSTRACT We present a catalog of compact sources derived from the QUaD Galactic Plane Survey. The survey covers ∼800 deg2 of the inner galaxy (|b| < 4°) in Stokes I, Q, and U parameters at 100 and 150 GHz, with angular resolutions of 5 and 3.5 arcmin, respectively. Five hundred and twenty-six unique sources are identified in I, of which 239 are spatially matched between frequency bands, with 53 (234) detected at 100 (150) GHz alone; 170 sources are identified as ultracompact H ii regions. Approximating the distribution of total intensity source fluxes as a power law, we find a slope of γ S, 100 = −1.8 ± 0.4 at 100 GHz and γ S, 150 = −2.2 ± 0.4 at 150 GHz. Similarly, the power-law index of the source two-point angular correlation function is γθ, 100 = −1.21 ± 0.04 and γθ, 150 = −1.25 ± 0.04. The total intensity spectral index distribution peaks at α I ∼ 0.25, indicating that dust emission is not the only source of radiation produced by these objects between 100 and 150 GHz; free–free radiation is likely significant in the 100 GHz band. Four sources are detected in polarized intensity P, of which three have matching counterparts in I. Three of the polarized sources lie close to the Galactic center, Sagittarius A*, Sagittarius B2, and the Galactic Radio Arc, while the fourth is RCW 49, a bright H ii region. An extended polarized source, undetected by the source extraction algorithm on account of its ∼0.°5 size, is identified visually, and is an isolated example of large-scale polarized emission oriented distinctly from the bulk Galactic dust polarization.

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Tài liệu tham khảo

Agol, 2000, ApJ, 538, L121, 10.1086/312818

Aitken, 2000, ApJ, 534, L173, 10.1086/312685

Altenhoff, 1979, A&AS, 35, 23

André, 2010, A&A, 518, L102, 10.1051/0004-6361/201014666

Bertin, 1996, A&AS, 117, 393, 10.1051/aas:1996164

Brown, 2009, ApJ, 705, 978, 10.1088/0004-637X/705/1/978

Condon, 1993, AJ, 106, 1095, 10.1086/116707

Crawford, 2010, ApJ, 718, 513, 10.1088/0004-637X/718/1/513

Culverhouse, 2010, ApJ, 723, L78, 10.1088/2041-8205/723/1/L78

Désert, 2008, A&A, 481, 411, 10.1051/0004-6361:20078701

Dickinson, 2007, MNRAS, 379, 297, 10.1111/j.1365-2966.2007.11967.x

Dowell, 1997, ApJ, 487, 237, 10.1086/304577

Dowell, 1998, ApJ, 504, 588, 10.1086/306069

Enoch, 2008, ApJ, 684, 1240, 10.1086/589963

Enoch, 2006, ApJ, 638, 293, 10.1086/498678

Furukawa, 2009, ApJ, 696, L115, 10.1088/0004-637X/696/2/L115

Greaves, 1995, MNRAS, 272, L1, 10.1093/mnras/272.1.L1

Hamaker, 1996, A&AS, 117, 161, 10.1051/aas:1996147

Hennemann, 2010, A&A, 518, L84, 10.1051/0004-6361/201014629

Hildebrand, 1988, QJRAS, 29, 327

Hinderks, 2009, ApJ, 692, 1221, 10.1088/0004-637X/692/2/1221

Hinz, 2009, ApJS, 181, 227, 10.1088/0067-0049/181/1/227

Jones, 2011, AJ, 141, 82, 10.1088/0004-6256/141/3/82

Jones, 2003, Proc. SPIE, 4855, 227, 10.1117/12.459194

Juvela, 2010, A&A, 518, L93, 10.1051/0004-6361/201014619

Law, 2008, ApJS, 177, 255, 10.1086/533587

Leitch, 2002, ApJ, 568, 28, 10.1086/338878

Lis, 1994, ApJ, 424, 189, 10.1086/173882

Macquart, 2006, ApJ, 646, L111, 10.1086/506932

Marrone, 2007, ApJ, 654, L57, 10.1086/510850

Masi, 2006, A&A, 458, 687, 10.1051/0004-6361:20053891

Melia, 2001, ApJ, 553, 146, 10.1086/320644

Muchovej, 2010, ApJ, 716, 521, 10.1088/0004-637X/716/1/521

Netterfield, 2009, ApJ, 707, 1824, 10.1088/0004-637X/707/2/1824

Novak, 1997, ApJ, 487, 320, 10.1086/304576

Olmi, 2009, ApJ, 707, 1836, 10.1088/0004-637X/707/2/1836

Pilbratt, 2010, A&A, 518, L1, 10.1051/0004-6361/201014759

Quataert, 2000, ApJ, 545, 842, 10.1086/317845

Reich, 2000, PASJ, 52, 355, 10.1093/pasj/52.2.355

Rosolowsky, 2010, ApJS, 188, 123, 10.1088/0067-0049/188/1/123

Schuller, 2009, A&A, 504, 415, 10.1051/0004-6361/200811568

Vieira, 2010, ApJ, 719, 763, 10.1088/0004-637X/719/1/763

Villa, 2002, 224

Williams, 2000, 97

Wood, 1989a, ApJ, 340, 265, 10.1086/167390

Wood, 1989b, ApJS, 69, 831, 10.1086/191329

Young, 2006, ApJ, 644, 326, 10.1086/503327

Yusef-Zadeh, 2004, ApJS, 155, 421, 10.1086/425257

Yusef-Zadeh, 1986, ApJ, 310, 689, 10.1086/164719

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Astrophysical Journal, Supplement Series

Tập 195 Số 1

8

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