2016ApJ...830L..10M


Query : 2016ApJ...830L..10M

2016ApJ...830L..10M - Astrophys. J., 830, L10-L10 (2016/October-2)

SMASH 1: a very faint globular cluster disrupting in the outer reaches of the LMC?

MARTIN N.F., JUNGBLUTH V., NIDEVER D.L., BELL E.F., BESLA G., BLUM R.D., CIONI M.-R., CONN B.C., KALEIDA C.C., GALLART C., JIN S., MAJEWSKI S.R., MARTINEZ-DELGADO D., MONACHESI A., MUNOZ R.R., NOEL N.E.D., OLSEN K., STRINGFELLOW G.S., VAN DER MAREL R.P., VIVAS A.K., WALKER A.R. and ZARITSKY D.

Abstract (from CDS):

We present the discovery of a very faint stellar system, SMASH 1, that is potentially a satellite of the Large Magellanic Cloud. Found within the Survey of the Magellanic Stellar History (SMASH), SMASH 1 is a compact (rh=9.1–3.4+5.9 pc) and very low luminosity (MV=-1.0±0.9, LV=10^2.3±0.4^ L) stellar system that is revealed by its sparsely populated main sequence and a handful of red giant branch candidate member stars. The photometric properties of these stars are compatible with a metal-poor ([Fe/\rmH]=-2.2) and old (13 Gyr) isochrone located at a distance modulus of ∼18.8, i.e., a distance of ∼57 kpc. Situated at 11.deg3 from the LMC in projection, its three-dimensional distance from the Cloud is ∼13 kpc, consistent with a connection to the LMC, whose tidal radius is at least 16 kpc. Although the nature of SMASH 1 remains uncertain, its compactness favors it being a stellar cluster and hence dark-matter free. If this is the case, its dynamical tidal radius is only \lesssim 19 pc at this distance from the LMC, and smaller than the system's extent on the sky. Its low luminosity and apparent high ellipticity (ε=0.62–0.21+0.17) with its major axis pointing toward the LMC may well be the tell-tale sign of its imminent tidal demise.

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

Journal keyword(s): globular clusters: individual: SMASH 1 - Local Group - Magellanic Clouds - Magellanic Clouds

Nomenclature: NAME SMASH 1 N=1.

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 855 1
2 DES J0034-4902 GlC 00 33 59.60 -49 02 19.8           ~ 12 1
3 NAME Eri III G 02 22 45.480 -52 17 04.92           ~ 48 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6020 1
5 NAME Magellanic Bridge HI 03 11 -77.5           ~ 369 1
6 NGC 1841 GlC 04 45 23 -83 59.8   12.23 11.43     ~ 175 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15530 1
8 NAME SMASH 1 GlC 06 20 59.90 -80 23 44.7           ~ 9 0
9 Koposov 2 GlC 07 58 17.00 +26 15 19.4           ~ 60 1
10 NAME Crater Cluster GlC 11 36 16.20 -10 52 38.8           ~ 67 1
11 Koposov 1 GlC 11 59 18.40 +12 15 35.8           ~ 59 0
12 C 1353-269 GlC 13 56 21.702 -27 10 03.00           ~ 110 0
13 NAME Laevens 3 GlC 21 06 54.3 +14 58 48           ~ 12 0
14 NAME Indus I Cl* 21 08 49.970 -51 09 48.60           ~ 44 0
15 NAME Local Group GrG ~ ~           ~ 7353 0

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2021.09.18-16:39:02

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