The gas kinematics in the Mrk 533 nucleus and circumnuclear region: a gaseous outflow

Abstract

We present an analysis of 3D spectra of Mrk 533, observed with the integral‐field spectrograph MultiPupil Fiber Spectrograph (MPFS) and using the Fabry‐Perot Interferometer (FPI) of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) 6‐m telescope. We found emissions of gas from the active type 2 Seyfert nucleus in the centre and also from the H ii regions in a spiral structure and a circumnuclear region. The gas kinematics shows regular non‐circular motions in the wide range of galactocentric distances from 500 pc up to 15 kpc. The maps of inward and outward radial motions of the ionized gas were constructed. We found that the narrow‐line region (NLR) is composed of at least two (probably three) kinematically separated regions. We detect a stratification in the NLR of Mrk 533 with the outflow velocity ranging from 20–50 km s−1 to 600–700 km s−1, respectively, on the radial distances of ∼2.5 and ∼1.5 kpc. The maximal outflow velocity comes from the nucleus and corresponds to the position of the observed radio structure, which is assumed to be created in an approaching jet. We suggest that these ionized gas outflows are triggered by the radio jet intrusion in an ambient medium.

3D spectroscopy of merger Seyfert galaxy Mrk 334: nuclear starburst, superwind and the circumnuclear cavern

“…An alternative explanation of the observed gas kinematics is a jet–clouds interaction similar to that observed in Mrk 3 (Capetti et al 1999) or Mrk 533 (Smirnova et al 2007). However, this mechanism is unlikely for Mrk 334.…”

“…The preliminary data reduction steps were described earlier (Moiseev, Valdés & Chavushyan 2004; Smirnova et al 2007). Reduction yields a ‘data cube’, where each pixel in the 16 × 16 arcsec 2 field has a spectrum associated with it.…”

“…Our work is aimed to investigate the relation between the gas kinematics, morphological features and nuclear activity in individual galaxies as well as the mechanisms of the central region feeding. We have already published the results concerning Mrk 315 (Ciroi et al 2005), NGC 6104 (Smirnova, Moiseev & Afanasiev 2006) and Mrk 533 (Smirnova et al 2007). In this paper, we report a detailed study of Mrk 334.…”

Fuelling of Circumnuclear Regions: 3D Spectroscopy View.

“…Amram et al (2003) have published the Hα velocity field of this main member of the compact group HCG96 and mentioned an asymmetry in the different sides of its rotation curve. We present a careful analysis of the velocity fields in the different emission lines and found numerous peculiarities in the gas motion (Smirnova et al, 2006b): (i) The streaming motions along the bar were found from a 'tilted-ring' velocity analysis. (ii) The map of radial motions in the disc shows the gas inflow along the Northern arm (5 < r < 15 ).…”

Efficiency tests for estimating the gas and stellar population parameters in Type 2 objects

“…The goal of our tests is not to model the stellar populations of the host galaxies, which can be complicated by the presence of star forming regions (see e.g. Smirnova et al, 2007;Popović et al, 2009). On the contrary, we study under which conditions an aged stellar population can still be recovered in presence of an overlapped AGN continuum.…”