Interacting galaxy NGC4656 and its unusual dwarf companion
arXiv:1705.03523 · doi:10.1093/mnras/stx1158
Abstract
We studied the nearby edge-on galaxy NGC4656 and its dwarf low surface brightness companion with the enhanced UV brightness, NGC4656UV, belonging to the interacting system NGC4631/56. Regular photometric structure and relatively big size of NGC4656UV allows to consider this dwarf galaxy as a separate group member rather than a tidal dwarf. Spectral long-slit observations were used to obtain the kinematical parameters and gas-phase metallicity of NGC4656UV and NGC4656. Our rough estimate of the total dynamical mass of NGC4656UV allowed us to conclude that this galaxy is the dark-matter dominated LSB dwarf or ultra diffuse galaxy. Young stellar population of NGC4656UV, as well as strong local non-circular gas motions in NGC4656 and the low oxygen gas abundance in the region of this galaxy adjacent to its dwarf companion, give evidence in favour of the accretion of metal-poor gas onto the discs of both galaxies.
arXiv comment8 pages, 2 tables, 9 figures, accepted for publication in MNRAS
References in corpus (22)
- The Host Galaxies of AGN
- Theoretical Modeling of Starburst Galaxies
- Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
- HyperLEDA. III. The catalogue of extragalactic distances
- Updated Nearby Galaxy Catalog
- The SCORPIO focal reducer
- Evolutionary synthesis of galaxies at high spectral resolution with the code PEGASE-HR
- New calibrations for abundance determinations in HII regions
- Eliminating Error in the Chemical Abundance Scale for Extragalactic HII Regions
- The Abundance Properties of Nearby Late-Type Galaxies.I. The Data
- New Colour-Mass to Light Relations: the role of the Asymptotic Giant Branch phase and of interstellar dust
- IZI: Inferring the Gas Phase Metallicity (Z) and Ionization Parameter (q) of Ionized Nebulae using Bayesian Statistics
- The nearest ultra diffuse galaxy: UGC2162
- Kinematics and stellar populations of the dwarf elliptical galaxy IC 3653
- A Study of Edge-On Galaxies with the Hubble Space Telescope's Advanced Camera for Surveys. I. Initial Results
- Outlying HII Regions in HI-Selected Galaxies
- Discovery of a stellar tidal stream around the Whale galaxy, NGC 4631
- The portrait of Malin 2: a case study of a giant low surface brightness galaxy
- NGC 4656UV: A UV-selected Tidal Dwarf Galaxy Candidate
- Outer regions of the merging system Arp 270
- Tidal bridge and tidal dwarf candidates in the interacting system Arp194
- Three low surface brightness dwarfs discovered around NGC 4631
Cited by in corpus (8)
- Kinematics and physical properties of the nearby galaxy NGC 4656 and its TDG candidate
- Local Volume Late-Type Galaxies with an Extreme Ratio of -to- Star-Formation Rates
- Star Formation in Nearby Dwarf Galaxies
- Young stellar clumps in the interacting systems: Arp305
- NGC 90: a hidden jelly-fish galaxy?
- Spectral observations of the systems with the disturbed spiral arms: Arp 42, Arp 82 and Arp58
- Morphological study of a sample of dwarf tidal galaxies using the C-A plane
- Arp 58 and Arp 68: two M 51- type systems