2020A&A...640A..70M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET14:49:40

2020A&A...640A..70M - Astronomy and Astrophysics, volume 640A, 70-70 (2020/8-1)

Massive disc galaxies too dominated by dark matter in cosmological hydrodynamical simulations.

MARASCO A., POSTI L., OMAN K., FAMAEY B., CRESCI G. and FRATERNALI F.

Abstract (from CDS):

We investigated the disc-halo connection in massive (M*>5x1010M) disc galaxies from the cosmological hydrodynamical simulations EAGLE and IllustrisTNG, and compared this connection with that inferred from the study of HI rotation curves in nearby massive spirals from the Spitzer Photometry and Accurate Rotation Curves dataset. We find that discrepancies between the simulated and observed discs arise both on global and local scales. Globally, the simulated discs inhabit halos that are a factor ∼4 (in EAGLE) and ∼2 (in IllustrisTNG) more massive than those derived from the rotation curve analysis of the observed dataset. We also used synthetic rotation curves of the simulated discs to demonstrate that the recovery of the halo masses from rotation curves are not systematically biased. We find that the simulations predict systems dominated by dark matter with stellar-to-total enclosed mass ratios that are a factor of 1.5-2 smaller than real galaxies at all radii. This is an alternative manifestation of the 'failed feedback problem,' since it indicates that simulated halos hosting massive discs have been too inefficient at converting their baryons into stars, possibly owing to an overly efficient stellar and/or AGN feedback implementation.

Abstract Copyright: © ESO 2020

Journal keyword(s): galaxies: kinematics and dynamics - galaxies: halos - galaxies: spiral - methods: numerical

VizieR on-line data: <Available at CDS (J/A+A/640/A70): tablea1e.dat tablea1t.dat tablea2.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 22

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Number of rows : 22

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 NGC 801 AGN 02 03 44.7940775128 +38 15 31.624590609   14.23 13.47     ~ 164 0
2 NGC 1167 LIN 03 01 42.358 +35 12 20.34   13.84 12.77     ~ 303 2
3 UGC 2885 G 03 53 02.4582817635 +35 35 22.169573263   14.4       ~ 133 0
4 IC 356 IG 04 07 46.908 +69 48 44.75   13.3       ~ 131 1
5 UGC 3205 G 04 56 14.815 +30 03 07.88   16.0       ~ 50 0
6 ESO 563-21 EmG 08 47 16.981 -20 02 08.38   13.5   12.47 12.7 ~ 70 0
7 NGC 2841 LIN 09 22 02.655 +50 58 35.32 10.43 10.09 9.22     ~ 997 1
8 NGC 2955 GiG 09 41 16.6180880582 +35 52 56.167749421   13.90       ~ 88 0
9 NGC 2998 LIN 09 48 43.633 +44 04 53.15   13.3       ~ 190 0
10 NGC 2985 Sy1 09 50 22.233 +72 16 43.13   11.37 10.61     ~ 226 1
11 M 109 GiG 11 57 35.984 +53 22 28.27   10.94   9.57   ~ 421 0
12 NGC 5390 LIN 13 55 40.023 +40 27 42.37   12.81 11.93 10.04   ~ 322 1
13 NGC 5533 G 14 16 07.7447534360 +35 20 37.779634124   13.0       ~ 150 1
14 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 689 1
15 NGC 5985 SyG 15 39 37.0620220294 +59 19 55.246166585   15.24 14.22     ~ 221 0
16 NGC 6195 LIN 16 36 32.5655877037 +39 01 40.409449250   14.7       ~ 79 0
17 NGC 6674 G 18 38 33.889 +25 22 30.39   13.7       ~ 97 0
18 UGC 11455 GiP 19 29 56.257 +72 06 46.14   15.3       ~ 49 0
19 NGC 7217 LIN 22 07 52.368 +31 21 33.32   12.94 11.92     ~ 467 0
20 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1121 2
21 UGC 12506 G 23 19 30.476 +16 04 29.25   15.6       ~ 55 0
22 NAME Local Group GrG ~ ~           ~ 7074 0

    Equat.    Gal    SGal    Ecl

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2020.10.26-14:49:40

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