2015ApJ...805..130K

Query : 2015ApJ...805..130K

2015ApJ...805..130K - Astrophys. J., 805, 130 (2015/June-1)

Beasts of the southern wild : discovery of nine ultra faint satellites in the vicinity of the Magellanic Clouds.

KOPOSOV S.E., BELOKUROV V., TORREALBA G. and EVANS N.W.

Abstract (from CDS):

We have used the publicly released Dark Energy Survey (DES) data to hunt for new satellites of the Milky Way (MW) in the southern hemisphere. Our search yielded a large number of promising candidates. In this paper, we announce the discovery of nine new unambiguous ultra-faint objects, whose authenticity can be established with the DES data alone. Based on the morphological properties, three of the new satellites are dwarf galaxies, one of which is located at the very outskirts of the MW, at a distance of 380 kpc. The remaining six objects have sizes and luminosities comparable to the Segue 1 satellite and cannot be classified straightforwardly without follow-up spectroscopic observations. The satellites we have discovered cluster around the LMC and the SMC. We show that such spatial distribution is unlikely under the assumption of isotropy, and, therefore, conclude that at least some of the new satellites must have been associated with the Magellanic Clouds in the past.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: kinematics and dynamics - Galaxy: halo - globular clusters: general

Nomenclature: NAME Reticulum II = NAME Ret II. NAME Eridanus R (Nos I-III) = NAME Eri R (Nos II-III). NAME Horologium I = NAME Hor I. NAME Pictoris I = NAME Pic I. NAME Phoenix II = NAME Phe II. NAME Indus I = NAME Ind I. NAME Grus I = NAME Gru I. NAME Tucana II = NAME Tuc II. NAME Eridanus II Cluster = NAME Eri II Cluster.

Simbad objects: 31

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Number of rows : 31
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 Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME SGP reg 00 51 26.275 -27 07 41.70           ~ 606 0
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
5 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
6 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 79 0
7 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
8 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
9 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
10 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 216 0
11 NAME Pic I G 04 43 47.4 -50 16 59           ~ 58 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
13 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
14 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
15 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
16 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
17 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
18 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 379 1
19 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
20 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
21 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 399 0
22 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
23 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
24 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
25 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
26 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 68 0
27 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
28 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
29 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
30 NAME Phe II G 23 39 59.4 -54 24 22           ~ 107 0
31 NAME Local Group GrG ~ ~           ~ 9325 0

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