NAOC Open IR
extragalacticdispersionmeasuresoffastradiobursts
Xu Jun; Han J L
2015
Source Publicationresearchinastronomyandastrophysics
ISSN1674-4527
Volume15Issue:10Pages:1629
AbstractFast radio bursts show large dispersion measures, much larger than the Galactic dispersion measure foreground. Therefore, they evidently have an extragalactic origin. We investigate possible contributions to the dispersion measure from host galaxies. We simulate the spatial distribution of fast radio bursts and calculate the dispersion measures along the sightlines from fast radio bursts to the edge of host galaxies by using the scaled NE2001 model for thermal electron density distributions. We find that contributions to the dispersion measure of fast radio bursts from the host galaxy follow a skew Gaussian distribution. The peak and the width at half maximum of the dispersion measure distribution increase with the inclination angle of a spiral galaxy, to large values when the inclination angle is over 70 degrees. The largest dispersion measure produced by an edge-on spiral galaxy can reach a few thousand pc cm(-3), while the dispersion measures from dwarf galaxies and elliptical galaxies have a maximum of only a few tens of pc cm(-3). Notice, however, that additional dispersion measures of tens to hundreds of pc cm(-3) can be produced by high density clumps in host galaxies. Simulations that include dispersion measure contributions from the Large Magellanic Cloud and the Andromeda Galaxy are shown as examples to demonstrate how to extract the dispersion measure from the intergalactic medium.
Language英语
Funding Project[National Natural Science Foundation of China] ; [Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37778
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu Jun,Han J L. extragalacticdispersionmeasuresoffastradiobursts[J]. researchinastronomyandastrophysics,2015,15(10):1629.
APA Xu Jun,&Han J L.(2015).extragalacticdispersionmeasuresoffastradiobursts.researchinastronomyandastrophysics,15(10),1629.
MLA Xu Jun,et al."extragalacticdispersionmeasuresoffastradiobursts".researchinastronomyandastrophysics 15.10(2015):1629.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu Jun]'s Articles
[Han J L]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu Jun]'s Articles
[Han J L]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu Jun]'s Articles
[Han J L]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

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