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A Study of Fermi-LAT GeV gamma-Ray Emission toward the Magnetar-harboring Supernova Remnant Kesteven 73 and Its Molecular Environment
Liu, Bing1; Chen, Yang1,2; Zhang, Xiao1; Liu, Qian-Cheng1; He, Ting-Lan1,3; Zhou, Xin4; Zhou, Ping1,5; Su, Yang4
2017-12-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume851Issue:1Pages:11
Corresponding AuthorChen, Yang()
AbstractWe report our independent Gey gamma-ray study the young shell-type supernova remnant (SNR) Kes 73, which harbors a central magnetar, and CO-line millimeter observations toward the SNR. Using 7.6 years of Fermi-LAT observation data, we detected an extended gamma-ray source ("source A") with centroid on the west of the SNR, with a significance of 21 sigma in 0.1-300 GeV and an error circle of 5'.4n angular radius. The gamma-ray spectrum cannot be reproduced by a pure leptonic emission or a pure emission from the magnetar, and thus a hadronic emission component is needed. The CO-line observations reveal a molecular cloud (MC) at V-LSR similar to 90 km s(-1), which demonstrates morphological correspondence with the western boundary of the SNR brightened in multiwavelength. The (CO)-C-12 (J-1)/(CO)-C-12 (J-1-0)retioin the left (blue) wing 85-88 km s(-1) is prominently elevated to similar to 1.1 along the northwestern boundary, providing kinematic evidence of the SNR-MC interaction. This SNR-MC association yields a kinematic distance 9 kpc to Kes 73. The MC is shown to be capable of accounting for the hadronic gamma ray emission component. The gamma-ray spectrum can be interpreted with a pure hadronic emission or a magnetar+ hadronic hybrid emission. In the case of pure hadronic emission, the spectral index of the protons is 2.4, very similar to that of the radio-emitting electrons, essentially consistent with the diffusive shock acceleration theory. In the case of magnetar+ hadronic hybrid emission, a magnetic field decay rate. 1036 erg s(-1) is needed to power the magnetar's curvature radiation.
Keywordacceleration of particles gamma rays: ISM ISM: individual objects (G27.4+0.0=Kes 73) ISM: molecules ISM: supernova remnants stars: magnetars (1E 1841-045)
DOI10.3847/1538-4357/aa97d9
WOS KeywordLARGE-AREA TELESCOPE ; GALACTIC PLANE ; CO SURVEY ; DISCOVERY ; DISTANCE ; MISSION ; CLOUDS ; W44
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000417483700008
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22113
Collection中国科学院紫金山天文台
Corresponding AuthorChen, Yang
Affiliation1.Nanjing Univ, Dept Astron, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China
2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
4.Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
5.Univ Amsterdam, Anton Pannekoek Inst, POB 94249, NL-1090 GE Amsterdam, Netherlands
Recommended Citation
GB/T 7714
Liu, Bing,Chen, Yang,Zhang, Xiao,et al. A Study of Fermi-LAT GeV gamma-Ray Emission toward the Magnetar-harboring Supernova Remnant Kesteven 73 and Its Molecular Environment[J]. ASTROPHYSICAL JOURNAL,2017,851(1):11.
APA Liu, Bing.,Chen, Yang.,Zhang, Xiao.,Liu, Qian-Cheng.,He, Ting-Lan.,...&Su, Yang.(2017).A Study of Fermi-LAT GeV gamma-Ray Emission toward the Magnetar-harboring Supernova Remnant Kesteven 73 and Its Molecular Environment.ASTROPHYSICAL JOURNAL,851(1),11.
MLA Liu, Bing,et al."A Study of Fermi-LAT GeV gamma-Ray Emission toward the Magnetar-harboring Supernova Remnant Kesteven 73 and Its Molecular Environment".ASTROPHYSICAL JOURNAL 851.1(2017):11.
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