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Fermi Large Area Telescope Detection of Pulsed gamma-Rays From The Vela-Like Pulsars PSR J1048-5832 and PSR J2229+6114

文献类型:期刊论文

作者Abdo, A. A.; Ackermann, M.; Ajello, M.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M. G.; Bastieri, D.
刊名Astrophysical Journal
出版日期2009-12-01
卷号706期号:2页码:1331-1340
ISSN号0004-637X
关键词gamma rays: observations pulsars: individual (PSR J1048-5832 pulsars: general PSr J222+6114)
通讯作者ahardingx@yahoo.com
英文摘要We report the detection of gamma-ray pulsations (>= 0.1GeV) from PSR J2229+ 6114 and PSR J1048-5832, the latter having been detected as a low-significance pulsar by EGRET. Data in the gamma-ray band were acquired by the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope, while the radio rotational ephemerides used to fold the gamma-ray light curves were obtained using the Green Bank Telescope, the Lovell telescope at Jodrell Bank, and the Parkes Telescope. The two young radio pulsars, located within the error circles of the previously unidentified EGRET sources 3EG J1048-5840 and 3EG J2227+6122, present spin-down characteristics similar to the Vela pulsar. PSR J1048-5832 shows two sharp peaks at phases 0.15 +/- 0.01 and 0.57 +/- 0.01 relative to the radio pulse confirming the EGRET light curve, while PSR J2229+ 6114 presents a very broad peak at phase 0.49 +/- 0.01. The gamma-ray spectra above 0.1 GeV of both pulsars are fit with power laws having exponential cutoffs near 3 GeV, leading to integral photon fluxes of (2.19 +/- 0.22 +/- 0.32) x 10(-7) cm(-2) s(-1) for PSR J1048-5832 and (3.77 +/- 0.22 +/- 0.44) x 10(-7) cm(-2) s(-1) for PSR J2229+6114. The first uncertainty is statistical and the second is systematic. PSR J1048-5832 is one of the two LAT sources whichwere entangled together as 3EG J1048-5840. These detections add to the growing number of young gamma-ray pulsars that make up the dominant population of GeV gamma-ray sources in the Galactic plane.
学科主题致密天体、高能和基础物理
资助信息Commonwealth Government;Associated Universities, Inc. ;Science and Technology Facilities Council of the United Kingdom
收录类别SCI
语种英语
WOS记录号WOS:000271872900032
公开日期2013-03-06
源URL[http://ir.xao.ac.cn/handle/45760611-7/185]  
专题新疆天文台_其它
新疆天文台_射电天文研究室
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Abdo, A. A.,Ackermann, M.,Ajello, M.,et al. Fermi Large Area Telescope Detection of Pulsed gamma-Rays From The Vela-Like Pulsars PSR J1048-5832 and PSR J2229+6114[J]. Astrophysical Journal,2009,706(2):1331-1340.
APA Abdo, A. A..,Ackermann, M..,Ajello, M..,Atwood, W. B..,Axelsson, M..,...&Wang, N..(2009).Fermi Large Area Telescope Detection of Pulsed gamma-Rays From The Vela-Like Pulsars PSR J1048-5832 and PSR J2229+6114.Astrophysical Journal,706(2),1331-1340.
MLA Abdo, A. A.,et al."Fermi Large Area Telescope Detection of Pulsed gamma-Rays From The Vela-Like Pulsars PSR J1048-5832 and PSR J2229+6114".Astrophysical Journal 706.2(2009):1331-1340.

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