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| Query : 2017MNRAS.469.4370Z |
2017MNRAS.469.4370Z - Mon. Not. R. Astron. Soc., 469, 4370-4377 (2017/August-3)
Interacting galaxy NGC4656 and its unusual dwarf companion.
ZASOV A.V., SABUROVA A.S., EGOROV O.V. and UKLEIN R.I.
Abstract (from CDS):
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 us 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 ultradiffuse 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 on to the discs of both galaxies.
Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: individual: NGC4656 - galaxies: kinematics and dynamics - galaxies: structure - galaxies: structure
Simbad objects: 8
| Number of rows : 8 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Z 539-78 | AG? | 02 42 10.832 | +43 21 18.38 | 14.6 | 13.6 | ~ | 22 | 0 | |||
| 2 | HD 105183 | HS* | 12 06 47.2348389600 | +11 40 12.659833056 | 10.93 | 11.06 | sdB8IIIHe2 | 132 | 0 | |||
| 3 | NGC 4631 | GiC | 12 42 08.009 | +32 32 29.44 | 9.78 | 9.19 | 9.10 | ~ | 1154 | 3 | ||
| 4 | [T2015] nest 102705 | PaG | 12 42 09.8 | +32 32 07 | ~ | 4 | 0 | |||||
| 5 | NGC 4656 | GiP | 12 43 57.6889089768 | +32 10 13.345914504 | 10.96 | 10.52 | ~ | 385 | 3 | |||
| 6 | NGC 4656UV | G | 12 44 14.794 | +32 16 48.26 | ~ | 17 | 1 | |||||
| 7 | HZ 44 | HS* | 13 23 35.2629445608 | +36 07 59.544140304 | 10.186 | 11.42 | 11.65 | 12.00 | 11.995 | sdBN0VIIHe28 | 439 | 0 |
| 8 | NAME Local Group | GrG | ~ | ~ | ~ | 9325 | 0 |
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