2016MNRAS.459.2370T

Query : 2016MNRAS.459.2370T

2016MNRAS.459.2370T - Mon. Not. R. Astron. Soc., 459, 2370-2378 (2016/July-1)

The feeble giant. Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater.

TORREALBA G., KOPOSOV S.E., BELOKUROV V. and IRWIN M.

Abstract (from CDS):

We announce the discovery of the Crater 2 dwarf galaxy, identified in imaging data of the VLT Survey Telescope ATLAS survey. Given its half-light radius of ∼ 1100 pc, Crater 2 is the fourth largest satellite of the Milky Way, surpassed only by the Large Magellanic Cloud, Small Magellanic Cloud and the Sgr dwarf. With a total luminosity of MV ≈ -8, this galaxy is also one of the lowest surface brightness dwarfs. Falling under the nominal detection boundary of 30 mag arcsec–2, it compares in nebulosity to the recently discovered Tuc 2 and Tuc IV and UMa II. Crater 2 is located ∼ 120 kpc from the Sun and appears to be aligned in 3D with the enigmatic globular cluster Crater, the pair of ultrafaint dwarfs Leo IV and Leo V and the classical dwarf Leo II. We argue that such arrangement is probably not accidental and, in fact, can be viewed as the evidence for the accretion of the Crater-Leo group.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Galaxy: halo - galaxies: dwarf - galaxies: dwarf

Nomenclature: NAME Crater 2 N=1.

Simbad objects: 30

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Number of rows : 30
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 NAME Tuc IV G 00 02.9 -60 51           ~ 90 0
2 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
3 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
4 NAME Cassiopeia III G 00 35 59.4 +51 33 35           ~ 59 0
5 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
6 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
7 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
8 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
9 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
10 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
12 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
13 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
14 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
15 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
16 NAME UMa Region reg 11 00 +50.0           ~ 333 0
17 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
18 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
19 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
20 NAME Crater Cluster GlC 11 36 16.20 -10 52 38.8           ~ 117 1
21 NAME Crater II Dwarf Galaxy G 11 49 14 -18 24.8           ~ 176 0
22 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
23 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
24 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
25 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
26 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
27 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
28 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
29 NAME Ind II G 20 38.9 -46 10           ~ 31 0
30 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0

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