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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
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| 2015-11-20 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| Volume | 814Issue:1Pages:5 |
| Contribution Rank | 6 |
| Abstract | In 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. |
| Keyword | Pulsars: Individual (Psr J1745-2900) |
| Subtype | Article |
| DOI | 10.1088/0004-637X/814/1/5 |
| WOS Headings | Science & Technology ; Physical Sciences |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | SAGITTARIUS A-ASTERISK ; GIANT PULSES ; MODULATION PROPERTIES ; SUBPULSE MODULATION ; SGR J1745-2900 ; CENTRAL PARSEC ; CRAB PULSAR ; DISCOVERY ; POPULATION ; FREQUENCY |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000365310200005 |
| Funding Organization | National Natural Science Foundation of China(11173046 ; Natural Science Foundation of Shanghai(13ZR1464500) ; National Basic Research Program of China (973 program)(2012CB821806) ; Strategic Priority Research Program |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/902 |
| Collection | 射电天文研究室_脉冲星研究团组 射电天文研究室 |
| Corresponding Author | Yan, Zhen |
| Affiliation | 1.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):5. |
| 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),5. |
| MLA | Yan, Zhen,et al."SINGLE-PULSE RADIO OBSERVATIONS OF THE GALACTIC CENTER MAGNETAR PSR J1745-2900".ASTROPHYSICAL JOURNAL 814.1(2015):5. |
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| File Name/Size | DocType | Version | Access | License | ||
| Yan-2015-SINGLE-PULS（882KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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