2020MNRAS.494.5293F

Query : 2020MNRAS.494.5293F

2020MNRAS.494.5293F - Mon. Not. R. Astron. Soc., 494, 5293-5297 (2020/June-1)

Ultradiffuse galaxies in the IC 1459 group from the VEGAS survey.

FORBES D.A., DULLO B.T., GANNON J., COUCH W.J., IODICE E., SPAVONE M., CANTIELLO M. and SCHIPANI P.

Abstract (from CDS):

Using deep g, r, i imaging from the VST Early-type GAlaxy Survey (VEGAS), we have searched for ultradiffuse galaxies (UDGs) in the IC 1459 group. Assuming they are group members, we identify nine galaxies with physical sizes and surface brightnesses that match the UDG criteria within our measurement uncertainties. They have mean colours of g - i = 0.6 and stellar masses of ∼108 M☉. Several galaxies appear to have associated systems of compact objects, e.g. globular clusters. Two UDGs contain a central bright nucleus, with a third UDG revealing a remarkable double nucleus. This appears to be the first reported detection of a double nucleus in a UDG - its origin is currently unclear.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: dwarf - galaxies: formation - galaxies: nuclei

Nomenclature: Tables 1-2: [FDG2020] IC 1459 group UDGN (Nos UDG1-UDG9), [FDG2020] IC 1459 group LSBN (Nos LSB1-LSB3).

Simbad objects: 23

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Number of rows : 23
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 SMDG J0239150-080657 LSB 02 39 15.11 -08 06 58.6     16.5   16.2 ~ 116 0
3 NAME NGC 1052 Group GrG 02 41 09.3 -08 07 10           ~ 90 0
4 LEDA 3097693 LSB 02 41 46.80 -08 24 09.3     16.2   15.8 ~ 183 0
5 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
6 NAME M 96 Group GrG 10 46 45 +11 49.1           ~ 330 0
7 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
8 NGC 5419 rG 14 03 38.7225244848 -33 58 41.881842120   11.77 11.33 10.21 14.44 ~ 208 3
9 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 165 0
10 [FDG2020] IC 1459 group UDG7 LSB 22 55 49.35 -36 38 27.2           ~ 1 0
11 [FDG2020] IC 1459 group UDG5 LSB 22 56 11.95 -37 27 00.0           ~ 1 0
12 [FDG2020] IC 1459 group LSB3 LSB 22 56 14.11 -36 28 38.5           ~ 1 0
13 [FDG2020] IC 1459 group UDG4 LSB 22 56 23.27 -36 03 44.0           ~ 1 0
14 [FDG2020] IC 1459 group UDG8 LSB 22 56 27.61 -36 33 59.5           ~ 1 0
15 [FDG2020] IC 1459 group LSB1 LSB 22 56 42.09 -35 53 55.0           ~ 1 0
16 [FDG2020] IC 1459 group UDG6 LSB 22 57 07.04 -36 37 31.7           ~ 1 0
17 IC 1459 rG 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 652 2
18 NAME IC 1459 Group GrG 22 57 16 -36 25.4           ~ 37 0
19 [FDG2020] IC 1459 group UDG3 LSB 22 57 42.36 -36 05 02.0           ~ 1 0
20 [FDG2020] IC 1459 group UDG2 LSB 22 58 21.25 -36 57 34.9           ~ 1 0
21 [FDG2020] IC 1459 group UDG1 LSB 22 58 23.09 -36 58 59.0           ~ 1 0
22 [FDG2020] IC 1459 group UDG9 LSB 22 58 28.74 -36 36 02.8           ~ 1 0
23 [FDG2020] IC 1459 group LSB2 LSB 22 58 30.15 -36 42 08.3           ~ 1 0

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