NAOC Open IR  > 射电天文研究部
Group galaxies around giant radio galaxy NGC 6251
Chen, R.1; Peng, B.1,2; Strom, R. G.1,3,4,5; Wei, J.1
2011-04-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume412Issue:4Pages:2433-2444
AbstractWe have investigated galaxies around NGC 6251 to search for an associated group. Our main goal is to study the environment around the giant radio galaxy to better understand the reasons for its size and structure. To this end, we have made spectroscopic observations with the 2.16-m optical telescope at Xinglong Station of the National Astronomical Observatories of China (NAOC) and obtained spectra of 45 objects (including four likely stars). The redshifts give us 10 new galaxies in a group, which are in addition to seven previously known members. The 17 galaxies' positions are compared with the radio emission. The optical velocity dispersion of group members within 0.7 Mpc of NGC 6251 is not consistent with that expected from correlation curves of X-ray luminosity L-x versus velocity dispersion Sigma(r). We briefly discuss this result, suggesting that in the NGC 6251 group, the density of X-ray emitting gas is unusually low, and this is the main reason for the size of the radio source.
KeywordTechniques: Spectroscopic Ism: Jets And Outflows Galaxies: Active Galaxies: Distances And Redshifts Galaxies: Individual: Ngc 6251 Galaxies: Ism
DOI10.1111/j.1365-2966.2010.18064.x
Indexed BySCI
Language英语
WOS IDWOS:000289295800025
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8022
Collection射电天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Joint Lab Radio Astron Technol, Beijing 100012, Peoples R China
3.Netherlands Inst Radio Astron ASTRON, NL-7990 AA Dwingeloo, Netherlands
4.Univ Amsterdam, Fac Sci, Astron Inst Anton Pannekoek, NL-1012 WX Amsterdam, Netherlands
5.James Cook Univ, Ctr Astron, Townsville, Qld 4811, Australia
Recommended Citation
GB/T 7714
Chen, R.,Peng, B.,Strom, R. G.,et al. Group galaxies around giant radio galaxy NGC 6251[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,412(4):2433-2444.
APA Chen, R.,Peng, B.,Strom, R. G.,&Wei, J..(2011).Group galaxies around giant radio galaxy NGC 6251.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,412(4),2433-2444.
MLA Chen, R.,et al."Group galaxies around giant radio galaxy NGC 6251".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 412.4(2011):2433-2444.
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