2015A&A...579A.134S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET12:35:39

2015A&A...579A.134S - Astronomy and Astrophysics, volume 579A, 134-134 (2015/7-1)

Motion of halo tracer objects in the gravitational potential of a low-mass model of the Galaxy.

SIKORA S., BRATEK L., JALOCHA J. and KUTSCHERA M.

Abstract (from CDS):

Recently, we determined a lower bound for the Milky Way mass in a point mass approximation. We obtain this result for most general spherically symmetric phase-space distribution functions consistent with a measured radial velocity dispersion. As a stability test of these predictions against a perturbation of the point mass potential, in this paper we make use of a representative of these functions to set the initial conditions for a simulation in a more realistic potential of similar mass and to account for other observations. The predicted radial velocity dispersion profile evolves to forms still consistent with the measured profile, proving structural stability of the point mass approximation and the reliability of the resulting mass estimate of ∼2.1x1011M within 150kpc. As a byproduct, we derive a formula in the spherical symmetry relating the radial velocity dispersion profile to a directly measured kinematical observable.

Abstract Copyright:

Journal keyword(s): techniques: radial velocities - Galaxy: halo - Galaxy: kinematics and dynamics - Galaxy: fundamental parameters - methods: numerical

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 171 0
2 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 292 0
3 NAME Leo T dSph G 09 34 53.4 +17 03 05     15.1     ~ 296 0
4 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 332 1
5 NAME Leo I dSph G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1009 1
6 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 251 1
7 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 238 0
8 NAME Leo V G 11 31 09.60 +02 13 12.0     16.0     ~ 149 0
9 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 371 1
10 NAME CVn I dwA GiC 12 38 40.1 +32 45 59 16.91 16.66 16.73 16.62   ~ 187 0
11 SDSS J124721.33+384157.9 HB* 12 47 21.3347650326 +38 41 57.914695731           ~ 2 0
12 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 195 2
13 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 178 0
14 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 313 0
15 NAME Her Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 255 1
16 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11047 0
17 SDSS J234809.02-010737.6 HB* 23 48 09.0318030197 -01 07 37.646021990           ~ 3 0
18 NAME Orphan Stream St* ~ ~           ~ 176 0
19 NAME Local Group GrG ~ ~           ~ 6679 0

    Equat.    Gal    SGal    Ecl

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2019.11.17-12:35:39

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