PMO OpenIR
Multifrequency VLBA polarimetry of the high-redshift GPS quasar OQ172
Liu, Yi1,2; Jiang, D. R.2,3; Gu, Minfeng3; Gurvits, L. I.4,5
2017-07-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume468Issue:3Pages:2699-2712
Corresponding AuthorLiu, Yi(liuyi@pmo.ac.cn) ; Gu, Minfeng(gumf@shao.ac.cn)
AbstractMultifrequency Very Long Baseline Array (VLBA) polarimetry observation of the GHz-peaked spectrum (GPS) quasar OQ172 (J1445+ 0958) has been performed at 1.6, 2.2, 4.8, 8.3 and 15.3 GHz in 2005. Core-jet structures are detected in all bands with the jet strongly bent at about 3 mas from the core. The radio emission of the source is polarized at all five bands. We study the Faraday rotation in the core and jet components at all five bands, and find good linear fits of Faraday rotation in the core and jet components at 4.8 and 8.3 GHz. At these two frequencies, the rotation measure (RM) is similar to 2000 rad m(-2) in the core and similar to 700 rad m(-2) in the inner jet components and continues to decrease at the outer jet parts. We find that the depolarization at 4.8 and 8.3 GHz might be caused by the internal medium in the source. We investigate consistency of the turnover spectra of VLBI components with the synchrotron self-absorption and free-free absorption models. Although these two models cannot be easily distinguished due to the lack of low-frequency data, the physical parameters can be constrained for each model. We find that the large width of the [O III](5007) line is likely caused by a jet interaction with a narrow line region (NLR) medium. The jet bending, significant RM variations, Faraday depolarization, spectral turnover and broad line width of [O III](5007) could be closely related, likely caused by the same nucleus medium, presumably NLR.
Keywordgalaxies: jet galaxies: nuclei quasars: individual: OQ172
DOI10.1093/mnras/stx617
WOS KeywordCOMPACT STEEP-SPECTRUM ; ACTIVE GALACTIC NUCLEI ; GHZ-PEAKED-SPECTRUM ; BLACK-HOLE MASS ; RADIO-SOURCES ; ROTATION MEASURES ; PARSEC-SCALE ; VELOCITY DISPERSION ; RELATIVISTIC JETS ; SAMPLE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000402808700015
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22980
Collection中国科学院紫金山天文台
Corresponding AuthorLiu, Yi; Gu, Minfeng
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
4.Joint Inst VLBI ERIC, POB 2, NL-7990 AA Dwingeloo, Netherlands
5.Delft Univ Technol, Dept Astrodynam & Space Missions, Kluyverweg 1, NL-2629 HS Delft, Netherlands
Recommended Citation
GB/T 7714
Liu, Yi,Jiang, D. R.,Gu, Minfeng,et al. Multifrequency VLBA polarimetry of the high-redshift GPS quasar OQ172[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(3):2699-2712.
APA Liu, Yi,Jiang, D. R.,Gu, Minfeng,&Gurvits, L. I..(2017).Multifrequency VLBA polarimetry of the high-redshift GPS quasar OQ172.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(3),2699-2712.
MLA Liu, Yi,et al."Multifrequency VLBA polarimetry of the high-redshift GPS quasar OQ172".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.3(2017):2699-2712.
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
[Liu, Yi]'s Articles
[Jiang, D. R.]'s Articles
[Gu, Minfeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Yi]'s Articles
[Jiang, D. R.]'s Articles
[Gu, Minfeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Yi]'s Articles
[Jiang, D. R.]'s Articles
[Gu, Minfeng]'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.