The RINGS Survey I: Halpha and HI Velocity Maps of Galaxy NGC 2280

Abstract

Precise measurements of gas kinematics in the disk of a spiral galaxy can be used to estimate its mass distribution. The Southern African Large Telescope (SALT) has a large collecting area and field of view, and is equipped with a Fabry-Perot interferometer that can measure gas kinematics in a galaxy from the Halpha line. To take advantage of this capability, we have constructed a sample of 19 nearby spiral galaxies, the RSS Imaging and Spectroscopy Nearby Galaxy Survey (RINGS), as targets for detailed study of their mass distributions and have collected much of the needed data. In this paper, we present velocity maps produced from Halpha Fabry-Perot interferometry and HI aperture synthesis for one of these galaxies, NGC 2280, and show that the two velocity measurements are generally in excellent agreement. Minor differences can mostly be attributed to the different spatial distributions of the excited and neutral gas in this galaxy, but we do detect some anomalous velocities in our Halpha velocity map of the kind that have previously been detected in other galaxies. Models produced from our two velocity maps agree well with each other and our estimates of the systemic velocity and projection angles confirm previous measurements of these quantities for NGC 2280.

arXiv commentRevised version submitted to AJ. 14 pages, 11 figures

References in corpus (47)

• The Structure of Cold Dark Matter Halos
• How Do Galaxies Get Their Gas?
• Galaxy Bimodality due to Cold Flows and Shock Heating
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• Response of dark matter halos to condensation of baryons: cosmological simulations and improved adiabatic contraction model
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• The Diversity and Similarity of Simulated Cold Dark Matter Halos
• How supernova feedback turns dark matter cusps into cores
• The large-scale structure of the Universe
• The 2MASS Redshift Survey - Description and Data Release
• Cuspy No More: How Outflows Affect the Central Dark Matter and Baryon Distribution in Lambda CDM Galaxies
• Constraints from Dynamical Friction on the Dark Matter Content of Barred Galaxies
• The 1000 Brightest HIPASS Galaxies: HI Properties
• Forming Realistic Late-Type Spirals in a LCDM Universe: The Eris Simulation
• The redshift dependence of the structure of massive LCDM halos
• A Digital Archive of HI 21 cm Line Spectra of Optically-targeted Galaxies
• The dependence of dark matter profiles on the stellar to halo mass ratio: a prediction for cusps vs cores
• Mass loss from dwarf spheroidal galaxies: the origins of shallow dark matter cores and exponential surface brightness profiles
• Cold dark matter heats up
• The central slope of dark matter cores in dwarf galaxies: Simulations vs. THINGS
• A Revised Model for the Formation of Disk Galaxies: Low Spin and Dark-Halo Expansion
• Does the Milky Way have a Maximal Disk?
• Hierarchical formation of bulgeless galaxies: Why outflows have low angular momentum
• A Universal Density Profile for Dark and Luminous Matter?
• The DiskMass Survey. I. Overview
• High Resolution Rotation Curves of Low Surface Brightness Galaxies
• Modeling Non-Circular Motions in Disk Galaxies: Application to NGC 2976
• The Westerbork HI Survey of spiral and irregular galaxies III: HI observations of early-type disk galaxies
• GHASP : An Halpha kinematic survey of spiral and irregular galaxies - VI. New Halpha data cubes for 108 galaxies
• The Disk and Dark Halo Mass of the Barred Galaxy NGC 4123. II. Fluid-Dynamical Models
• The Compression of Dark Matter Halos by Baryonic Infall
• Is there Evidence for Flat Cores in the Halos of Dwarf Galaxies?: The Case of NGC 3109 and NGC 6822
• Transient spirals as superposed instabilities
• An observational and theoretical view of the radial distribution of HI gas in galaxies
• The rotation curves of dwarf galaxies: a problem for Cold Dark Matter?
• Galaxy Disks are Submaximal
• The Rotation Velocity Attributable to Dark Matter at Intermediate Radii in Disk Galaxies
• Hiding Cusps in Cores: Kinematics of Disk Galaxies in Triaxial Dark Matter Halos
• Do Baryons Alter the Halos of Low Surface Brightness Galaxies?
• BhaBAR: Big Halpha kinematical sample of BARred spiral galaxies - I. Fabry-Perot Observations of 21 galaxies
• Quantifying Non-circular Streaming Motions in Disc Galaxies
• Modeling the Gas Flow in the Bar of NGC 1365
• Detection and Measurement from Narrowband Tunable Filter Scans
• An Imaging Fabry-Perot System for the Robert Stobie Spectrograph on the Southern African Large Telescope

Cited by in corpus (4)

• Spin Parity of Spiral Galaxies I -- Corroborative Evidence for Trailing Spirals
• Scanning Fabry--Perot Interferometer of the 6-m SAO RAS Telescope
• Reduction of CCD observations made with a scanning Fabry--Perot interferometer. III. Wavelength scale refinement
• The RINGS Survey III: Medium-Resolution Halpha Fabry-Perot Kinematic Dataset