Unravelling the nature of the dual AGN in the galaxy pair system IRAS 05589+2828 and 2MASX J06021107+2828382

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY(2022)

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摘要
We have studied the nuclear region of the previously detected dual AGN system in the galaxy pair IRAS 05589 + 2828 and 2MASX J06021107 + 2828382, through new optical spectroscopy observations, along with radio and X-ray archival data. Our multiwavelength data strongly suggest that the Sy 1 IRAS 05589+2828 (z = 0.0330 +/- 0.0002) conforms to a dual AGN system with the Sy2 2MASX J06021107 + 2828382 (z = 0.0334 +/- 0.0001), with a projected separation obtained from the radio data of 20.08 arcsec (similar to 13.3 kpc). Analysis of the optical spectra reveals a faint narrow extended emission from H alpha and [O III) amidst the two AGN, supporting evidence for an ongoing merger. IRAS 05589 + 2828 is a double component narrow emission-line AGN, with complex broad Balmer emission line profiles that clearly show a strong red-peaklet with a velocity shift of similar to 3500 km s(-1). The black hole mass estimates of IRAS 05589 +/- 2828 and 2MASX J06021107 + 2828382 are log M-BH = 8.59 +/- 0.14 (M-circle dot) and log M-BH = 8.21 +/- 0.2 (M-circle dot), respectively. In the X-ray bands, IRAS 05589 + 2828 is compatible with a Type 1 object, showing both spectral and flux variability. Chandra data of 2MASX J06021107 + 2828382 allowed us to measure a high hardness ratio in this source, providing evidence for a Type 2 AGN. The 22 GHz image obtained with the Karl G. Jansky Very Large Array has revealed that both AGN are compact radio objects with spectral indices -0.26 +/- 0.03 and -0.70 +/- 0.11, confirming for the first time its dual AGN nature in the radio bands.
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关键词
galaxies: active, galaxies: evolution, quasars emission lines, quasars: individual: IRAS 05589+2828, 2MASX J06021107+2828382, galaxies: Seyfert
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