XAO OpenIR  > 射电天文研究室  > 星系宇宙学研究团组
Structure, spectra and variability of some GPS radio sources
X.Liu1; H.-G.Song1; L.Cui1,2
2009-02-15
Conference Name4th Workshop on Compact Steep Spectrum and Gigahertz-Peaked Spectrum Radio Sources
Source PublicationASTRONOMISCHE NACHRICHTEN
Pages145-148
Conference Date2008-05-26
Conference PlaceRiccione, ITALY
Publication PlaceWEINHEIM, GERMANY
PublisherWILEY-VCH VERLAG GMBH
Contribution Rank1
Abstract

We report the results of multifrequency-VLBI observations of GHz-Peaked-Spectrum (GPS) radio sources. The VLBI structure and component spectra of some GPS sources are presented. Our VLBI results show that about 80% of the GPS galaxies exhibit a compact double or CSO-like structure, white the GPS quasars tend to show a core-jet. The component spectra of the GPS galaxies are often steep/convex, and the core has a flat spectrum but it is usually hidden or weak. In addition, we studied the variability of GPS sources by comparing new flux density measures, acquired with the Urumqi 25-m telescope at 4.85 GHz, with previous 87GB data. The results show that 44% of the GPS quasars varied higher than 10% in passed 20 years, while the fraction is only 12% for the GPS galaxies meaning that the GPS quasars are much more variable than GPS galaxies. In total, 25% of GPS sources show > 10% variability at 4.85 GHz in our sample.

Funding OrganizationINAF Istituto di Radioastronomia ; INAF Istituto di Radioastronomia
KeywordGalaxies: Nuclei Quasars: General Radio Continuum: Galaxies
Subject Area星系和宇宙学
DOI10.1002/asna.200811142
Funding Project星系宇宙学研究团组
Language英语
ISSN0004-6337
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/281
Collection射电天文研究室_星系宇宙学研究团组
射电天文研究室
天文科普教育中心
Corresponding AuthorX.Liu
Affiliation1.National Astronomical Observatories/Urumqi observatory, CAS, 40-5 South Beijing Rd, Urumqi 830011, PR China
2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, PR China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
X.Liu,H.-G.Song,L.Cui. Structure, spectra and variability of some GPS radio sources[C]. WEINHEIM, GERMANY:WILEY-VCH VERLAG GMBH,2009:145-148.
Files in This Item:
File Name/Size DocType Version Access License
Structure, spectra a(165KB)会议论文 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
[X.Liu]'s Articles
[H.-G.Song]'s Articles
[L.Cui]'s Articles
Baidu academic
Similar articles in Baidu academic
[X.Liu]'s Articles
[H.-G.Song]'s Articles
[L.Cui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[X.Liu]'s Articles
[H.-G.Song]'s Articles
[L.Cui]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Structure, spectra and variability of some GPS radio sources.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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