2016ApJ...833L...5D

Query : 2016ApJ...833L...5D

2016ApJ...833L...5D - Astrophys. J., 833, L5-L5 (2016/December-2)

An ultra-faint galaxy candidate discovered in early data from the Magellanic Satellites Survey.

DRLICA-WAGNER A., BECHTOL K., ALLAM S., TUCKER D.L., GRUENDL R.A., JOHNSON M.D., WALKER A.R., JAMES D.J., NIDEVER D.L., OLSEN K.A.G., WECHSLER R.H., CIONI M.R.L., CONN B.C., KUEHN K., LI T.S., MAO Y.-Y., MARTIN N.F., NEILSEN E., NOEL N.E.D., PIERES A., SIMON J.D., STRINGFELLOW G.S., VAN DER MAREL R.P. and YANNY B.

Abstract (from CDS):

We report a new ultra-faint stellar system found in Dark Energy Camera data from the first observing run of the Magellanic Satellites Survey (MagLiteS). MagLiteS J0644-5953 (Pictor II or Pic II) is a low surface brightness (µ=28.5–1+1 mag  arcsec–2 within its half-light radius) resolved overdensity of old and metal-poor stars located at a heliocentric distance of 45–4+5 kpc. The physical size (r1/2=46–11+15 pc ) and low luminosity (MV=-3.2–0.5+0.4 mag ) of this satellite are consistent with the locus of spectroscopically confirmed ultra-faint galaxies. MagLiteS J0644-5953 (Pic II) is located 11.3–0.9+3.1 kpc  from the Large Magellanic Cloud (LMC), and comparisons with simulation results in the literature suggest that this satellite was likely accreted with the LMC. The close proximity of MagLiteS J0644-5953 (Pic II) to the LMC also makes it the most likely ultra-faint galaxy candidate to still be gravitationally bound to the LMC.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: dwarf - Local Group - Magellanic Clouds - Magellanic Clouds

Nomenclature: NAME MagLiteS J0644-5953 = NAME Pictor II = NAME Pic II.

Simbad objects: 16

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Number of rows : 16
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
5 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
6 NAME Ret GlC 04 36 10.15 -58 51 34.8   14.00 14.25 13.50   ~ 177 1
7 NGC 1841 GlC 04 45 24.38 -83 59 53.3   12.23 11.43     ~ 190 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
9 ESO 121-3 Cl* 06 02 03.32 -60 31 25.6   14.91 14.04     ~ 118 0
10 NAME Pic II G 06 44 43 -59 53.8           ~ 33 0
11 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
12 MADCASH-1 G 07 42 39.400 +65 25 00.01         23.55 ~ 16 0
13 NAME Antlia B G 09 48 56.08 -25 59 24.0           ~ 41 0
14 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
15 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 118 0
16 NAME Local Group GrG ~ ~           ~ 9325 0

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