THE ATACAMA COSMOLOGY TELESCOPE: DYNAMICAL MASSES AND SCALING RELATIONS FOR A SAMPLE OF MASSIVE SUNYAEV-ZEL'DOVICH EFFECT SELECTED GALAXY CLUSTERS

被引：95

作者：

Sifon, Cristobal ^{[1
,2
]}

Menanteau, Felipe ^{[3
]}

Hasselfield, Matthew ^{[4
]}

Marriage, Tobias A. ^{[5
]}

Hughes, John P. ^{[3
]}

Felipe Barrientos, L. ^{[1
]}

Gonzalez, Jorge ^{[1
]}

Infante, Leopoldo ^{[1
]}

Addison, Graeme E. ^{[6
]}

Baker, Andrew J. ^{[3
]}

Battaglia, Nick ^{[7
]}

Bond, J. Richard ^{[7
]}

Crichton, Devin ^{[5
]}

Das, Sudeep ^{[8
,9
]}

Devlin, Mark J. ^{[10
]}

Dunkley, Joanna ^{[6
]}

Duenner, Rolando ^{[1
]}

Gralla, Megan B. ^{[5
]}

Hajian, Amir ^{[7
]}

Hilton, Matt ^{[11
]}

Hincks, Adam D. ^{[7
,12
]}

Kosowsky, Arthur B. ^{[13
]}

Marsden, Danica ^{[14
]}

Moodley, Kavilan ^{[15
]}

Niemack, Michael D. ^{[16
]}

Nolta, Michael R. ^{[7
]}

Page, Lyman A. ^{[12
]}

Partridge, Bruce ^{[17
]}

Reese, Erik D. ^{[10
]}

Sehgal, Neelima ^{[18
]}

Sievers, Jon ^{[7
]}

Spergel, David N. ^{[18
]}

Staggs, Suzanne T. ^{[12
]}

Thornton, Robert J. ^{[10
,19
]}

Trac, Hy ^{[20
]}

Wollack, Edward J. ^{[21
]}

机构：

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

[2] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

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

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

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

[6] Univ Oxford, Subdept Astrophys, Oxford OX1 3RH, England

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

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

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

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

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

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

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

[14] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

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

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

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

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

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

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

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

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 772卷 / 01期

基金：

美国国家科学基金会; 加拿大创新基金会;

关键词：

cosmic background radiation; cosmology: observations; galaxies: clusters: general; galaxies: distances and redshifts; X-RAY-PROPERTIES; VELOCITY DISPERSIONS; OBSERVED GROWTH; PHYSICAL-PROPERTIES; LINEAR-REGRESSION; HUBBLE CONSTANT; RICH CLUSTERS; CD CLUSTERS; HOT-MODEL; 148; GHZ;

D O I：

10.1088/0004-637X/772/1/25

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first dynamical mass estimates and scaling relations for a sample of Sunyaev-Zel'dovich effect (SZE) selected galaxy clusters. The sample consists of 16 massive clusters detected with the Atacama Cosmology Telescope (ACT) over a 455 deg(2) area of the southern sky. Deep multi-object spectroscopic observations were taken to secure intermediate-resolution (R similar to 700-800) spectra and redshifts for approximate to 60 member galaxies on average per cluster. The dynamical masses M-200c of the clusters have been calculated using simulation-based scaling relations between velocity dispersion and mass. The sample has a median redshift z = 0.50 and a median mass M-200c similar or equal to 12 x 10(14) h(70)(-1) M-circle dot with a lower limit M-200c similar or equal to 6 x 10(14)h(70)(-1) M-circle dot, consistent with the expectations for the ACT southern sky survey. These masses are compared to the ACT SZE properties of the sample, specifically, the match-filtered central SZE amplitude (y) over tilde (0), the central Compton parameter y(0), and the integrated Compton signal Y-200c, which we use to derive SZE-mass scaling relations. All SZE estimators correlate with dynamical mass with low intrinsic scatter (less than or similar to 20%), in agreement with numerical simulations. We explore the effects of various systematic effects on these scaling relations, including the correlation between observables and the influence of dynamically disturbed clusters. Using the three-dimensional information available, we divide the sample into relaxed and disturbed clusters and find that similar to 50% of the clusters are disturbed. There are hints that disturbed systems might bias the scaling relations, but given the current sample sizes, these differences are not significant; further studies including more clusters are required to assess the impact of these clusters on the scaling relations.

引用

页数：16

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