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NARROW DOUBLE-PEAKED EMISSION LINES OF SDSS J131642.90+175332.5: SIGNATURE OF A SINGLE OR A BINARY AGN IN A MERGER, JET-CLOUD INTERACTION, OR UNUSUAL NARROW-LINE REGION GEOMETRY
Xu, Dawei1; Komossa, S.2
2009-11-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
Volume705Issue:1Pages:L20-L24
AbstractWe present an analysis of the active galaxy SDSS J131642.90+175332.5, which is remarkable because all of its narrow emission lines are double-peaked, and because it additionally shows an extra broad component (FHWM similar to 1400 km s(-1)) in most of its forbidden lines, peaking in between the two narrow systems. The peaks of the two narrow systems are separated by 400-500 km s(-1) in velocity space. The spectral characteristics of double-peaked [O III] emission have previously been interpreted as a signature of dual or binary active galactic nuclei (AGNs), among other models. In the context of the binary scenario, SDSS J131642.90+175332.5 is a particularly good candidate because not just one line but all of its emission lines are double-peaked. However, we also discuss a number of other scenarios which can potentially account for double-peaked narrow emission lines, including projection effects, a two-sided outflow, jet-cloud interactions, special narrow-line region (NLR) geometries (disks, bars, or inner spirals), and a galaxy merger with only one AGN illuminating two NLRs. We argue that the similarity of the emission-line ratios in both systems, and the presence of the very unusual broad component at intermediate velocity, makes a close pair of unrelated AGNs unlikely, and rather argues for processes in a single galaxy or merger. We describe future observations that can distinguish between these remaining possibilities.
KeywordGalaxies: Active Galaxies: Evolution Galaxies: Individual (Sdss j131642.90+175332.5) Quasars: Emission Lines
DOI10.1088/0004-637X/705/1/L20
Indexed BySCI
Language英语
WOS IDWOS:000270927900005
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7944
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Max Planck Inst Extraterr Phys, D-85741 Garching, Germany
Recommended Citation
GB/T 7714
Xu, Dawei,Komossa, S.. NARROW DOUBLE-PEAKED EMISSION LINES OF SDSS J131642.90+175332.5: SIGNATURE OF A SINGLE OR A BINARY AGN IN A MERGER, JET-CLOUD INTERACTION, OR UNUSUAL NARROW-LINE REGION GEOMETRY[J]. ASTROPHYSICAL JOURNAL LETTERS,2009,705(1):L20-L24.
APA Xu, Dawei,&Komossa, S..(2009).NARROW DOUBLE-PEAKED EMISSION LINES OF SDSS J131642.90+175332.5: SIGNATURE OF A SINGLE OR A BINARY AGN IN A MERGER, JET-CLOUD INTERACTION, OR UNUSUAL NARROW-LINE REGION GEOMETRY.ASTROPHYSICAL JOURNAL LETTERS,705(1),L20-L24.
MLA Xu, Dawei,et al."NARROW DOUBLE-PEAKED EMISSION LINES OF SDSS J131642.90+175332.5: SIGNATURE OF A SINGLE OR A BINARY AGN IN A MERGER, JET-CLOUD INTERACTION, OR UNUSUAL NARROW-LINE REGION GEOMETRY".ASTROPHYSICAL JOURNAL LETTERS 705.1(2009):L20-L24.
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