Loading...
Please wait, while we are loading the content...
Similar Documents
The Atacama Cosmology Telescope: High-resolution Sunyaev-zel’dovich Array Observations of Act Sze-selected Clusters from the Equatorial Strip
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2013 |
| Abstract | 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 ( 1015 M ), 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 Abell 2631, 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 20% level for some fraction of clusters. Subject headings: X-rays: galaxies: clusters: general – cosmology: observations – cosmic microwave background 1 Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA, 19104, USA 2 Einstein Postdoctoral Fellow 3 Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8019, USA 4 School of Physics and Astronomy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK 5 Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON, M5S 3H8, Canada 6 Departamento de Astronomı́a y Astrofı́sica, Facultad de Fı́sica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile 7 Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ, 08544, USA 8 Berkeley Center for Cosmological Physics, LBL and Department of Physics, University of California, Berkeley, CA 94720, USA 9 NIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO, 80305, USA 10 Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA 11 Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada 12 Department of Physics, University of Miami, Coral Gables, FL, 33124, USA 13 Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, 15260, USA 14 Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Kashiwa, Chiba 277-8568, Japan 15 Dept. of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218-2686, USA 16 Astrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban, 4041, South Africa 17 Department of Physics and Astronomy, Haverford College, Haverford, PA, 19041, USA 18 Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA, 94305-4085, USA 19 Kavli Institute for Cosmological Physics, Laboratory for Astrophysics and Space Research, 5620 South Ellis Ave., Chicago, IL, 60637, USA 20 Department of Physics , West Chester University of Pennsylvania, West Chester, PA, 19383, USA 21 Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA 22 Code 553/665, NASA/Goddard Space Flight Center, Greenbelt, MD, 20771, USA ar X iv :1 10 8. 33 43 v1 [ as tro -p h. C O ] 16 A ug 2 01 1 https://ntrs.nasa.gov/search.jsp?R=20140006619 2020-03-09T14:10:27+00:00Z |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140006619.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
