2016MNRAS.461.3702R

Query : 2016MNRAS.461.3702R

2016MNRAS.461.3702R - Mon. Not. R. Astron. Soc., 461, 3702-3713 (2016/October-1)

Extended stellar substructure surrounding the Bootes I dwarf spheroidal galaxy.

RODERICK T.A., MACKEY A.D., JERJEN H. and DA COSTA G.S.

Abstract (from CDS):

We present deep stellar photometry of the Bootes I dwarf spheroidal galaxy in g- and i-band filters, taken with the Dark Energy Camera at Cerro Tololo in Chile. Our analysis reveals a large, extended region of stellar substructure surrounding the dwarf, as well as a distinct overdensity encroaching on its tidal radius. A radial profile of the Bootes I stellar distribution shows a break radius indicating the presence of extra-tidal stars. These observations strongly suggest that Bootes I is experiencing tidal disruption, although not as extreme as that exhibited by the Hercules dwarf spheroidal. Combined with revised velocity dispersion measurements from the literature, we see evidence suggesting the need to review previous theoretical models of the Bootes I dwarf spheroidal galaxy.

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

Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: fundamental parameters - galaxies: individual: Bootes I - galaxies: individual: Bootes I

VizieR on-line data: <Available at CDS (J/MNRAS/461/3702): catalog.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 12

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Number of rows : 12
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 Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
2 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
3 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
4 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
5 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
6 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
7 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
8 2MASS J13583380+1421083 RB? 13 58 33.8132852928 +14 21 08.488847052           ~ 30 0
9 [NGW2008] 980 RB? 13 59 12.6811477896 +13 42 55.710720072           ~ 11 0
10 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
11 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
12 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1

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