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

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

Aug 12, 2022

20 pages

Published in:

Mon.Not.Roy.Astron.Soc. 516 (2022) 4, 5270-5288

Published: Oct 4, 2022

e-Print:

2208.06451 [astro-ph.GA]

DOI:

10.1093/mnras/stac2244

View in:

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Abstract: (Oxford University Press)

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 Sy1 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 (∼13.3 kpc). Analysis of the optical spectra reveals a faint narrow extended emission from H α 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 ∼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_⊙) and log MBH = 8.21 ± 0.2 (M_⊙), 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.

Note:

Accepted for publication in MNRAS. 20 pages, 15 figures

galaxies: active
galaxies: evolution
quasars: emission lines
quasars: individual: IRAS 05589+2828, 2MASX J06021107 + 2828382
galaxies: Seyfert

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