LABOCA and MAMBO-2 imaging of the dust ring of the Sombrero galaxy (NGC 4594)
arXiv:0805.4791 · doi:10.1051/0004-6361:200810048
Abstract
The Sombrero galaxy (NGC 4594) is an Sa galaxy with a symmetric dust ring. We have used the Large APEX BOlometer CAmera (LABOCA) at 870 micron and the MAx-Planck Millimeter BOlometer (MAMBO-2) at 1.2 mm to detect the dust ring for the first time at submillimetre and millimetre wavelengths. We have constructed a model of the galaxy to separate the active galactic nucleus (AGN) and dust ring components. The ring radius at both 870 micron and 1.2 mm agrees well with the radius determined from optical absorption and atomic gas studies. The spectral energy distribution of the ring is well fitted by a single grey-body with dust emissivity index beta=2 and a dust temperature T_d=18.4 K. The dust mass of the ring is found to be 1.6\pm0.2x10^7Msun which, for a Galactic gas-to-dust ratio, implies a gas mass that is consistent with measurements from the literature.
arXiv comment4 pages including 3 figures and 2 tables. Accepted for publication in A&A Letters. Full resolution version at http://www.strw.leidenuniv.nl/~vlahakis/vlahakis-highres.pdf
References in corpus (8)
- Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium
- The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
- SINGS: The SIRTF Nearby Galaxies Survey
- Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
- ISM Properties in Low-Metallicity Environments III. The Dust Spectral Energy Distributions of II Zw 40, He 2-10 and NGC 1140
- The Spectral Energy Distribution of Dust Emission in the Edge-on Spiral Galaxy NGC 4631 as seen with Spitzer and JCMT
- Radio polarization and sub-mm observations of the Sombrero galaxy (NGC 4594) - Large-scale magnetic field configuration and dust emission
- Spitzer and JCMT Observations of the Active Galactic Nucleus in the Sombrero Galaxy (NGC 4594)
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- Resolving accretion flows in nearby active galactic nuclei with the Event Horizon Telescope
- A Molecular Gas Ring Hidden in the Sombrero Galaxy