Evolution of Structure in Late-type Spiral Galaxies I: Ionized Gas Kinematics in NGC 628

Abstract

We study two dimensional Fabry-Perot interferometric observations of the nearby face-on late-type spiral galaxy, NGC 628, in order to analyse the ionized gas component of the interstellar medium. Covering the galaxy out to a radius larger than 12 kpc, and with a spatial sampling of 1.6 arcsec, we investigate the large-scale dynamics as well as feedback from individual HII regions into their surrounding medium. We study the role of gravitational perturbations along with that of external triggers which can disturb the kinematics and morphology of NGC 628. We verify the presence of an inner rapidly rotating disc-like component in NGC 628, which we interpret as caused by slow secular evolution of the large-scale spiral arms and oval structure. In combination with auxiliary data, we find indication for that gas is falling in from the outer parts towards the central regions, where a nuclear ring has formed at the location of the inner Lindblad resonance radius of an m=2 perturbation which could help build a pseudo-bulge in NGC 628. Moreover, we calculate radial profiles of the emission-line velocity dispersion which we use to study the role of feedback from individual HII regions. The mean velocity dispersion for the ionized gas (even when excluding pixels belonging to individual HII regions) is almost constant out to 12 kpc, although it varies from 14 to 20 km/s, with a steady decline in the outer parts. The current paper demonstrates a number of tools that we have developed for building a solid frame work for studying the evolution of structure in spiral galaxies using two dimensional kinematic observations.

arXiv commentAccepted for publications in A&A. 13 pages, 7 figures, and including a calatogue of 376 HII regions with calibrated luminosities. Please find high-resolution version on http://www.astro.su.se/~kambiz/DOC/paper-N628.ps.gz

References in corpus (35)

• Secular Evolution and the Formation of Pseudobulges in Disk Galaxies
• The SAURON project. I. The panoramic integral-field spectrograph
• Kinemetry: a generalisation of photometry to the higher moments of the line-of-sight velocity distribution
• Nested and Single Bars in Seyfert and Non-Seyfert Galaxies
• The Central Region of Barred Galaxies: Molecular Environment, Starbursts, and Secular Evolution
• The SAURON project - VII. Integral-field absorption and emission-line kinematics of 24 spiral galaxy bulges
• Measuring non-axisymmetry in spiral galaxies
• The Central Region in M100: Observations and Modeling
• The Formation of Disk-Bulge-Halo Systems and the Origin of the Hubble Sequence
• Dynamics of embedded bars and the connection with AGN. I. ISAAC/VLT stellar kinematics
• Circumnuclear Dust in Nearby Active and Inactive Galaxies. I. Data
• A Search for Kinematic Evidence of Radial Gas Flows in Spiral Galaxies
• H-alpha Kinematics of the SINGS Nearby Galaxies Survey. I
• Galactic Warps Induced By Cosmic Infall
• Streaming Motions Towards the Supermassive Black Hole in NGC 1097
• Where do the disks of spiral galaxies end?
• Late-type galaxies observed with SAURON. Two-dimensional stellar and emission-line kinematics of 18 spirals
• Gas and stellar dynamics in NGC 1068. Probing the galactic gravitational potential
• The Star Formation History and Evolution of the Circumnuclear Region of M100
• Generation of galactic disc warps due to intergalactic accretion flows onto the disc
• Simulations of Normal Spiral Galaxies
• Ionized gas kinematics and massive star formation in NGC 1530
• A Bar Signature and Central Disk in the Gaseous and Stellar Velocity Fields of NGC5448
• On the Dynamical and Physical State of the `Diffuse Ionized Medium' in Nearby Spiral Galaxies
• Gemini/GMOS IFU stellar kinematics of the nuclear region of six nearby active galaxies
• Massive star formation in the central regions of spiral galaxies
• Do Bulges of Early- and Late-type Spirals Have Different Morphology?
• The internal dynamical equilibrium of HII regions: a statistical study
• The Connection Between Barstrength and Circumnuclear Dust Structure
• Improved 3D Fabry-Perot Data Reduction Techniques
• An Investigation of Diffuse Interstellar Gas toward a Large, Low Extinction Window into the Inner Galaxy
• Pseudobulges in the Disk Galaxies NGC 7690 and NGC 4593
• Cool Gas and Massive Stars - the Nuclear Ring in M100
• Lifetime of nuclear velocity dispersion drops in barred galaxies
• Dark and luminous matter in the NGC 3992 group of galaxies, II. The dwarf companions UGC 6923, UGC 6940, UGC 6969, and the Tully-Fisher relation

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