2013MNRAS.433.1966O

Query : 2013MNRAS.433.1966O

2013MNRAS.433.1966O - Mon. Not. R. Astron. Soc., 433, 1966-1969 (2013/August-2)

Segue 3: the youngest globular cluster in the outer halo.

ORTOLANI S., BICA E. and BARBUY B.

Abstract (from CDS):

Deep Galileo (Telescopio Nazionale Galileo) B, V and I images of Segue 3, reaching V ∼ 25, reveal that it is the youngest globular cluster known so far in the Galaxy. A young age of 3.2Gyr is found, differently from a previous estimate of 12Gyr. It also appears to be moderately metal rich with [Fe/H] ∼ -0.8, rather than [Fe/H] ∼ -1.7, as previously suggested by Fadely et al. A main difference in the age derivation relative to Fadely et al. comes from the consideration of subgiant branch stars in the isochrone fitting. A deduced distance of d☉ = 29.1kpc is compatible with the outer halo location of other low luminosity globular clusters.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): Hertzsprung-Russell and colour-magnitude diagrams - globular clusters: individual: Segue 3 - Galaxy: halo

VizieR on-line data: <Available at CDS (J/MNRAS/433/1966): seg3viac.dat seg3vibc.dat>

Nomenclature: seg3viac.dat: [OBB2013] NNNN N=1103 among (Nos 1-1248).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 12

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Number of rows : 12
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 NAME Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 149 0
2 NAME Sagittarius Stream St* 02 22 +00.0           ~ 874 0
3 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 243 1
4 Koposov 2 GlC 07 58 17.00 +26 15 19.4           ~ 69 1
5 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 354 1
6 Koposov 1 GlC 11 59 18.40 +12 15 35.8           ~ 69 0
7 C 1353-269 GlC 13 56 21.702 -27 10 03.00           ~ 130 0
8 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 734 1
9 NAME Hercules Aquila Cloud reg 19 04 +06.3           ~ 123 0
10 NAME Segue 3 Cl* 21 21 31.0 +19 07 02           ~ 64 0
11 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 277 1
12 NAME Peg Cluster ClG 23 20 14.7 +08 12 23           ~ 129 0

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