The complex multi-component outflow of the Seyfert galaxy NGC 7130. (arXiv:2011.02937v5 [astro-ph.GA] UPDATED)

The complex multi-component outflow of the Seyfert galaxy NGC 7130. (arXiv:2011.02937v5 [astro-ph.GA] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Comeron_S/0/1/0/all/0/1">S. Comer&#xf3;n</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Knapen_J/0/1/0/all/0/1">J. H. Knapen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Almeida_C/0/1/0/all/0/1">C. Ramos Almeida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Watkins_A/0/1/0/all/0/1">A. E. Watkins</a>

AGN are a key ingredient for understanding galactic evolution. AGN-driven
outflows are one of the manifestations of feedback. The AO mode for MUSE at the
VLT permits to study the innermost tens of parsecs of nearby AGN in the
optical. We present a detailed analysis of the ionised gas in the central
regions of NGC 7130, an archetypical composite Seyfert and nuclear starburst
galaxy. We achieve an angular resolution of 0.17$^{primeprime}$ (50 pc). We
performed a multi-component analysis of the main ISM lines and identified nine
kinematic components, six of which correspond to the outflow. The outflow is
biconic and has velocities of a few $100,{rm km,s^{-1}}$ with respect to the
disc. We decompose the approaching side of the outflow into a broad and a
narrow component with typical velocity dispersions below and above
$sim200,{rm km,s^{-1}}$, respectively. The blueshifted narrow component has
substructure, in particular a collimated plume aligned with the radio jet,
indicating that it may be jet-powered. The redshifted lobe is composed of two
Narrow Components and a Broad Component. An additional redshifted component is
seen outside the main outflow axis. Line ratio diagnostics indicate that the
outflow gas in the main axis is AGN-powered whereas the off-axis component has
LINER properties. The ionised gas mass outflow rate is
$dot{M}=1.2pm0.7,M_{odot},{rm yr^{-1}}$ and the kinetic power is
$dot{E}_{rm kin}=(2.7pm2.0)times10^{41},{rm erg,s^{-1}}$, which
corresponds to $F_{rm kin}=0.12pm0.09%$ of the bolometric AGN power. The
combination of high angular resolution integral field spectroscopy and a
careful multi-component decomposition allows a uniquely detailed view of the
outflow in NGC 7130, illustrating that AGN kinematics are more complex than
traditionally derived from less sophisticated data and analyses. (abridged)

AGN are a key ingredient for understanding galactic evolution. AGN-driven
outflows are one of the manifestations of feedback. The AO mode for MUSE at the
VLT permits to study the innermost tens of parsecs of nearby AGN in the
optical. We present a detailed analysis of the ionised gas in the central
regions of NGC 7130, an archetypical composite Seyfert and nuclear starburst
galaxy. We achieve an angular resolution of 0.17$^{primeprime}$ (50 pc). We
performed a multi-component analysis of the main ISM lines and identified nine
kinematic components, six of which correspond to the outflow. The outflow is
biconic and has velocities of a few $100,{rm km,s^{-1}}$ with respect to the
disc. We decompose the approaching side of the outflow into a broad and a
narrow component with typical velocity dispersions below and above
$sim200,{rm km,s^{-1}}$, respectively. The blueshifted narrow component has
substructure, in particular a collimated plume aligned with the radio jet,
indicating that it may be jet-powered. The redshifted lobe is composed of two
Narrow Components and a Broad Component. An additional redshifted component is
seen outside the main outflow axis. Line ratio diagnostics indicate that the
outflow gas in the main axis is AGN-powered whereas the off-axis component has
LINER properties. The ionised gas mass outflow rate is
$dot{M}=1.2pm0.7,M_{odot},{rm yr^{-1}}$ and the kinetic power is
$dot{E}_{rm kin}=(2.7pm2.0)times10^{41},{rm erg,s^{-1}}$, which
corresponds to $F_{rm kin}=0.12pm0.09%$ of the bolometric AGN power. The
combination of high angular resolution integral field spectroscopy and a
careful multi-component decomposition allows a uniquely detailed view of the
outflow in NGC 7130, illustrating that AGN kinematics are more complex than
traditionally derived from less sophisticated data and analyses. (abridged)

http://arxiv.org/icons/sfx.gif

Comments are closed.