Search for gravitational wave signals from known pulsars in LIGO-Virgo O3 data using the 5n-vector ensemble method

被引：2
|
作者：
Onofrio, Luca D. ' [1 ]
De Rosa, Rosario [2 ,3 ]
Palomba, Cristiano [1 ]
Leaci, Paola [1 ,4 ]
Piccinni, Ornella J. [5 ]
Sequino, Valeria [2 ,3 ]
Errico, Luciano [2 ,3 ]
Trozzo, Lucia [3 ]
Palfreyman, Jim [6 ]
Mckee, James W. [7 ,8 ]
Meyers, Bradley W. [9 ]
Stairs, Ingrid [1 ,10 ]
Guillemot, Lucas [1 ,2 ,11 ,12 ]
Cognard, Ismael [11 ,12 ]
Theureau, Gilles [1 ,2 ,3 ,11 ,12 ,13 ]
Keith, Michael J. [1 ,4 ,14 ]
Lyne, Andrew [1 ,4 ,14 ]
Flynn, Chris [1 ,5 ,15 ]
Stappers, Ben [1 ,4 ,14 ]
机构：
[1] INFN, Sez Roma, I-00185 Rome, Italy
[2] Univ Napoli Federico II, I-80126 Naples, Italy
[3] INFN, Sez Napoli, I-80126 Naples, Italy
[4] Univ Roma Sapienza, I-00185 Rome, Italy
[5] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Campus UAB, Bellaterra 08193, Barcelona, Spain
[6] Univ Tasmania, Hobart, Tas 7005, Australia
[7] Univ Hull, EA Milne Ctr Astrophys, Cottingham Rd, Kingston Upon Hull HU6 7RX, England
[8] Univ Hull, Ctr Excellence Data Sci Artificial Intelligence &, Cottingham Rd, Kingston Upon Hull HU6 7RX, England
[9] Curtin Univ, Int Ctr Radio Astron Res ICRAR, Bentley, WA 6102, Australia
[10] Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6J 2B1, Canada
[11] Univ Orleans, Lab Phys & Chim Environm & Espace, CNRS, F-45071 Orleans 02, France
[12] Univ Orleans, Univ PSL, Observ Radioastron Nancay, Observ Paris,CNRS, F-18330 Nancay, France
[13] PSL Res Univ, LUTH, Observ Paris, F-92195 Meudon, France
[14] Univ Manchester, Jodrell Bank Ctr Astrophys, Dept Phys & Astron, Manchester M13 9PL, England
[15] OzGrav Swinburne Univ Technol, Melbourne, Vic 3166, Australia
来源：
PHYSICAL REVIEW D | 2023年 / 108卷 / 12期
基金：
加拿大创新基金会; 英国科学技术设施理事会; 加拿大自然科学与工程研究理事会; 澳大利亚研究理事会; 美国国家科学基金会;
关键词：
TIMING PACKAGE; TEMPO2; MODEL;
D O I：
10.1103/PhysRevD.108.122002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The 5n-vector ensemble method is a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability by combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this paper, we apply the 5n-vector ensemble method to the O3 dataset from the LIGO and Virgo detectors considering an ensemble of 201 known pulsars. We find no evidence for a signal from the ensemble and set a 95% credible upper limit on the mean ellipticity assuming a common exponential distribution for the pulsars' ellipticities. Using two independent hierarchical Bayesian procedures, we find upper limits of 1.2 x 10-9 and 2.5 x 10-9 on the mean ellipticity for the 201 analyzed pulsars.
引用
收藏
页数：20
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