Neutral Gas Distribution and Kinematics of the Nearly Face-on Spiral Galaxy NGC 1232
arXiv:astro-ph/9907278 · doi:10.1086/301082
Abstract
We have analyzed high velocity resolution HI synthesis observations of the nearly face-on Sc galaxy NGC 1232. The neutral gas distribution extends well beyond the optical extent of the galaxy. As expected, local peaks in the HI column density are associated with the spiral arms. Further, the HI column density drops precipitously near the center of the galaxy. Closed contours in the velocity field suggest either that the system is warped, or that the rotation curve declines. The velocity dispersion is approximately constant throughout the system, with a median value of 9.9 +/- 1.8 km/s. When corrected for rotational broadening, there is no indication of a radial trend in the neutral gas velocity dispersion in this galaxy.
14 pages of text, 10 pages of figures. Accepted to the AJ
References in corpus (5)
- Spectroscopy of Outlying H II Regions in Spiral Galaxies: Abundances and Radial Gradients
- Discovery of Recent Star Formation in the Extreme Outer Regions of Disk Galaxies
- Differential Rotation and Turbulence in Extended HI Disks
- The Extreme Outer Regions of Disk Galaxies: I. Chemical Abundances of HII Regions
- Abundances in Spiral Galaxies: Evidence for Primary Nitrogen Production
Cited by in corpus (40)
- The Role of Pressure in GMC Formation II: The H_2 - Pressure Relation
- The Metallicity-Luminosity Relation, Effective Yields, and Metal Loss in Spiral and Irregular Galaxies
- What is Driving the HI Velocity Dispersion?
- A Unified Model for Galactic Discs: Star Formation, Turbulence Driving, and Mass Transport
- Oxygen and nitrogen abundances in nearby galaxies. Correlations between oxygen abundance and macroscopic properties
- Accretion-Driven Turbulence as Universal Process: Galaxies, Molecular Clouds, and Protostellar Disks
- Gas-Phase Oxygen Gradients in Strongly Interacting Galaxies: I. Early-Stage Interactions
- Three Dimensional Hydrodynamic Simulations of Multiphase Galactic Disks with Star Formation Feedback: I. Regulation of Star Formation Rates
- The Abundance Properties of Nearby Late-Type Galaxies.I. The Data
- The properties of the ISM in disc galaxies with stellar feedback
- Is Turbulence in the Interstellar Medium Driven by Feedback or Gravity? An Observational Test
- Regulation of Star Formation Rates in Multiphase Galactic Disks: Numerical Tests of the Thermal/Dynamical Equilibrium Model
- Magnetorotationally-Driven Galactic Turbulence and the Formation of Giant Molecular Clouds
- Models of Vertically Stratified Two-Phase ISM Disks with MRI-Driven Turbulence
- Saturated-State Turbulence and Structure from Thermal and Magnetorotational Instability in the ISM: Three-Dimensional Numerical Simulations
- Gravitational Runaway and Turbulence Driving in Star-Gas Galactic Disks
- Radial Metallicity Distribution Breaks at Corotation Radius in Spiral Galaxies
- Mass Transport and Turbulence in Gravitationally Unstable Disk Galaxies. I: The Case of Pure Self-Gravity
- LambdaCDM Halo Density Profiles: where do actual halos converge to NFW ones?
- Drivers of HI Turbulence in Dwarf Galaxies
- The JCMT Nearby Galaxies Legacy Survey IV. Velocity Dispersions in the Molecular Interstellar Medium in Spiral Galaxies
- Interstellar Turbulence Driving by Galactic Spiral Shocks
- Global HI Kinematics in Dwarf Galaxies
- 3D spectroscopy with VLT/GIRAFFE - II: Are Luminous Compact Galaxies merger remnants ?
- Kinematic classifications of local interacting galaxies: implications for the merger/disk classifications at high-z
- Star formation in grand-design, spiral galaxies. Young, massive clusters in the near-infrared
- GSH 138-01-94, an old supernova remnant in the far outer Galaxy
- Oxygen and nitrogen abundances in Virgo and field spirals
- WALLABY Early Science -- IV. ASKAP HI imaging of the nearby galaxy IC 5201
- Spin Parity of Spiral Galaxies I -- Corroborative Evidence for Trailing Spirals
- Determining the Timescale over Which Stellar Feedback Drives Turbulence in the ISM: A Study of four Nearby Dwarf Irregular Galaxies
- Timescales on which Star Formation Affects the Neutral ISM
- Searching for Milky Way twins: Radial abundance distribution as a strict criterion
- 3D spectroscopy with VLT/GIRAFFE: I- the true Tully Fisher relationship at z~0.6
- Did VV~29 collide with a dark Dark-Matter halo?
- Spectroscopic study of the HII regions in the NGC 1232 galaxy
- Star Formation Rate Distribution in the Galaxy NGC 1232
- Cumulative Oxygen Abundances of Spiral Galaxies
- X-ray discovery of a dwarf-galaxy galaxy collision
- X-raying the galaxy pair Arp 41: no collision in NGC 1232 and three ultraluminous sources in NGC 1232A