2019MNRAS.487.5799R

Query : 2019MNRAS.487.5799R

2019MNRAS.487.5799R - Mon. Not. R. Astron. Soc., 487, 5799-5812 (2019/August-3)

Abundance matching with the mean star formation rate: there is no missing satellites problem in the Milky Way above M200 ∼ 109 M☉.

READ J.I. and ERKAL D.

Abstract (from CDS):

We introduce a novel abundance matching technique that produces a more accurate estimate of the pre-infall halo mass, M200, for satellite galaxies. To achieve this, we abundance match with the mean star formation rate, averaged over the time when a galaxy was forming stars, <SFR> , instead of the stellar mass, M*. Using data from the Sloan Digital Sky Survey, the GAMA survey and the Bolshoi simulation, we obtain a statistical <SFR> -M200 relation in Λ cold dark matter. We then compare the pre-infall halo mass, M^ abund^200, derived from this relation with the pre-infall dynamical mass, M^ dyn^200, for 21 nearby dSph and dIrr galaxies, finding a good agreement between the two. As a first application, we use our new <SFR> -M200 relation to empirically measure the cumulative mass function of a volume-complete sample of bright Milky Way satellites within 280 kpc of the Galactic centre. Comparing this with a suite of cosmological 'zoom' simulations of Milky Way-mass haloes that account for subhalo depletion by the Milky Way disc, we find no missing satellites problem above M200 ∼ 109 M☉ in the Milky Way. We discuss how this empirical method can be applied to a larger sample of nearby spiral galaxies.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: abundances - galaxies: dwarf - galaxies: haloes - galaxies: kinematics and dynamics - cosmology: observations - dark matter

Simbad objects: 35

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Number of rows : 35
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
5 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
6 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
8 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
9 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
10 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
11 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
12 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
13 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
14 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 355 1
15 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 345 0
16 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
17 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
18 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
19 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
20 NAME CVn I dwA GiC 12 38 40.06 +32 46 00.5 16.91 16.66 16.73 16.62   ~ 242 0
21 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
22 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
23 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
24 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
25 NAME Bootes III G 13 57 07.4 +26 46 30     12.6     ~ 115 1
26 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
27 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
28 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
29 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
30 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
31 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
32 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
33 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
34 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
35 NAME Aquarius Region reg ~ ~           ~ 37 0

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