2019MNRAS.482.3480P

Query : 2019MNRAS.482.3480P

2019MNRAS.482.3480P - Mon. Not. R. Astron. Soc., 482, 3480-3496 (2019/January-3)

Scaling relations for dark matter annihilation and decay profiles in dwarf spheroidal galaxies.

PACE A.B. and STRIGARI L.E.

Abstract (from CDS):

Measuring the dark matter distribution in dwarf spheroidal galaxies (dSphs) from stellar kinematics is crucial for indirect dark matter searches, as these distributions set the fluxes for both dark matter annihilation (J-Factor) and decay (D-Factor). Here, we produce a compilation of J- and D-Factors for dSphs, including new calculations for several newly discovered Milky Way (MW) satellites, for dSphs outside of the MW virial radius, and for M31 satellites. From this compilation, we test for scaling relations between the J- and D-factors and physical properties of the dSphs such as the velocity dispersion (σlos), the distance (d), and the stellar half-light radius (r1/2). We find that the following scaling relation minimizes the residuals as compared to different functional dependences on the observed dSphs properties J(0○.5) = 1017.87 (σlos/5 km s–1)4 (d/100 kpc)–2 (r1/2/100 pc)–1. We find that this relation has considerably smaller scatter as compared to the simpler relations that scale only as 1/d2. We further explore scalings with luminosity (LV), and find that the data do not strongly prefer a scaling including LV as compared to a pure 1/d2 scaling. The scaling relations we derive can be used to estimate the J-Factor without the full dynamical analysis, and will be useful for estimating limits on particle dark matter properties from new systems that do not have high-quality stellar kinematics.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: kinematics and dynamics - Local Group - dark matter - cosmology: theory

Simbad objects: 60

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Number of rows : 60
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 NAME Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 117 0
2 NAME Tuc IV G 00 02.9 -60 51           ~ 69 0
3 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 234 0
4 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 295 0
5 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12650 1
6 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 342 0
7 NAME Andromeda XIV G 00 51 35.0 +29 41 49     15.9     ~ 125 0
8 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1359 4
9 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 207 0
10 NAME Cetus II G 01 17.9 -17 25           ~ 43 0
11 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 533 2
12 NAME Cetus III Dwarf Galaxy G? 02 05 19.40 -04 16 12.0           ~ 24 0
13 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 130 0
14 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 262 0
15 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1743 1
16 NAME Hor I G 02 55 31.7 -54 07 08           ~ 141 0
17 NAME Horologium II G 03 16 32.1 -50 01 05           ~ 62 0
18 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 309 0
19 NAME Eridanus II G 03 44 21.1 -43 32 00           ~ 174 0
20 NAME Reticulum III G 03 45.4 -60 27           ~ 55 0
21 NAME Pic I G 04 43 47.4 -50 16 59           ~ 51 0
22 NAME Col I G 05 31.4 -28 02           ~ 50 0
23 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1125 0
24 NAME Pic II G 06 44 43 -59 53.8           ~ 27 0
25 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 66 0
26 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 374 0
27 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 391 0
28 NAME Leo A G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 615 0
29 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 465 1
30 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1208 1
31 NAME Sextans dSph G 10 13 02.9 -01 36 53   12 10.4     ~ 854 0
32 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 328 1
33 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 320 0
34 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 840 0
35 NAME Leo V G 11 31 09.60 +02 13 12.0     16.0     ~ 203 0
36 NAME Leo IV Dwarf Galaxy G 11 32 57.0 -00 32 00     15.1     ~ 383 1
37 NAME Virgo I Dwarf Galaxy G 12 00 09.6 -00 40 48           ~ 30 0
38 NAME Hydra II G 12 21 42.1 -31 59 07           ~ 97 0
39 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 452 1
40 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 263 2
41 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 326 1
42 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 437 0
43 NAME UMi Galaxy G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1360 0
44 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 107 0
45 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 345 1
46 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1331 1
47 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
48 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 74 0
49 NAME Ind II G 20 38.9 -46 10           ~ 27 0
50 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 445 1
51 NAME Gru II G 22 04.1 -46 26           ~ 85 0
52 NAME Pegasus III G 22 24 22.6 +05 25 12           ~ 55 0
53 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 155 0
54 NAME Grus I G 22 56 42.4 -50 09 48           ~ 102 0
55 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 258 0
56 NAME Andromeda VII GiG 23 26 31.7 +50 40 33   13.6 11.8     ~ 210 1
57 NAME Tuc V G 23 37.4 -63 16           ~ 60 0
58 NAME Phe II G 23 39 59.4 -54 24 22           ~ 86 0
59 NAME Tuc III G 23 56.6 -59 36           ~ 189 0
60 NAME Local Group GrG ~ ~           ~ 8391 0

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