THE ATACAMA COSMOLOGY TELESCOPE: EXTRAGALACTIC SOURCES AT 148 GHz IN THE 2008 SURVEY

被引：70

作者：

Marriage, Tobias A. ^{[1
]}

Baptiste Juin, Jean ^{[2
]}

Lin, Yen-Ting ^{[1
,2
,3
]}

Marsden, Danica ^{[4
]}

Nolta, Michael R. ^{[5
]}

Partridge, Bruce ^{[6
]}

Ade, Peter A. R. ^{[7
]}

Aguirre, Paula ^{[2
]}

Amiri, Mandana ^{[8
]}

Appel, John William ^{[9
]}

Felipe Barrientos, L. ^{[2
]}

Battistelli, Elia S. ^{[8
,10
]}

Bond, John R. ^{[5
]}

Brown, Ben ^{[11
]}

Burger, Bryce ^{[8
]}

Chervenak, Jay ^{[12
]}

Das, Sudeep ^{[1
,9
,13
,14
]}

Devlin, Mark J. ^{[4
]}

Dicker, Simon R. ^{[4
]}

Doriese, W. Bertrand ^{[15
]}

Dunkley, Joanna ^{[1
,9
,16
]}

Duenner, Rolando ^{[2
]}

Essinger-Hileman, Thomas ^{[9
]}

Fisher, Ryan P. ^{[9
]}

Fowler, Joseph W. ^{[9
]}

Hajian, Amir ^{[1
,5
,9
]}

Halpern, Mark ^{[8
]}

Hasselfield, Matthew ^{[8
]}

Hernandez-Monteagudo, Carlos ^{[17
]}

Hilton, Gene C. ^{[15
]}

Hilton, Matt ^{[18
,19
]}

Hincks, Adam D. ^{[9
]}

Hlozek, Renee ^{[16
]}

Huffenberger, Kevin M. ^{[20
]}

Handel Hughes, David ^{[21
]}

Hughes, John P. ^{[22
]}

Infante, Leopoldo ^{[2
]}

Irwin, Kent D. ^{[15
]}

Kaul, Madhuri ^{[4
]}

Klein, Jeff ^{[4
]}

Kosowsky, Arthur ^{[11
]}

Lau, Judy M. ^{[9
,23
,24
]}

Limon, Michele ^{[4
,9
,25
]}

Lupton, Robert H. ^{[1
]}

Martocci, Krista ^{[9
,26
]}

Mauskopf, Phil ^{[7
]}

Menanteau, Felipe ^{[22
]}

Moodley, Kavilan ^{[18
,19
]}

Moseley, Harvey ^{[12
]}

Netterfield, Calvin B. ^{[27
]}

机构：

[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[2] Pontificia Univ Catolica Chile, Fac Fis, Dept Astron & Astrofis, Santiago 22, Chile

[3] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan

[4] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[5] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada

[6] Haverford Coll, Dept Phys & Astron, Haverford, PA 19041 USA

[7] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[8] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada

[9] Princeton Univ, Joseph Henry Labs Phys, Princeton, NJ 08544 USA

[10] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[11] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[12] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[13] Univ Calif Berkeley, LBL, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA

[14] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[15] NIST Quantum Devices Grp, Boulder, CO 80305 USA

[16] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England

[17] Max Planck Inst Astrophys, D-85741 Garching, Germany

[18] Univ KwaZulu Natal, Sch Math Sci, Astrophys & Cosmol Res Unit, ZA-4041 Durban, South Africa

[19] Ctr High Performance Comp, Cape Town, South Africa

[20] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA

[21] INAOE, Puebla, Mexico

[22] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[23] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA

[24] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[25] Columbia Astrophys Lab, New York, NY 10027 USA

[26] Lab Astrophys & Space Res, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[27] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[28] Univ Barcelona, ICC, E-08028 Barcelona, Spain

[29] Univ Barcelona, ICREA, E-08028 Barcelona, Spain

[30] W Chester Univ, Dept Phys, W Chester, PA 19383 USA

[31] Harvard Univ, Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[32] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 731卷 / 02期

基金：

美国国家科学基金会; 加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

cosmic background radiation; galaxies: active; radio continuum: galaxies; surveys; POWER SPECTRUM; RADIO-SOURCES; GALAXY CLUSTERS; SOURCE COUNTS; ANISOTROPY; SKY; FIELD; SIMULATIONS; VARIABILITY; PREDICTIONS;

D O I：

10.1088/0004-637X/731/2/100

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on extragalactic sources detected in a 455 deg(2) map of the southern sky made with data at a frequency of 148 GHz from the Atacama Cosmology Telescope (ACT) 2008 observing season. We provide a catalog of 157 sources with flux densities spanning two orders of magnitude: from 15 mJy to 1500 mJy. Comparison to other catalogs shows that 98% of the ACT detections correspond to sources detected at lower radio frequencies. Three of the sources appear to be associated with the brightest cluster galaxies of low-redshift X-ray-selected galaxy clusters. Estimates of the radio to millimeter-wave spectral indices and differential counts of the sources further bolster the hypothesis that they are nearly all radio sources, and that their emission is not dominated by re-emission from warm dust. In a bright (> 50 mJy) 148 GHz selected sample with complete cross-identifications from the Australia Telescope 20 GHz survey, we observe an average steepening of the spectra between 5, 20, and 148 GHz with median spectral indices of alpha(5-20) = -0.07 +/- 0.06, alpha(20-148) = -0.39 +/- 0.04, and alpha(5-148) = -0.20 +/- 0.03. When the measured spectral indices are taken into account, the 148 GHz differential source counts are consistent with previous measurements at 30 GHz in the context of a source count model dominated by radio sources. Extrapolating with an appropriately rescaled model for the radio source counts, the Poisson contribution to the spatial power spectrum from synchrotron-dominated sources with flux density less than 20 mJy is C-Sync = (2.8 +/- 0.3) x 10(-6) mu K-2.

引用

页数：15

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