2019ApJ...875..159E


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST00:02:38

2019ApJ...875..159E - Astrophys. J., 875, 159-159 (2019/April-3)

The cumulative mass profile of the Milky Way as determined by globular cluster kinematics from Gaia DR2.

EADIE G. and JURIC M.

Abstract (from CDS):

We present new mass estimates and cumulative mass profiles (CMPs) with Bayesian credible regions for the Milky Way (MW) Galaxy, given the kinematic data of globular clusters (GCs) as provided by (1) the Gaia DR2 collaboration and the HSTPROMO team, and (2) the new catalog in Vasiliev (2019). We use GCs beyond 15 kpc to estimate the CMP of the MW, assuming a total gravitational potential model Φ(r)=Φr^-γ^, which approximates an NFW-type potential at large distances when γ = 0.5. We compare the resulting CMPs given data sets (1) and (2), and find the results to be nearly identical. The median estimate for the total mass is M200 = 0.70 x 1012 M and the 50% Bayesian credible interval is (0.62,0.81)×1012M. However, because the Vasiliev catalog contains more complete data at large r, the MW total mass is slightly more constrained by these data. In this work, we also supply instructions for how to create a CMP for the MW with Bayesian credible regions, given a model for M(<r) and samples drawn from a posterior distribution. With the CMP, we can report median estimates and 50% Bayesian credible regions for the MW mass within any distance (e.g., M(r=25kpc)=0.26(0.20,0.36)×1012M, M(r=50kpc)=0.37(0.29,0.51)×1012M, M(r=100kpc)=0.53(0.41,0.74)×1012M, etc.), making it easy to compare our results directly to other studies.

Abstract Copyright: © 2019. The American Astronomical Society.

Journal keyword(s): Galaxy: halo - Galaxy: fundamental parameters - Galaxy: kinematics and dynamics - Galaxy: structure - globular clusters: general - methods: statistical

Simbad objects: 24

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Number of rows : 24

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 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 973 0
2 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 444 0
3 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1279 0
4 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 737 0
5 NGC 2298 GlC 06 48 59.41 -36 00 19.1   10.77 8.89     ~ 444 0
6 Koposov 2 GlC 07 58 17.00 +26 15 19.4           ~ 60 1
7 NGC 2808 GlC 09 12 03.10 -64 51 48.6   7.77 5.69     ~ 1289 0
8 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 299 1
9 NGC 3201 GlC 10 17 36.82 -46 24 44.9   9.18 8.24     ~ 757 0
10 NAME Crater Cluster GlC 11 36 16.20 -10 52 38.8           ~ 66 1
11 Koposov 1 GlC 11 59 18.40 +12 15 35.8           ~ 59 0
12 NGC 5286 GlC 13 46 26.81 -51 22 27.3   9.18 8.31     ~ 383 0
13 C 1353-269 GlC 13 56 21.702 -27 10 03.00           ~ 109 0
14 [FSR2007] 1716 OpC 16 10 33.0 -53 44 12           ~ 31 0
15 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1202 1
16 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12154 0
17 M 56 GlC 19 16 35.57 +30 11 00.5   8.90       ~ 376 0
18 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 377 0
19 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 314 0
20 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 272 0
21 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 325 0
22 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 928 1
23 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 465 0
24 NAME GD-1 Stream St* ~ ~           ~ 179 0

    Equat.    Gal    SGal    Ecl

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2021.05.06-00:02:38

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