The puzzle of the polar structure in NGC 4650A
arXiv:astro-ph/0110249 · doi:10.1086/324728
Abstract
This work presents new surface photometry and two-dimensional modeling of the light distribution of the Polar Ring Galaxy NGC 4650A, based on near-infrared (NIR) observations and high resolution optical imaging acquired during the Hubble Heritage program. The NIR and optical integrated colors of the S0 and the polar ring, and their scale parameters, are compared with those for standard galaxy morphological types. The polar structure appears to be a disk of a very young age, while the colors and light distribution of the host galaxy do not resemble that of a typical early-type system. We compare these observational results with the predictions from different formation scenarios for polar ring galaxies. The peculiarities of the central S0 galaxy, the polar disk structure and stellar population ages suggest that the polar ring galaxy NGC 4650A may be the result of a dissipative merger event, rather than of an accretion process.
26 pages, 10 figures, accepted for publication to the Astronomical Journal
Cited by in corpus (30)
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- Chemical abundances in the polar disk of NGC4650A: implications for cold accretion scenario
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- Stellar kinematics for the central spheroid in the Polar Disk Galaxy NGC4650A
- Dilution in elliptical galaxies: Implications for the relation between metallicity, stellar mass and star formation rate
- Near-Infrared photometry in the J, H and Kn bands for Polar Ring Galaxies: I. Data, structural parameters
- Optical Imaging and Spectroscopy of the Edge-On Sbc Galaxy UGC10043: Evidence for a Galactic Wind and a Peculiar Triaxial Bulge
- The Halo Shape and Evolution of Polar Disc Galaxies
- Near-Infrared photometry in the J, H and Kn bands for Polar Ring Galaxies: II. Global Properties
- Searching for Stars in Compact High-Velocity Clouds. I First Results from VLT and 2MASS
- Stellar Motions in the Polar Ring Galaxy NGC 4650A
- The Stellar Content of the Polar Rings in the Galaxies NGC 2685 and NGC 4650A
- Molecular content of polar-ring galaxies
- Chemical abundances of the PRGs UGC7576 and UGC9796. I. Testing the formation scenario
- Mapping the inner regions of the polar disk galaxy NGC4650A with MUSE
- Spectral decomposition of the stellar kinematics in the polar disk galaxy NGC 4650A
- The polar ring galaxy AM1934-563 revisited
- Compact stellar systems in the polar ring galaxies NGC 4650A and NGC 3808B: Clues to polar disk formation
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- New photometric investigation of the double ringed galaxy ESO474-G26. Unveiling the formation scenario
- On stability and spiral patterns in polar disks
- Surface Photometry and Metallicity of the Polar Ring Galaxy A0136-0801
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- One of Everything: The Breakthrough Listen Exotica Catalog
- A Forming Wide Polar Ring Galaxy at z~0.05 in the VST Deep Field of the Fornax Cluster