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

Full paper

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Number of rows : 31

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Sp type	#ref 1850 - 2023	#notes
1	NAME Magellanic Stream	HVC	00 32	-30.0				~	942	1
2	M 31	G	00 42 44.330	+41 16 07.50	4.86	4.36	3.44	~	12388	1
3	NAME SGP	reg	00 51 26.275	-27 07 41.70				~	561	0
4	NAME SMC	G	00 52 38.0	-72 48 01		2.79	2.2	~	10856	1
5	NAME Segue 2	G	02 19 16.0	+20 10 31			15.2	~	246	0
6	NAME Eri III	G	02 22 45.480	-52 17 04.92				~	56	0
7	NAME Hor I	G	02 55 31.7	-54 07 08				~	129	0
8	NAME Magellanic Clouds	GrG	03 00	-71.0				~	6836	1
9	NAME Reticulum II	G	03 35 42.1	-54 02 57				~	284	0
10	NAME Eridanus II	G	03 44 21.1	-43 32 00				~	155	0
11	NAME Pic I	G	04 43 47.4	-50 16 59				~	47	0
12	NAME LMC	G	05 23 34.6	-69 45 22			0.4	~	16995	1
13	NAME Gal Anticenter	reg	05 46	+28.9				~	878	0
14	NAME Leo T	G	09 34 53.4	+17 03 05			15.1	~	370	0
15	NAME Segue 1	G	10 07 03.2	+16 04 25			15.3	~	445	1
16	NAME Sextans dSph	G	10 13 02.9	-01 36 53		12	10.4	~	829	0
17	Z 126-111	G	11 13 28.13	+22 09 10.1		12.9	12.0	~	824	0
18	GCl 17	GlC	11 29 16.80	+28 58 25.0		14.4		~	348	1
19	ACO 3526	ClG	12 48 51.8	-41 18 21				~	1045	2
20	NAME UMi Galaxy	G	15 09 11.34	+67 12 51.7		13.60	10.6	~	1329	0
21	GCl 38	GlC	16 10 59.00	+14 57 42.0				~	361	0
22	M 92	GlC	17 17 07.39	+43 08 09.4			6.52	~	2074	0
23	NAME Dra dSph	G	17 20 14.335	+57 55 16.39		12.40	10.6	~	1308	1
24	NAME Galactic Center	reg	17 45 39.60213	-29 00 22.0000				~	13911	0
25	NAME SDG	G	18 55 03.1	-30 28 42		4.5	3.6	~	2121	2
26	NAME Indus I	Cl*	21 08 49.970	-51 09 48.60				~	55	0
27	NAME Tuc II	G	22 51 55.1	-58 34 08				~	137	0
28	NAME Grus I	G	22 56 42.4	-50 09 48				~	91	0
29	NAME Pisces II	G	22 58 31.0	+05 57 09			16.3	~	245	0
30	NAME Phe II	G	23 39 59.4	-54 24 22				~	76	0
31	NAME Local Group	GrG	~	~				~	8158	0

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