THE ATACAMA COSMOLOGY TELESCOPE: HIGH-RESOLUTION SUNYAEV-ZEL'DOVICH ARRAY OBSERVATIONS OF ACT SZE-SELECTED CLUSTERS FROM THE EQUATORIAL STRIP

被引：21

作者：

Reese, Erik D. ^{[1
]}

Mroczkowski, Tony ^{[1
]}

Menanteau, Felipe ^{[2
]}

Hilton, Matt ^{[3
]}

Sievers, Jonathan ^{[4
]}

Aguirre, Paula ^{[5
]}

Appel, John William ^{[6
]}

Baker, Andrew J. ^{[2
]}

Bond, J. Richard ^{[4
]}

Das, Sudeep ^{[6
,7
,8
,9
]}

Devlin, Mark J. ^{[1
]}

Dicker, Simon R. ^{[1
]}

Duenner, Rolando ^{[5
]}

Essinger-Hileman, Thomas ^{[6
]}

Fowler, Joseph W. ^{[9
,10
]}

Hajian, Amir ^{[4
,6
,9
]}

Halpern, Mark ^{[11
]}

Hasselfield, Matthew ^{[11
]}

Hill, J. Colin ^{[9
]}

Hincks, Adam D. ^{[6
]}

Huffenberger, Kevin M. ^{[12
]}

Hughes, John P. ^{[2
]}

Irwin, Kent D. ^{[10
]}

Klein, Jeff ^{[1
]}

Kosowsky, Arthur ^{[13
]}

Lin, Yen-Ting ^{[14
,15
]}

Marriage, Tobias A. ^{[9
,16
]}

Marsden, Danica ^{[1
]}

Moodley, Kavilan ^{[17
]}

Niemack, Michael D. ^{[6
,10
]}

Nolta, Michael R. ^{[4
]}

Page, Lyman A. ^{[6
]}

Parker, Lucas ^{[6
]}

Partridge, Bruce ^{[18
]}

Rojas, Felipe ^{[5
]}

Sehgal, Neelima ^{[19
]}

Sifon, Cristobal ^{[5
]}

Spergel, David N. ^{[9
]}

Staggs, Suzanne T. ^{[6
]}

Swetz, Daniel S. ^{[1
,10
]}

Switzer, Eric R. ^{[1
,20
]}

Thornton, Robert ^{[1
,21
]}

Trac, Hy ^{[22
]}

Wollack, Edward J. ^{[23
]}

机构：

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

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

[3] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

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

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

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

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

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

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

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

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

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

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

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

[15] Acad Sinica, Inst Astron & Astrophys, Taipei 115, Taiwan

[16] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

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

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

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

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

[21] W Chester Univ Penn, Dept Phys, W Chester, PA 19383 USA

[22] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA

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

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 751卷 / 01期

基金：

加拿大创新基金会; 美国国家航空航天局; 美国国家科学基金会;

关键词：

cosmic background radiation; cosmology: observations; galaxies: clusters: general; techniques: interferometric; X-rays: galaxies: clusters; BACKGROUND POWER SPECTRUM; MASSIVE GALAXY CLUSTERS; X-RAY; RADIO-SOURCES; DARK ENERGY; RELATIVISTIC CORRECTIONS; INTRACLUSTER MEDIUM; PRESSURE PROFILE; OBSERVED GROWTH; CROSS-SECTIONS;

D O I：

10.1088/0004-637X/751/1/12

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present follow-up observations with the Sunyaev-Zel'dovich Array (SZA) of optically confirmed galaxy clusters found in the equatorial survey region of the Atacama Cosmology Telescope (ACT): ACT-CL J0022-0036, ACT-CL J2051+0057, and ACT-CL J2337+0016. ACT-CL J0022-0036 is a newly discovered, massive (similar or equal to 10(15) M-circle dot), high-redshift (z = 0.81) cluster revealed by ACT through the Sunyaev-Zel'dovich effect (SZE). Deep, targeted observations with the SZA allow us to probe a broader range of cluster spatial scales, better disentangle cluster decrements from radio point-source emission, and derive more robust integrated SZE flux and mass estimates than we can with ACT data alone. For the two clusters we detect with the SZA we compute integrated SZE signal and derive masses from the SZA data only. ACT-CL J2337+ 0016, also known as A2631, has archival Chandra data that allow an additional X-ray-based mass estimate. Optical richness is also used to estimate cluster masses and shows good agreement with the SZE and X-ray-based estimates. Based on the point sources detected by the SZA in these three cluster fields and an extrapolation to ACT's frequency, we estimate that point sources could be contaminating the SZE decrement at the less than or similar to 20% level for some fraction of clusters.

引用

页数：12

共 28 条

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