Publication Date:
2020-08-18
Description:
We investigate the ionized gas excitation and kinematics in the inner $4.3, imes , 6.2$ kpc2 of the merger radio galaxy 4C+29.30. Using optical integral field spectroscopy with the Gemini North Telescope, we present flux distributions, line-ratio maps, peak velocities and velocity dispersion maps as well as channel maps with a spatial resolution of $approx! 955,$ pc. We observe high blueshifts of up to $sim! -650,$$
m km, s^{-1}$ in a region ∼1 arcsec south of the nucleus (the southern knot – SK), which also presents high velocity dispersions ($sim! 250,$$
m km, s^{-1}$), which we attribute to an outflow. A possible redshifted counterpart is observed north from the nucleus (the northern knot – NK). We propose that these regions correspond to a bipolar outflow possibly due to the interaction of the radio jet with the ambient gas. We estimate a total ionized gas mass outflow rate of $dot{M}_{mathrm{ out}} = 25.4 ^{+11.5 }_{ -7.5},$ M⊙ yr−1with a kinetic power of $dot{E} = 8.1 ^{+10.7 }_{ -4.0} imes 10^{42},$ erg s−1, which represents $5.8 ^{+7.6 }_{ -2.9} {{
m per cent}}$ of the active galactic nucleus (AGN) bolometric luminosity. These values are higher than usually observed in nearby active galaxies with the same bolometric luminosities and could imply a significant impact of the outflows in the evolution of the host galaxy. The excitation is higher in the NK – that correlates with extended X-ray emission, indicating the presence of hotter gas – than in the SK, supporting a scenario in which an obscuring dust lane is blocking part of the AGN radiation to reach the southern region of the galaxy.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
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