RADIO DETECTION OF LAT PSRs J1741-2054 AND J2032+4127: NO LONGER JUST GAMMA-RAY PULSARS

被引:108
作者
Camilo, F. [1 ]
Ray, P. S. [2 ]
Ransom, S. M. [3 ]
Burgay, M. [4 ]
Johnson, T. J. [5 ,6 ]
Kerr, M. [7 ]
Gotthelf, E. V. [1 ]
Halpern, J. P. [1 ]
Reynolds, J. [8 ,9 ]
Romani, R. W. [10 ]
Demorest, P. [3 ]
Johnston, S. [8 ]
van Straten, W. [11 ]
Parkinson, P. M. Saz [12 ,13 ]
Ziegler, M. [12 ,13 ]
Dormody, M. [12 ,13 ]
Thompson, D. J. [5 ]
Smith, D. A. [14 ,15 ]
Harding, A. K. [5 ]
Abdo, A. A. [2 ]
Crawford, F. [16 ]
Freire, P. C. C. [17 ]
Keith, M. [8 ]
Kramer, M. [18 ,19 ]
Roberts, M. S. E. [20 ]
Weltevrede, P. [8 ]
Wood, K. S. [2 ]
机构
[1] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA
[2] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA
[3] Natl Radio Astron Observ, Charlottesville, VA 22903 USA
[4] INAF Osservatorio Astron Cagliari, I-09012 Capoterra, Italy
[5] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[6] Univ Maryland, College Pk, MD 20742 USA
[7] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[8] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
[9] Parkes Observ, CSIRO, Parkes, NSW 2870, Australia
[10] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[11] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
[12] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA
[13] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
[14] Ctr Etud Nucl Bordeaux Gradignan, IN2P3, CNRS, F-33175 Gradignan, France
[15] Univ Bordeaux, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France
[16] Franklin & Marshall Coll, Dept Phys & Astron, Lancaster, PA 17604 USA
[17] Arecibo Observ, NAIC, Arecibo, PR 00612 USA
[18] MPIfR, D-53121 Bonn, Germany
[19] Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England
[20] Eureka Sci Inc, Oakland, CA 94602 USA
基金
瑞典研究理事会; 美国国家航空航天局; 美国国家科学基金会;
关键词
gamma rays: observations; ISM: individual (TeV J2032+4130); open clusters and associations: individual (Cyg OB2); pulsars: individual (PSR J1741-2054; PSR J2032+4127); X-rays: individual (Swift J174157.6-205411); SOURCE TEV J2032+4130; LARGE-AREA TELESCOPE; X-RAY; CYGNUS OB2; MASSIVE STARS; YOUNG PULSAR; DISCOVERY; EMISSION; PULSATIONS; POLARIZATION;
D O I
10.1088/0004-637X/705/1/1
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Sixteen pulsars have been discovered so far in blind searches of photons collected with the Large Area Telescope on the Fermi Gamma-ray Space Telescope. We here report the discovery of radio pulsations from two of them. PSR J1741-2054, with period P = 413 ms, was detected in archival Parkes telescope data and subsequently has been detected at the Green Bank Telescope (GBT). Its received flux varies greatly due to interstellar scintillation and it has a very small dispersion measure of DM = 4.7 pc cm(-3), implying a distance of approximate to 0.4 kpc and possibly the smallest luminosity of any known radio pulsar. At this distance, for isotropic emission, its gamma-ray luminosity above 0.1 GeV corresponds to 28% of the spin-down luminosity of (E) over dot = 9.4 x 10(33) erg s(-1). The gamma-ray profile occupies 1/3 of pulse phase and has three closely spaced peaks with the first peak lagging the radio pulse by delta = 0.29 P. We have also identified a soft Swift source that is the likely X-ray counterpart. In many respects PSR J1741-2054 resembles the Geminga pulsar. The second source, PSR J2032+4127, was detected at the GBT. It has P = 143 ms, and its DM = 115 pc cm(-3) suggests a distance of approximate to 3.6 kpc, but we consider it likely that it is located within the Cyg OB2 stellar association at half that distance. The radio emission is nearly 100% linearly polarized, and the main radio peak precedes by delta = 0.15 P the first of two narrow gamma-ray peaks that are separated by Delta = 0.50 P. The second peak has a harder spectrum than the first one, following a trend observed in young gamma-ray pulsars. Faint, diffuse X-ray emission in a Chandra image is possibly its pulsar wind nebula. The wind of PSR J2032+4127 is responsible for the formerly unidentified HEGRA source TeV J2032+4130. PSR J2032+4127 is coincident in projection with MT91 213, a Be star in Cyg OB2, although apparently not a binary companion of it.
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页码:1 / 13
页数:13
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