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| Query : 2014ApJ...780...88N |
2014ApJ...780...88N - Astrophys. J., 780, 88 (2014/January-1)
Nebular metallicities in two isolated local void dwarf galaxies.
NICHOLLS D.C., JERJEN H., DOPITA M.A. and BASURAH H.
Abstract (from CDS):
Isolated dwarf galaxies, especially those situated in voids, may provide insight into primordial conditions in the universe and the physical processes that govern star formation in undisturbed stellar systems. The metallicity of H II regions in such galaxies is key to investigating this possibility. From the SIGRID sample of isolated dwarf galaxies, we have identified two exceptionally isolated objects, the Local Void galaxy [KK98]246 (ESO 461-G036) and another somewhat larger dwarf irregular on the edge of the Local Void, MCG-01-41-006 (HIPASS J1609-04). We report our measurements of the nebular metallicities in these objects. The first object has a single low luminosity H II region, while the second is in a more vigorous star forming phase with several bright H II regions. We find that the metallicities in both galaxies are typical for galaxies of this size, and do not indicate the presence of any primordial gas, despite (for [KK98]246) the known surrounding large reservoir of neutral hydrogen.
Abstract Copyright: ∼
Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: individual ([KK98]246 (ESO 461-G036), MCG-01-41-006 (HIPASS J1609-04)) - galaxies: irregular - H II regions - ISM: abundances
Simbad objects: 14
| Number of rows : 14 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | [PBT2001] SBSG 0335-052 W | G | 03 37 38.40 | -05 02 37.5 | 19.14 | 18.85 | ~ | 107 | 1 | |||
| 2 | NGC 2915 | AG? | 09 26 11.532 | -76 37 34.75 | 13.13 | 12.93 | 12.68 | 11.90 | 12.8 | ~ | 354 | 2 |
| 3 | NAME Great Attractor | SCG | 10 32 | -46.0 | ~ | 558 | 0 | |||||
| 4 | ESO 215-9 | AG? | 10 57 29.90 | -48 10 43.0 | 16.03 | 15.02 | 15.0 | ~ | 78 | 0 | ||
| 5 | LEDA 87172 | LSB | 11 12 15.7 | +16 45 15 | ~ | 12 | 0 | |||||
| 6 | NGC 3741 | AG? | 11 36 05.754 | +45 17 02.96 | 15.01 | 14.55 | 14.23 | 14.06 | ~ | 220 | 0 | |
| 7 | NAME Virgo Cluster | ClG | 12 26 32.1 | +12 43 24 | ~ | 6643 | 0 | |||||
| 8 | NAME SHAPLEY-CENTAURUS CL | SCG | 13 06.0 | -33 04 | ~ | 607 | 0 | |||||
| 9 | MCG-01-41-006 | AG? | 16 09 36.84 | -04 37 12.6 | 15.4 | 15.4 | 15.3 | ~ | 20 | 0 | ||
| 10 | LEDA 2801026 | LSB | 16 13 47.504 | +54 22 08.25 | 15.9 | ~ | 108 | 0 | ||||
| 11 | NAME Local Void | vid | 18 38 | +18.0 | ~ | 198 | 0 | |||||
| 12 | NAME Sgr dIG | G | 19 29 59.0 | -17 40 41 | 15.5 | 13.6 | ~ | 307 | 1 | |||
| 13 | ESO 461-36 | G | 20 03 57.4 | -31 40 53 | 17.06 | 16.2 | 16.1 | ~ | 71 | 1 | ||
| 14 | NAME Local Group | GrG | ~ | ~ | ~ | 8389 | 0 |
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