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Jet-powered Outflows in Supermassive Black Hole Binary Candidate SDSS J1048+0055
Jaiswal, Sumit1; Mohan, Prashanth1; An, Tao1; Frey, Sandor2
2019-03-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume873Issue:1Pages:7
Corresponding AuthorJaiswal, Sumit(sumit@shao.ac.cn)
AbstractThe search and study of close pairs of supermassive black holes (SMBHs) is important in the study of galaxy mergers that can possibly trigger active galactic nucleus (AGN) activity, and in the context of their evolution into the gravitational wave emitting regime. The quasar SDSS J1048+0055 was identified as an SMBH binary (SMBHB) candidate based on the observed double-peaked [O III]lambda lambda 4959, 5007 emission lines and two distinct radio components separated by similar to 20 pc (Zhou et al. 2004). To ascertain the binary nature of this source, we analyzed multifrequency, multiepoch very long baseline interferometry (VLBI) data to investigate its parsec-scale radio properties. The source shows double components with the western feature being brighter than the eastern one. This brighter component has a brightness temperature of similar to 10(10) K, a spectral index of alpha = -0.09 +/- 0.09 (flat), and is indicative of mildly relativistic beaming. In contrast, the faint component has a lower brightness temperature of similar to 10(8-9) K and a steep spectrum. These clues are consistent with a core-jet structure; moreover, the apparent separation speed between the two components is much higher than the expected orbital motion in a binary SMBH. Thus the present study excludes the association of the two VLBI components with the cores of an SMBHB; though, the SMBHB possibility (e.g., a pair of radio-loud and radio-quiet AGNs) is not fully ruled out. In the single AGN scenario, the double-peaked optical emission lines can originate from the jet interacting with the narrow-line region as indicated by a change in the jet direction at similar to 140 pc.
Keywordblack hole physics galaxies: active galaxies: individual (SDSS J1048+0055) quasars: emission lines radio continuum: galaxies
DOI10.3847/1538-4357/ab0176
WOS KeywordACTIVE GALACTIC NUCLEI ; NARROW-LINE REGION ; RADIO GALAXY ; QUASAR ; COEVOLUTION ; POPULATION ; KINEMATICS ; TELESCOPE ; DISCOVERY ; PAIR
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000459984900011
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23873
Collection中国科学院紫金山天文台
Corresponding AuthorJaiswal, Sumit
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Radio Astron, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.MTA Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
Recommended Citation
GB/T 7714
Jaiswal, Sumit,Mohan, Prashanth,An, Tao,et al. Jet-powered Outflows in Supermassive Black Hole Binary Candidate SDSS J1048+0055[J]. ASTROPHYSICAL JOURNAL,2019,873(1):7.
APA Jaiswal, Sumit,Mohan, Prashanth,An, Tao,&Frey, Sandor.(2019).Jet-powered Outflows in Supermassive Black Hole Binary Candidate SDSS J1048+0055.ASTROPHYSICAL JOURNAL,873(1),7.
MLA Jaiswal, Sumit,et al."Jet-powered Outflows in Supermassive Black Hole Binary Candidate SDSS J1048+0055".ASTROPHYSICAL JOURNAL 873.1(2019):7.
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