Test of Weak Equivalence Principle with the Multi-band Timing of the Crab Pulsar

被引:16
作者
Zhang, Yueyang [1 ]
Gong, Biping [1 ]
机构
[1] Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
gravitation; pulsars: individual (the Crab Pulsar); GENERAL-RELATIVITY; RADIO; CONFRONTATION;
D O I
10.3847/1538-4357/aa61fb
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Weak Equivalent Principle (WEP) can be tested through the parameterized post-Newtonian parameter ?, representing the space curvature produced by unit rest mass. The parameter gamma in turn has been constrained by comparing the arrival times of photons originating in distant transient events, such as gamma-ray bursts, fast radio bursts, and giant pulses of pulsars. Those measurements normally correspond to an individual burst event with very limited energy bands and signal-to-noise ratios (S/Ns). In this paper, the discrepancy in the pulse arrival times of the Crab Pulsar between different energy bands is obtained by the phase difference between corresponding pulse profiles. This allows us to compare the pulse arrival times at the largest energy band differences, between radio and optical, radio and X-ray, and radio and gamma-ray respectively. Because the pulse profiles are generated by phase-folding thousands of individual pulses, the time discrepancies between two energy bands are actually measured from thousands of events at each energy band, which corresponds to a much higher S/N. The upper limit of the gamma discrepancy set by such an extensively observed and well-modeled source is as follows: gamma(radio) - gamma(gamma-ray) < 3.28 x 10(-9) at the energy difference of E gamma-ray/E-radio similar to 10(13), gamma(radio) - gamma(X-ray) < 4.01 x 10(-9) at the energy difference of EX-ray/E-radio similar to 10(9), gamma(radio) - gamma(optical) < 2.63 x 10(-9) , at , and at . This actually measures the arrival times of freely falling photons in the gravitational field of the Milky Way with the largest amount of events and with data of the highest S/N, which tests WEP at energy band differences that have never been reached before.
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页数:4
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共 26 条
  • [1] FERMI LARGE AREA TELESCOPE OBSERVATIONS OF THE CRAB PULSAR AND NEBULA
    Abdo, A. A.
    Ackermann, M.
    Ajello, M.
    Atwood, W. B.
    Axelsson, M.
    Baldini, L.
    Ballet, J.
    Barbiellini, G.
    Baring, M. G.
    Bastieri, D.
    Bechtol, K.
    Bellazzini, R.
    Berenji, B.
    Blandford, R. D.
    Bloom, E. D.
    Bonamente, E.
    Borgland, A. W.
    Bregeon, J.
    Brez, A.
    Brigida, M.
    Bruel, P.
    Burnett, T. H.
    Caliandro, G. A.
    Cameron, R. A.
    Camilo, F.
    Caraveo, P. A.
    Casandjian, J. M.
    Cecchi, C.
    Celik, Oe.
    Chekhtman, A.
    Cheung, C. C.
    Chiang, J.
    Ciprini, S.
    Claus, R.
    Cognard, I.
    Cohen-Tanugi, J.
    Cominsky, L. R.
    Conrad, J.
    Dermer, C. D.
    de Angelis, A.
    de Luca, A.
    de Palma, F.
    Digel, S. W.
    Silva, E. do Couto e
    Drell, P. S.
    Dubois, R.
    Dumora, D.
    Espinoza, C.
    Farnier, C.
    Favuzzi, C.
    [J]. ASTROPHYSICAL JOURNAL, 2010, 708 (02) : 1254 - 1267
  • [2] COSMIC TRANSIENTS TEST EINSTEIN'S EQUIVALENCE PRINCIPLE OUT TO GeV ENERGIES
    Gao, He
    Wu, Xue-Feng
    Meszaros, Peter
    [J]. ASTROPHYSICAL JOURNAL, 2015, 810 (02)
  • [3] Aqueye optical observations of the Crab Nebula pulsar
    Germana, C.
    Zampieri, L.
    Barbieri, C.
    Naletto, G.
    Cadez, A.
    Calvani, M.
    Barbieri, M.
    Capraro, I.
    Di Paola, A.
    Facchinetti, C.
    Occhipinti, T.
    Possenti, A.
    Ponikvar, D.
    Verroi, E.
    Zoccarato, P.
    [J]. ASTRONOMY & ASTROPHYSICS, 2012, 548
  • [4] On the identification of merger debris in the Gaia era
    Gomez, Facundo A.
    Helmi, Amina
    Brown, Anthony G. A.
    Li, Yang-Shyang
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 408 (02) : 935 - 946
  • [5] TEMPO2, a new pulsar-timing package - I. An overview
    Hobbs, GB
    Edwards, RT
    Manchester, RN
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 369 (02) : 655 - 672
  • [6] A precise proper motion for the crab pulsar, and the difficulty of testing spin-kick alignment for young neutron stars
    Kaplan, D. L.
    Chatterjee, S.
    Gaensler, B. M.
    Anderson, J.
    [J]. ASTROPHYSICAL JOURNAL, 2008, 677 (02) : 1201 - 1215
  • [7] TEST OF THE WEAK EQUIVALENCE PRINCIPLE FOR NEUTRINOS AND PHOTONS
    KRAUSS, LM
    TREMAINE, S
    [J]. PHYSICAL REVIEW LETTERS, 1988, 60 (03) : 176 - 177
  • [8] Absolute timing with IBIS, SPI and JEM-X aboard INTEGRAL -: Crab main-pulse arrival times in radio, X-rays and high-energy γ-rays
    Kuiper, L
    Hermsen, W
    Walter, R
    Foschini, L
    [J]. ASTRONOMY & ASTROPHYSICS, 2003, 411 (01) : L31 - L36
  • [9] NEW PRECISION TESTS OF THE EINSTEIN EQUIVALENCE PRINCIPLE FROM SN1987A
    LONGO, MJ
    [J]. PHYSICAL REVIEW LETTERS, 1988, 60 (03) : 173 - 175
  • [10] 23 YEARS OF CRAB PULSAR ROTATIONAL HISTORY
    LYNE, AG
    PRITCHARD, RS
    SMITH, FG
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1993, 265 (04) : 1003 - 1012