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SINGLE-PULSE RADIO OBSERVATIONS OF THE GALACTIC CENTER MAGNETAR PSR J1745-2900
Yan, Zhen1,2; Shen, Zhi-Qiang1,2; Wu, Xin-Ji3; Manchester, R. N.4; Weltevrede, P.5; Wu, Ya-Jun1,2; Zhao, Rong-Bing1,2; Yuan, Jian-Ping2,6; Lee, Ke-Jia7; Fan, Qing-Yuan1,2; Hong, Xiao-Yu1,2; Jiang, Dong-Rong1,2; Li, Bin1,2; Liang, Shi-Guang1,2; Ling, Quan-Bao1,2; Liu, Qing-Hui1,2; Qian, Zhi-Han1,2; Zhang, Xiu-Zhong1,2; Zhong, Wei-Ye1,2; Ye, Shu-Hua1,2
2015-11-20
Source PublicationASTROPHYSICAL JOURNAL
Volume814Issue:1
AbstractIn this paper, we report radio observations of the Galactic Center magnetar PSR J1745-2900 at six epochs between 2014 June and October. These observations were carried out using the new Shanghai Tian Ma Radio Telescope at a frequency of 8.6 GHz. Both the flux density and integrated profile of PSR J1745-2900 show dramatic changes from epoch to epoch, showing that the pulsar was in its "erratic" phase. On MJD 56836, the flux density of this magnetar was about 8.7 mJy, which was 10 times larger than that reported at the time of discovery, enabling a single-pulse analysis. The emission is dominated by narrow "spiky" pulses that follow a log-normal distribution in peak flux density. From 1913 pulses, we detected 53 pulses whose peak flux densities are 10 times greater than that of the integrated profile. They are concentrated in pulse phase at the peaks of the integrated profile. The pulse widths at the 50% level of these bright pulses were between 0.2 and 0.9, much narrower than that of the integrated profile (similar to 12 degrees). The observed pulse widths may be limited by interstellar scattering. No clear correlation was found between the widths and peak flux density of these pulses and no evidence was found for subpulse drifting. Relatively strong spiky pulses are also detected in the other five epochs of observation, showing the same properties as those detected in MJD 56836. These strong spiky pulses cannot be classified as "giant" pulses but are more closely related to normal pulse emission.
KeywordPulsars: Individual (Psr J1745-2900)
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/814/1/5
WOS KeywordSAGITTARIUS A-ASTERISK ; GIANT PULSES ; MODULATION PROPERTIES ; SUBPULSE MODULATION ; SGR J1745-2900 ; CENTRAL PARSEC ; CRAB PULSAR ; DISCOVERY ; POPULATION ; FREQUENCY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000365310200005
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16079
Collection盱眙天文观测站
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100864, Peoples R China
3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
4.CSIRO Astron & Space Sci, Epping, NSW 1710, Australia
5.Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England
6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
7.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Yan, Zhen,Shen, Zhi-Qiang,Wu, Xin-Ji,et al. SINGLE-PULSE RADIO OBSERVATIONS OF THE GALACTIC CENTER MAGNETAR PSR J1745-2900[J]. ASTROPHYSICAL JOURNAL,2015,814(1).
APA Yan, Zhen.,Shen, Zhi-Qiang.,Wu, Xin-Ji.,Manchester, R. N..,Weltevrede, P..,...&Ye, Shu-Hua.(2015).SINGLE-PULSE RADIO OBSERVATIONS OF THE GALACTIC CENTER MAGNETAR PSR J1745-2900.ASTROPHYSICAL JOURNAL,814(1).
MLA Yan, Zhen,et al."SINGLE-PULSE RADIO OBSERVATIONS OF THE GALACTIC CENTER MAGNETAR PSR J1745-2900".ASTROPHYSICAL JOURNAL 814.1(2015).
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