2026ApJ...997..271M

Query : 2026ApJ...997..271M

2026ApJ...997..271M - Astrophys. J., 997, 271 (2026/February-1)

Hubble Space Telescope Imaging of Three Isolated Faint Dwarf Galaxies beyond the Local Group: Pavo, Corvus A, and Kamino.

MUTLU-PAKDIL B., JONES M.G., SAND D.J., CRNOJEVIC D., HERRON K., STRADER J., ZARITSKY D., BENNET P., DRLICA-WAGNER A., CASEY Q.O., DOLIVA-DOLINSKY A., DONNERSTEIN R., FIELDER C.E., HUNTER L.C., PETER A.H.G., PRABHU D.S. and SPEKKENS K.

Abstract (from CDS):

We present new Hubble Space Telescope (HST) imaging of three recently discovered star-forming dwarf galaxies beyond the Local Group: Pavo, Corvus A, and Kamino. The discovery of Kamino is reported here for the first time. They rank among the most isolated faint dwarf galaxies known; hence they provide unique opportunities to study galaxy evolution at the smallest scales, free from the environmental effects of more massive galaxies. Our HST data reach ∼2-4 magnitudes below the tip of the red giant branch (TRGB) for each dwarf, allowing us to measure their distances, structural properties, and recent star formation histories (SFHs). All three galaxies contain a complex stellar population of young and old stars, and are typical of field galaxies in this mass regime (MV = -10.62 ± 0.08 and $D=2.1{6}_{-0.07}^{+0.08}$ Mpc for Pavo, MV = -10.91 ± 0.10 and D = 3.34 ± 0.11 Mpc for Corvus A, and MV = -12.02 ± 0.12 and $D=6.5{0}_{-0.11}^{+0.15}$ Mpc for Kamino). Our HST-derived SFHs reveal differences among the three dwarfs: Pavo and Kamino show relatively steady, continuous star formation, while Corvus A formed ∼60% of its stellar mass by 10 Gyr ago. These results align with theoretical predictions of diverse evolutionary pathways for isolated low-mass galaxies.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Dwarf galaxies - Galaxy environments - HST photometry - Star formation - Low surface brightness galaxies - Galaxy stellar content - Galaxy distances - Galaxy evolution

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR. // All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 21

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Number of rows : 21
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
3 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
4 NAME Sculptor A Dwarf Galaxy LSB 01 08 30.80 -36 03 52.9           ~ 2 0
5 NAME Kamino Dwarf Galaxy G 04 15 49.21 -60 43 51.8           ~ 2 0
6 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 692 1
7 LEDA 5072715 G 05 45 44.79 +10 46 15.6           ~ 11 0
8 EZOA J0630+08 G 06 30 09.2 +08 21 16           ~ 13 0
9 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
10 NAME Antlia B G 09 48 56.08 -25 59 24.0           ~ 41 0
11 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
12 NAME Leo P BiC 10 21 45.123 +18 05 16.89           ~ 268 0
13 NAME Corvus A Galaxy G 12 14 45.6 -16 23 49           ~ 8 0
14 2dFGRS TGN132Z178 GiC 13 00 00.6 -04 21 37   16.82   15.90   ~ 9 0
15 NAME Hedgehog Galaxy LSB 13 22 46.880 -20 53 55.94           ~ 4 0
16 IC 4662 bCG 17 47 09.192 -64 38 19.25   11.75 11.1 10.45   ~ 253 4
17 NAME Pavo Dwarf Galaxy G 19 54 59.98 -61 04 20.5           ~ 9 0
18 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
19 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
20 NAME Tucana B LSB 22 47 00.50 -58 24 27.0           ~ 22 0
21 NAME Local Group GrG ~ ~           ~ 9325 0

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