2016MNRAS.458L..59M

Query : 2016MNRAS.458L..59M

2016MNRAS.458L..59M - Mon. Not. R. Astron. Soc., 458, L59-L63 (2016/May-1)

Is Draco II one of the faintest dwarf galaxies? First study from Keck/DEIMOS spectroscopy.

MARTIN N.F., GEHA M., IBATA R.A., COLLINS M.L.M., LAEVENS B.P.M., BELL E.F., RIX H.-W., FERGUSON A.M.N., CHAMBERS K.C., WAINSCOAT R.J. and WATERS C.

Abstract (from CDS):

We present the first spectroscopic analysis of the faint and compact stellar system Draco II (Dra II, MV=-2.9±0.8, ), recently discovered in the Panoramic Survey Telescope and Rapid Response System 1 3π survey. The observations, conducted with DEIMOS on the Keck II telescope, establish some of its basic characteristics: the velocity data reveal a narrow peak with nine member stars at a systemic heliocentric velocity , thereby confirming Dra II is a satellite of the Milky Way; we infer a velocity dispersion with σvr=2.9±2.1 km/s ( and , in Solar units; furthermore, very weak calcium triplet lines in the spectra of the high signal-to-noise member stars imply [Fe/H]

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

Journal keyword(s): galaxies: individual: Draco II - galaxies: kinematics and dynamics - Local Group

VizieR on-line data: <Available at CDS (J/MNRAS/458/L59): table1.dat>

Nomenclature: Table 1: [MGI2016] NN (Nos 1-34).

Simbad objects: 40

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Number of rows : 40
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 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
2 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
3 [MGI2016] 15 * 15 52 17.0199651024 +64 33 26.950565772           ~ 1 0
4 [LMS2018] J238.07675000+64.59608333 * 15 52 18.4164338712 +64 35 45.886637724           ~ 2 0
5 [LMS2018] J238.11125000+64.57577778 * 15 52 26.7023014464 +64 34 32.718223596           ~ 2 0
6 [LMS2018] J238.11487862+64.60882637 * 15 52 27.5634467664 +64 36 32.054726052           ~ 2 0
7 [LMS2018] J238.12209840+64.60199650 * 15 52 29.3074009368 +64 36 07.027261560           ~ 2 0
8 [LMS2018] J238.13162500+64.56455556 * 15 52 31.5972857400 +64 33 52.228774728           ~ 2 0
9 [LMS2018] J238.15138333+64.60540000 Pe* 15 52 36.3348662880 +64 36 19.301554224           ~ 3 0
10 [LMS2018] J238.17570833+64.57013889 Pe* 15 52 42.1663820160 +64 34 12.409681404           ~ 3 0
11 [LMS2018] J238.18480597+64.61537726 * 15 52 44.3663401176 +64 36 55.430283708           ~ 2 0
12 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
13 [LMS2018] J238.20966667+64.61985278 Pe* 15 52 50.3309246928 +64 37 11.262268632           ~ 2 0
14 [LMS2018] J238.21103333+64.57847778 * 15 52 50.6483423016 +64 34 42.573624348           ~ 2 0
15 [LMS2018] J238.21533400+64.60644630 * 15 52 51.7125559560 +64 36 23.287565268           ~ 2 0
16 [LMS2018] J238.21795833+64.59575000 Pe* 15 52 52.3067852328 +64 35 44.592187560           ~ 2 0
17 [LMS2018] J238.22337500+64.55341667 Pe* 15 52 53.6111283072 +64 33 12.191943132           ~ 2 0
18 [LMS2018] J238.22609167+64.59788333 * 15 52 54.2592688272 +64 35 52.268243964           ~ 2 0
19 [LMS2018] J238.22750000+64.57172222 Pe* 15 52 54.5970461208 +64 34 18.033482568           ~ 3 0
20 [LMS2018] J238.23100000+64.59677778 * 15 52 55.4353382160 +64 35 48.373618308           ~ 2 0
21 [MGI2016] 30 * 15 53 00.1611 +64 32 52.787           ~ 1 0
22 [LMS2018] J238.25460417+64.54189167 Pe* 15 53 01.1153328216 +64 32 30.677431704           ~ 2 0
23 [LMS2018] J238.28841250+64.58997500 * 15 53 09.2316106872 +64 35 23.698188924           ~ 2 0
24 [LMS2018] J238.29208333+64.56011111 Pe* 15 53 10.0949453400 +64 33 36.291523608           ~ 3 0
25 [LMS2018] J238.29766667+64.58597222 Pe* 15 53 11.4339114048 +64 35 09.392064468           ~ 2 0
26 [LMS2018] J238.34537500+64.57397222 * 15 53 22.8922612800 +64 34 26.252240016           ~ 2 0
27 [MGI2016] 26 * 15 53 33.3312517848 +64 34 42.647337804           ~ 1 0
28 [LMS2018] J238.41302083+64.57990000 Pe* 15 53 39.12500 +64 34 47.6400           ~ 2 0
29 [MGI2016] 24 * 15 53 43.8372583728 +64 32 21.538711644           ~ 1 0
30 [LMS2018] J238.43973971+64.56761491 * 15 53 45.5228971368 +64 34 03.503111124           ~ 2 0
31 [LMS2018] J238.49718375+64.51780965 PM* 15 53 59.4586441032 +64 31 04.662617196           ~ 2 0
32 [MGI2016] 21 * 15 54 02.3583664032 +64 30 41.711979312           ~ 1 0
33 [LMS2018] J238.51061250+64.55532500 * 15 54 02.4928071288 +64 33 19.208154564           ~ 2 0
34 [LMS2018] J238.51431587+64.57347835 * 15 54 03.4487285856 +64 34 24.521209752           ~ 2 0
35 [LMS2018] J238.54619167+64.52975556 Pe* 15 54 11.0500852200 +64 31 47.253419400           ~ 2 0
36 [LMS2018] J238.55823750+64.56613611 * 15 54 13.9342244280 +64 33 58.197499308           ~ 2 0
37 [LMS2018] J238.56645417+64.50524722 * 15 54 15.9043431840 +64 30 18.991767096           ~ 2 0
38 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
39 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
40 NAME Local Group GrG ~ ~           ~ 9325 0

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