Versatile directional searches for gravitational waves with Pulsar Timing Arrays

被引:16
|
作者
Madison, D. R. [1 ,2 ]
Zhu, X. -J. [3 ,4 ]
Hobbs, G. [4 ]
Coles, W. [5 ]
Shannon, R. M. [4 ,6 ]
Wang, J. B. [7 ]
Tiburzi, C. [8 ,9 ,10 ,11 ]
Manchester, R. N. [4 ]
Bailes, M. [12 ]
Bhat, N. D. R. [6 ]
Burke-Spolaor, S. [13 ]
Dai, S. [4 ,14 ]
Dempsey, J. [15 ]
Keith, M. [16 ]
Kerr, M. [4 ]
Lasky, P. [17 ,18 ]
Levin, Y. [17 ]
Oslowski, S. [10 ,11 ]
Ravi, V. [19 ]
Reardon, D. [4 ,17 ]
Rosado, P. [12 ]
Spiewak, R. [20 ]
van Straten, W. [12 ]
Toomey, L. [4 ]
Wen, L. [3 ]
You, X. [21 ]
机构
[1] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
[2] Natl Radio Astron Observ, Charlottesville, VA 22903 USA
[3] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia
[4] CSIRO Astron & Space Sci, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
[5] Univ Calif San Diego, Elect & Comp Engn, La Jolla, CA 92093 USA
[6] Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia
[7] Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
[8] INAF Osservatorio Astron Cagliari, I-09047 Selargius, CA, Italy
[9] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy
[10] Max Planck Inst Radioastron, D-53121 Bonn, Germany
[11] Univ Bielefeld, Fak Phys, D-33501 Bielefeld, Germany
[12] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
[13] Natl Radio Astron Observ, Socorro, NM 87801 USA
[14] Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
[15] CSIRO Informat Management & Technol IM&T, Dickson, ACT 2602, Australia
[16] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
[17] Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys MoCA, Clayton, Vic 3800, Australia
[18] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia
[19] CALTECH, Pasadena, CA 91125 USA
[20] Univ Wisconsin, Dept Phys, Milwaukee, WI 53201 USA
[21] Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China
基金
澳大利亚研究理事会; 美国国家科学基金会;
关键词
gravitational waves; methods: data analysis; pulsars: general; LIMITS; BURSTS; MEMORY;
D O I
10.1093/mnras/stv2534
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
By regularly monitoring the most stable millisecond pulsars over many years, pulsar timing arrays (PTAs) are positioned to detect and study correlations in the timing behaviour of those pulsars. Gravitational waves (GWs) from supermassive black hole binaries (SMBHBs) are an exciting potentially detectable source of such correlations. We describe a straightforward technique by which a PTA can be 'phased-up' to form time series of the two polarization modes of GWs coming from a particular direction of the sky. Our technique requires no assumptions regarding the time-domain behaviour of a GW signal. This method has already been used to place stringent bounds on GWs from individual SMBHBs in circular orbits. Here, we describe the methodology and demonstrate the versatility of the technique in searches for a wide variety of GW signals including bursts with unmodelled waveforms. Using the first six years of data from the Parkes Pulsar Timing Array, we conduct an all-sky search for a detectable excess of GW power from any direction. For the lines of sight to several nearby massive galaxy clusters, we carry out a more detailed search for GW bursts with memory, which are distinct signatures of SMBHB mergers. In all cases, we find that the data are consistent with noise.
引用
收藏
页码:3662 / 3673
页数:12
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