2010ApJ...722..248M

Query : 2010ApJ...722..248M

2010ApJ...722..248M - Astrophys. J., 722, 248-261 (2010/October-2)

Local group dwarf spheroidals: correlated deviations from the baryonic Tully-Fisher relation.

McGAUGH S.S. and WOLF J.

Abstract (from CDS):

Local Group dwarf spheroidal satellite galaxies are the faintest extragalactic stellar systems known. We examine recent data for these objects in the plane of the Baryonic Tully-Fisher Relation (BTFR). While some dwarf spheroidals adhere to the BTFR, others deviate substantially. We examine the residuals from the BTFR and find that they are not random. The residuals correlate with luminosity, size, metallicity, ellipticity, and susceptibility of the dwarfs to tidal disruption in the sense that fainter, more elliptical, and tidally more susceptible dwarfs deviate farther from the BTFR. These correlations disfavor stochastic processes and suggest a role for tidal effects. We identify a test to distinguish between ΛCDM and MOND based on the orbits of the dwarf satellites of the Milky Way and how stars are lost from them.

Abstract Copyright: ∼

Journal keyword(s): dark matter - galaxies: dwarf - galaxies: formation - galaxies: halos - Local Group

Simbad objects: 29

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Number of rows : 29
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 ESO 349-31 AG? 00 08 13.1536 -34 34 47.836   15.54   14.99   ~ 156 3
2 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
3 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
4 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
5 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
6 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 132 0
7 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 125 1
8 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
9 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
11 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
12 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
13 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
14 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
15 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
16 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
17 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
18 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
19 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
20 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
21 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
22 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
23 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
24 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
25 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
26 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
27 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
28 NAME Andromeda VII GiG 23 26 31.0 +50 40 33   13.6 11.8     ~ 222 1
29 NAME Local Group GrG ~ ~           ~ 9325 0

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