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A NEW ELECTRON-DENSITY MODEL FOR ESTIMATION OF PULSAR AND FRB DISTANCES
Yao, J. M.1,2; Manchester, R. N.3; Wang, N.1,4
2017-01-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume835Issue:1Pages:29
Contribution Rank1
Abstract

We present a new model for the distribution of free electrons in the Galaxy, the Magellanic Clouds, and the intergalactic medium (IGM) that can be used to estimate distances to real or simulated pulsars and fast radio bursts (FRBs) based on their dispersion measure (DM). The Galactic model has an extended thick disk representing the so-called warm interstellar medium, a thin disk representing the Galactic molecular ring, spiral arms based on a recent fit to Galactic H II regions, a Galactic Center disk, and seven local features including the Gum Nebula, Galactic Loop I, and the Local Bubble. An offset of the Sun from the Galactic plane and a warp of the outer Galactic disk are included in the model. Parameters of the Galactic model are determined by fitting to 189 pulsars with independently determined distances and DMs. Simple models are used for the Magellanic Clouds and the IGM. Galactic model distances are within the uncertainty range for 86 of the 189 independently determined distances and within 20% of the nearest limit for a further 38 pulsars. We estimate that 95% of predicted Galactic pulsar distances will have a relative error of less than a factor of 0.9. The predictions of YMW16 are compared to those of the TC93 and NE2001 models showing that YMW16 performs significantly better on all measures. Timescales for pulse broadening due to interstellar scattering are estimated for (real or simulated) Galactic and Magellanic Cloud pulsars and FRBs.

KeywordIsm: Structure Pulsars: General Stars: Distances
SubtypeArticle
DOI10.3847/1538-4357/835/1/29
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordFast Radio-burst ; Warm Ionized-gas ; Large-magellanic-cloud ; Supermassive Black-hole ; Telescope Compact Array ; North Polar Spur ; Galactic-center ; Milky-way ; H-alpha ; Interstellar-medium
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000393455400029
Funding OrganizationNational Basic Research Program of China (973 Program)(2015CB857100 ; Chinese Academy of Science(XDB09000000) ; National Natural Science Foundation of China(11373006) ; West Light Foundation of CAS(ZD201302) ; 2012CB821801)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/1423
Collection射电天文研究室_脉冲星研究团组
射电天文研究室
其它
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Australia Telescope Natl Facil, CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia
4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yao, J. M.,Manchester, R. N.,Wang, N.. A NEW ELECTRON-DENSITY MODEL FOR ESTIMATION OF PULSAR AND FRB DISTANCES[J]. ASTROPHYSICAL JOURNAL,2017,835(1):29.
APA Yao, J. M.,Manchester, R. N.,&Wang, N..(2017).A NEW ELECTRON-DENSITY MODEL FOR ESTIMATION OF PULSAR AND FRB DISTANCES.ASTROPHYSICAL JOURNAL,835(1),29.
MLA Yao, J. M.,et al."A NEW ELECTRON-DENSITY MODEL FOR ESTIMATION OF PULSAR AND FRB DISTANCES".ASTROPHYSICAL JOURNAL 835.1(2017):29.
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