Dust and Ionized Gas in Nine Nearby Early-Type Galaxies Imaged with the HST Advanced Camera for Surveys

Abstract

We present $V$ and $I$ continuum images and H$\alpha$+[N II] maps of nine early-type galaxies observed with the Wide Field Channel of the Advanced Camera for Surveys on the Hubble Space Telescope. Dust and ionized gas are detected in all galaxies. The optical nebulae are primarily concentrated on the nuclei and extend out to radii of a few hundred parsecs, in compact clumps, filaments, or disks. Two galaxies, NGC 6166 and NGC 6338, also possess diffuse, ionized filaments on kiloparsec scales. The ionized gas is entirely contained within the nuclear disks of ESO 208-G021, NGC 3078, and NGC 7720. In the radio-loud galaxy NGC 6166, emission-line filaments are detected along the radio lobes, possibly as a result of shock ionization. A wide range of ionized gas masses, $M_g\approx 7\times 10^2-3\times 10^6$ $M_{\odot }$, are calculated from the observed fluxes. Even in this small sample, the orientation of the ionized material correlates well with the major or minor axis of the galaxies, consistent with an external origin for the dust and gas.

Accepted for publication in the Astronomical Journal, to appear Dec 4, 2004. 14 pages, 4 figures

References in corpus (3)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Hot Gas In and Around Elliptical Galaxies
• Circumnuclear Dust in Nearby Active and Inactive Galaxies. I. Data

Cited by in corpus (38)

• The SAURON project - V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies
• The SAURON project - III. Integral-field absorption-line kinematics of 48 elliptical and lenticular galaxies
• The Herschel Reference Survey: Dust in Early-Type Galaxies and Across the Hubble Sequence
• Nearby early-type galaxies with ionized gas.IV. Origin and powering mechanism of the ionized gas
• The Near-infrared S0 Survey III: Morphology of 15 Southern Early-type Disk Galaxies
• A giant elliptical galaxy with a lightweight initial mass function
• The Atlas3D project -- XXXI. Nuclear radio emission in nearby early-type galaxies
• The Nuclear Near-Infrared Spectral Properties of Nearby Galaxies
• A volume-limited sample of X-ray galaxy groups and clusters - II. X-ray cavity dynamics
• Study of LINER sources with broad H(alpha) emission. Spectral energy distribution and multiwavelength correlations
• AGN-stimulated Cooling of Hot Gas in Elliptical Galaxies
• Metallicity Gradients at Large Galactocentric Radii Using the Near-infrared Calcium Triplet
• Halpha Imaging of the Herschel Reference Survey. The star formation properties of a volume-limited, K-band-selected sample of nearby late-type galaxies
• Ionized gas in E/S0 galaxies with dust lanes
• A volume-limited sample of X-ray galaxy groups and clusters: III. Central abundance drops
• The Structure and Star Formation History of Early-Type Galaxies in the UDF/GRAPES Survey
• Star-forming accretion flows and the low luminosity nuclei of giant elliptical galaxies
• Lyman continuum leaking galaxies - Search strategies and local candidates
• Deep Chandra Observations of Abell 2199: the Interplay between Merger-Induced Gas Motions and Nuclear Outbursts in a Cool Core Cluster
• Extended soft X-ray emission in 3CR radio galaxies at z < 0.3: High Excitation and Broad Line Galaxies
• Systematic study of X-ray Cavities in the brightest galaxy of the Draco Constellation NGC 6338
• The MASSIVE Survey VI: The Spatial Distribution and Kinematics of Warm Ionized Gas in the Most Massive Local Early-type Galaxies
• The properties of dwarf spheroidal galaxies in the Cen A group: Stellar populations, internal dynamics, and a heart-shaped Halpha ring
• Gravitational Stability of Circumnuclear Disks in Elliptical Galaxies
• Probing Evolutionary Population Synthesis Models in the Near Infrared with Early Type Galaxies
• Building a cluster: shocks, cavities, and cooling filaments in the group-group merger NGC 6338
• Dissolved Massive Metal-Rich Globular Clusters Can Cause the Range of UV Upturn Strengths Found among Early-type Galaxies
• Study of Dust and Ionized gas in Early-type Galaxies
• Dust and Ionized Gas Association in E/S0 Galaxies with Dust Lanes: Clues to their Origin
• Stellar and Dust Properties of Local Elliptical Galaxies: Clues to the Onset of Nuclear Activity
• Accretion-Inhibited Star Formation in the Warm Molecular Disk of the Green-valley Elliptical Galaxy NGC 3226
• Revealing A Head-on Major Merger in the Nearby NGC 6338 Group with Chandra and VLA observations
• SDSS-IV MaNGA: The Nature of an Off-galaxy H$\alpha$ Blob -- A Multi-wavelength View of Offset Cooling in a Merging Galaxy Group
• The importance of the diffuse ionized gas for interpreting galaxy spectra
• Spatially Resolved [O III] Emission Line Kinematics of Reverberation-Mapped AGNs with the Keck Cosmic Web Imager
• Orbital motion of NGC 6166 (3C 338) and its impact on the jet morphology at kiloparsec scales
• Spatially-resolved Galactic HII regions observed by LAMOST medium-Resolution Spectroscopic Survey of Nebulae (LAMOST MRS-N)
• Deep neutral hydrogen observations of the early-type galaxy NGC 2768: collided by a newly discovered satellite galaxy?