NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-25 T17:11:08 PDT
Help | Comment | NED Home

For refcode 2009ApJ...705L..76W:
Retrieve 87 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2009ApJ...705L..76W Active Galactic Nuclei with Double-Peaked Narrow Lines: Are they Dual Active Galactic Nuclei? Wang, Jian-Min; Chen, Yan-Mei; Hu, Chen; Mao, Wei-Ming; Zhang, Shu; Bian, Wei-Hao Abstract. Double-peaked [O III] profiles in active galactic nuclei (AGNs) may provide evidence for the existence of dual AGNs, but a good diagnostic for selecting them is currently lacking. Starting from ~7000 active galaxies in Sloan Digital Sky Survey DR7, we assemble a sample of 87 type 2 AGNs with double-peaked [O III] profiles. The nuclear obscuration in the type 2 AGNs allows us to determine redshifts of host galaxies through stellar absorption lines. We typically find that one peak is redshifted and another is blueshifted relative to the host galaxy. We find a strong correlation between the ratios of the shifts and the double peak fluxes. The correlation can be naturally explained by the Keplerian relation predicted by models of co-rotating dual AGNs. The current sample statistically favors that most of the [O III] double-peaked sources are dual AGNs and disfavors other explanations, such as rotating disk and outflows. These dual AGNs have a separation distance at ~1 kpc scale, showing an intermediate phase of merging systems. The appearance of dual AGNs is about ~10^-2^, impacting on the current observational deficit of binary supermassive black holes with a probability of ~10^-4^ (Boroson & Lauer). Key words: black hole physics, galaxies: evolution =========================================================================== 2009ApJ...707L.107W ERRATUM: "Active Galactic Nuclei With Double-Peaked Narrow Lines: Are They Dual Active Galactic Nuclei?" (2009, ApJ, 705, L76) Wang, Jian-Min; Chen, Yan-Mei; Hu, Chen; Mao, Wei-Ming; Zhang, Shu; Bian, Wei-Hao Abstract. The incorrect labeling of redshifts and blueshifts resulted in some errors in the notes of Table 1, the x-axis label of Figure 4, and Equation (1). The notes to Table 1 pertaining to Columns 3 and 4 should have read, "Columns 3 and 4 are the Doppler blueshifts and redshifts of the [O III] line in units of A, respectively." The corrected Figure 4 and Equation (1) appear below. ===========================================================================
Retrieve 87 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home