2015ApJ...806...54E

Query : 2015ApJ...806...54E

2015ApJ...806...54E - Astrophys. J., 806, 54 (2015/June-2)

Estimating the galactic mass profile in the presence of incomplete data.

EADIE G.M., HARRIS W.E. and WIDROW L.M.

Abstract (from CDS):

A powerful method to measure the mass profile of a galaxy is through the velocities of tracer particles distributed through its halo. Transforming this kind of data accurately to a mass profile, however, is not a trivial problem. In particular, limited or incomplete data may substantially affect the analysis. In this paper we develop a Bayesian method to deal with incomplete data effectively; we have a hybrid-Gibbs sampler that treats the unknown velocity components of tracers as parameters in the model. We explore the effectiveness of our model using simulated data and then apply our method to the Milky Way (MW) using velocity and position data from globular clusters and dwarf galaxies. We find that, in general, missing velocity components have little effect on the total mass estimate. However, the results are quite sensitive to the outer cluster Pal 3. Using a basic Hernquist model with an isotropic velocity dispersion, we obtain credible regions for the cumulative mass profile of the MW and provide estimates for the model parameters with 95% Bayesian credible intervals. The mass contained within 260/kpc is, with a 95% credible interval of. The Hernquist parameters for the total mass and scale radius are and/kpc, where the uncertainties span the 95% credible intervals. The code we developed for this work, Galactic Mass Estimator (GME), will be available as an open source package in the R Project for Statistical Computing.

Abstract Copyright: ∼

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

Simbad objects: 98

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Number of rows : 98
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 3916 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11146 1
3 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1041 0
4 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1359 4
5 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1085 0
6 NAME Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 149 0
7 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 262 0
8 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1743 1
9 NAME Eridanus ClG GrG 03 38 32.00 -22 18 51.0           ~ 176 0
10 NAME E 1 GlC 03 55 02.5 -49 36 52           ~ 208 0
11 Cl Pal 2 GlC 04 46 05.91 +31 22 53.4   15       ~ 180 0
12 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1429 0
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17431 0
14 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 817 0
15 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1125 0
16 NGC 2298 GlC 06 48 59.41 -36 00 19.1     8.89     ~ 497 0
17 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 932 0
18 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 374 0
19 NAME PYX GLOBULAR CL GlC 09 07 57.80 -37 13 17.0           ~ 107 0
20 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 328 1
21 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 465 1
22 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1208 1
23 NAME Sextans dSph G 10 13 02.9 -01 36 53   12 10.4     ~ 854 0
24 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 328 1
25 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 320 0
26 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 840 0
27 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 354 1
28 NAME Leo V G 11 31 09.60 +02 13 12.0     16.0     ~ 203 0
29 NAME Leo IV Dwarf Galaxy G 11 32 57.0 -00 32 00     15.1     ~ 383 1
30 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 573 0
31 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 452 1
32 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 997 0
33 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 263 2
34 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 836 0
35 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3426 0
36 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 326 1
37 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2478 0
38 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 241 0
39 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 437 0
40 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 828 0
41 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 300 0
42 NGC 5694 GlC 14 39 36.52 -26 32 18.0           ~ 301 0
43 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 408 0
44 NAME UMi Galaxy G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1359 0
45 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 734 1
46 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 389 0
47 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 1977 0
48 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 368 0
49 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 715 0
50 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1848 0
51 NGC 6144 GlC 16 27 13.86 -26 01 24.6           ~ 243 0
52 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 345 1
53 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 786 0
54 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2192 0
55 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 366 0
56 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 676 0
57 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 789 0
58 GCl 50 GlC 16 59 51.1 -00 32 00   15.70       ~ 200 1
59 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 278 0
60 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2115 0
61 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1331 1
62 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 350 1
63 IC 1257 Bz? 17 27 06.00 -07 05 00.0           ~ 87 0
64 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 585 0
65 ESO 455-23 GlC 17 35 47.80 -30 28 11.0           ~ 254 0
66 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 172 0
67 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1975 0
68 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 178 0
69 NGC 6426 GlC 17 44 54.71 +03 10 12.5           ~ 222 0
70 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14412 0
71 NAME cl Djorgovski 1 GlC 17 47 28.30 -33 03 56.0           ~ 77 0
72 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 884 0
73 ESO 455-49 GlC 17 50 46.40 -31 16 31.0           ~ 185 0
74 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 166 0
75 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 120 0
76 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 296 0
77 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 238 0
78 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 288 0
79 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 769 0
80 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1378 0
81 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 519 0
82 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 1068 0
83 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2187 2
84 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2000 0
85 M 56 GlC 19 16 35.57 +30 11 00.5           ~ 422 0
86 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 428 0
87 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 354 0
88 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 853 0
89 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 321 0
90 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1127 0
91 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 366 0
92 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 422 0
93 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 532 0
94 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3139 0
95 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1030 1
96 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1048 0
97 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 277 1
98 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 301 0

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