2015MNRAS.450.1409S

Query : 2015MNRAS.450.1409S

2015MNRAS.450.1409S - Mon. Not. R. Astron. Soc., 450, 1409-1419 (2015/June-3)

The intrinsic ellipticity of dwarf spheroidal galaxies: constraints from the Andromeda system.

SALOMON J.-B., IBATA R.A., MARTIN N.F. and FAMAEY B.

Abstract (from CDS):

We present a study of the intrinsic deprojected ellipticity distribution of the satellite dwarf galaxies of the Andromeda galaxy, assuming that their visible components have a prolate shape, which is a natural outcome of simulations. Different possibilities for the orientation of the major axis of the prolate dwarf galaxies are tested, pointing either as close as possible to the radial direction towards the centre of Andromeda, or tangential to the radial direction, or with a random angle in the plane that contains the major axis and the observer. We find that the mean intrinsic axis ratio is ∼ 1/2, with small differences depending on the assumed orientation of the population. Our deprojections also suggest that a significant fraction of the satellites, ∼ 10 percent, are tidally disrupted remnants. We find that there is no evidence of any obvious difference in the morphology and major axis orientation between satellites that belong to the vast thin plane of corotating galaxies around Andromeda and those that do not belong to this structure.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

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

Simbad objects: 28

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Number of rows : 28
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 Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 129 0
2 NAME Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 77 0
3 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 168 0
4 NAME Andromeda XXVI G 00 23 45.6 +47 54 58     17.3     ~ 76 0
5 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 120 0
6 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
7 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
8 NAME Andromeda XXX G 00 36 34.90 +49 38 48.0           ~ 59 0
9 NAME Andromeda XVII G 00 37 07.0 +44 19 20     15.8     ~ 101 0
10 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
11 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
12 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
13 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 130 0
14 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 124 0
15 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
16 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 128 0
17 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 176 1
18 NAME Pisces V G 00 59 29.8 +32 22 36     14.4     ~ 149 0
19 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
20 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
21 NAME Andromeda XV G 01 14 18.7 +38 07 03     14.6     ~ 123 0
22 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
23 NAME Andromeda XXIV G 01 18 30.0 +46 21 58     16.3     ~ 64 0
24 NAME Andromeda XXII G 01 27 40.0 +28 05 25     18.0     ~ 95 0
25 NAME Andromeda XXIII G 01 29 21.8 +38 43 08     14.2     ~ 88 0
26 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
27 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 117 0
28 NAME Local Group GrG ~ ~           ~ 9325 0

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