YNAO OpenIR  > 恒星物理研究组
Nondetection of the Gamma-Ray Burst X-Ray Emission Line: The Down-Comptonization Effect
Liu JY(刘杰英)1,2,3; Mao JR(毛基荣)1,2,3
Source PublicationASTROPHYSICAL JOURNAL
2020-09-01
Volume900Issue:1Pages:5
DOI10.3847/1538-4357/aba4a0
Contribution Rank第1完成单位
Indexed BySCI
KeywordGamma-ray bursts X-ray detectors
Abstract

The detection of the gamma-ray burst (GRB) X-ray emission line is important for studying GRB physics and constraining the GRB redshift. Since the line-like feature in the GRB X-ray spectrum was first reported in 1999, several works on line searching have been published over the past two decades. Even though some observations on the X-ray line-like feature were performed, its significance remains controversial to date. In this paper, we utilize the down-Comptonization mechanism and present the time evolution of the Fe K alpha line emitted near the GRB central engine. The line intensity decreases with the evolution time, and the time evolution depends on the electron density and the electron temperature. In addition, the initial line with a larger broadening decreases less over time. For instance, when the emission line penetrates material with an electron density above 10(12)cm(-3)at 1 keV, it generally becomes insignificant enough after 100 s for it not to be detected . The line-like profile deviates from the Gaussian form, and it finally changes to be similar to a blackbody shape at the time of the thermal equilibrium between the line photons and the surrounding material.

Funding ProjectNational Natural Science Foundation of China[11303086] ; National Natural Science Foundation of China[11673062] ; Chinese Academy of Sciences ; Oversea Talent Program of Yunnan Province
Funding OrganizationNational Natural Science Foundation of China[11303086, 11673062] ; Chinese Academy of Sciences ; Oversea Talent Program of Yunnan Province
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000566090400001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordIRON LINES ; AFTERGLOWS ; SWIFT ; COCOON ; EVOLUTION ; SPECTRA ; SEARCH ; GRB-011211 ; COMPONENTS ; SIGNATURES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23704
Collection恒星物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorMao JR(毛基荣)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan Province, People's Republic of China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu JY,Mao JR. Nondetection of the Gamma-Ray Burst X-Ray Emission Line: The Down-Comptonization Effect[J]. ASTROPHYSICAL JOURNAL,2020,900(1):5.
APA Liu JY,&Mao JR.(2020).Nondetection of the Gamma-Ray Burst X-Ray Emission Line: The Down-Comptonization Effect.ASTROPHYSICAL JOURNAL,900(1),5.
MLA Liu JY,et al."Nondetection of the Gamma-Ray Burst X-Ray Emission Line: The Down-Comptonization Effect".ASTROPHYSICAL JOURNAL 900.1(2020):5.
Files in This Item:
File Name/Size DocType Version Access License
Nondetection of the (337KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu JY(刘杰英)]'s Articles
[Mao JR(毛基荣)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu JY(刘杰英)]'s Articles
[Mao JR(毛基荣)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu JY(刘杰英)]'s Articles
[Mao JR(毛基荣)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Nondetection of the Gamma-Ray Burst X-Ray Emission Line_ The Down-Comptonization Effect.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.