SIMBAD references

We analyse two-dimensional near-infrared K-band spectra from the inner 660x315pc² of the Seyfert galaxy NGC7582 obtained with the Gemini near-infrared spectrograph integral field unit at a spatial resolution of ~50pc and spectral resolving power R ~ 5900. The nucleus harbours an unresolved source well reproduced by a blackbody of temperature T ~ 1050K, which we attribute to emission by circumnuclear dust located closer than 25pc from the nucleus, with a total mass of ~3 x10^–3M_☉. Surrounding the nucleus, we observe a ring of active star formation, apparently in the Galactic plane, with a radius of ~190pc, an age of ~5Myr and a total mass of ionized gas of ~3x10⁶M_☉. The radiation of the young stars in the ring accounts for at least 80 per cent of the ionization observed in the Brγ emitting gas, the remaining being due to the radiation emitted by the active nucleus. The stellar kinematics was derived using the CO absorption band at 2.29µm and reveals: (i) a distorted rotation pattern in the radial velocity field with kinematic centre apparently displaced from the nuclear source by a few tens of parsec; (ii) a high-velocity dispersion in the bulge of σ_*= 170km/s and (iii) a partial ring of σ_*= 50km/s, located close to the Brγ emitting ring, but displaced by ~50pc towards the nucleus, interpreted as due to stars formed from cold gas in a previous burst of star formation. The kinematics of the ionized gas shows a similar rotation pattern to that of the stars, plus a blueshifted component with velocities ≥100km/s interpreted as due to an outflow along the ionization cone, which was partially covered by our observations. The mass outflow rate in the ionized gas was estimated as, which is one order of magnitude larger than the accretion rate to the active galactic nuclei (AGN), indicating that the outflowing gas does not originate in the AGN, but is instead the circumnuclear gas from the host galaxy being pushed away by a nuclear outflow. The flux distribution and kinematics of the hot molecular gas, traced by the H₂λ2.22µm emission line, suggest most of this gas is in the Galactic plane. An excess blueshift along PA ~ -70°, where a nuclear bar has been observed, can be interpreted as an inflow towards the nucleus. We thus conclude that the H₂ kinematics traces the feeding of the AGN, while the ionized gas kinematics traces its feedback via the outflows. An AGN-starburst connection in the nucleus of NGC7582 is supported by the ratio between the mass accretion rate and the star formation rate in the circumnuclear region of ~0.26 per cent, which is close to the expected relation between the mass of the supermassive black holes and that of the host galaxy bulge in galaxies (the Magorrian relation).