Kinematics of Ionised Gas in the Barred Seyfert Galaxy NGC 4151

Abstract

We have determined the structure and kinematics of ionised gas in the weak oval bar of the archetypal Seyfert 1 galaxy, NGC 4151, using the TAURUS Fabry-Perot interferometer to simultaneously map the distribution and kinematics of Hbeta emission. We also present broad-band ultraviolet imaging of the host galaxy, obtained with XMM-Newton, that shows the detailed distribution of star formation in the bar and in the optically-faint outer spiral arms. We compare the distribution and kinematics of ionised gas with that previously determined in neutral hydrogen by Mundell & Shone; we suggest that the distribution of bright, patchy UV emission close to the HI shocks is consistent with ionisation by star clusters that have formed in compressed pre-shock gas. These clusters then travel ballistically through the gaseous shock to ionise gas downstream along the leading edge of the bar. In addition, we detect, for the first time, ionised gas within the shock itself which is streaming to smaller radii in the same manner as the neutral gas.

arXiv comment9 pages, 8 figures. Accepted by MNRAS

References in corpus (9)

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Cited by in corpus (11)

• The SAURON project - VII. Integral-field absorption and emission-line kinematics of 24 spiral galaxy bulges
• The Central Kiloparsec of Seyfert and Inactive Host Galaxies: a Comparison of Two-Dimensional Stellar and Gaseous Kinematics
• A Deep Chandra ACIS Study of NGC 4151. III. the Line Emission and Spectral Analysis of the Ionization Cone
• Massive Clusters in the Inner Regions of NGC 1365: Cluster Formation and Gas Dynamics in Galactic Bars
• Extended X-ray Emission in the HI Cavity of NGC 4151: Galaxy-scale AGN Feedback?
• Spin Parity of Spiral Galaxies I -- Corroborative Evidence for Trailing Spirals
• The relation between dynamics and star formation in barred galaxies
• Cold Molecular Gas in the Inner Two Kiloparsec of NGC4151
• Molecular Gas and Star Formation Properties in the Central and Bar Regions of NGC 6946
• 3D Studies of Neutral and Ionised Gas and Stars in Seyfert and Inactive Galaxies
• LeMMINGs. V. Nuclear activity and bulge properties: a detailed multi-component decomposition of $e$-MERLIN Palomar galaxies with $HST$