2023MNRAS.522..130R

Query : 2023MNRAS.522..130R

2023MNRAS.522..130R - Mon. Not. R. Astron. Soc., 522, 130-150 (2023/June-2)

The SAMI-Fornax Dwarfs Survey - III. Evolution of [α/Fe] in dwarfs, from Galaxy Clusters to the Local Group.

ROMERO-GOMEZ J., PELETIER R.F., AGUERRI J.A.L., MIESKE S., SCOTT N., BLAND-HAWTHORN J., BRYANT J.J., CROOM S.M., EFTEKHARI F.S., FALCON-BARROSO J., HILKER M., VAN DE VEN G. and VENHOLA A.

Abstract (from CDS):

Using very deep, high spectral resolution data from the SAMI Integral Field Spectrograph, we study the stellar population properties of a sample of dwarf galaxies in the Fornax Cluster, down to a stellar mass of 107 M⊙, which has never been done outside the Local Group. We use full spectral fitting to obtain stellar population parameters. Adding massive galaxies from the ATLAS3D project, which we re-analysed, and the satellite galaxies of the Milky Way, we obtained a galaxy sample that covers the stellar mass range 104-1012 M⊙. Using this large range, we find that the mass-metallicity relation is not linear. We also find that the [α/Fe]-stellar mass relation of the full sample shows a U-shape, with a minimum in [α/Fe] for masses between 109 and 1010 M⊙. The relation between [α/Fe] and stellar mass can be understood in the following way: when the faintest galaxies enter the cluster environment, a rapid burst of star formation is induced, after which the gas content is blown away by various quenching mechanisms. This fast star formation causes high [α/Fe] values, like in the Galactic halo. More massive galaxies will manage to keep their gas longer and form several bursts of star formation, with lower [α/Fe] as a result. For massive galaxies, stellar populations are regulated by internal processes, leading to [α/Fe] increasing with mass. We confirm this model by showing that [α/Fe] correlates with clustercentric distance in three nearby clusters and also in the halo of the Milky Way.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): galaxies: abundances - galaxies: clusters: general - galaxies: dwarf - galaxies: fundamental parameters

Simbad objects: 73

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Number of rows : 73
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 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
2 NAME Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
3 NAME Segue 2 G 02 19 16.0 +20 10 31     15.2     ~ 299 0
4 NAME Hor I G 02 55 31.7 -54 07 08           ~ 169 0
5 NAME For A Cluster ClG 03 22 -37.2           ~ 12 0
6 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
7 NGC 1316C EmG 03 24 58.4399334528 -37 00 34.541960832   14.36   13.23   ~ 67 0
8 NGC 1326A AG? 03 25 08.50 -36 21 50.2   13.80   12.91 13.7 ~ 103 0
9 2MASX J03262503-3707417 GiC 03 26 25.0085720520 -37 07 41.543028444   16.09       ~ 43 0
10 LEDA 634438 G 03 27 06.2 -36 38 12           ~ 9 0
11 6dFGS gJ033147.6-350305 GiC 03 31 47.6331242640 -35 03 05.148733932   15.27       ~ 60 0
12 2MASX J03324763-3414194 LSB 03 32 47.6755769592 -34 14 19.382566452   15.25       ~ 54 0
13 ESO 358-15 Sy2 03 33 06.85 -34 48 29.2   15.34   14.29 14.9 ~ 86 0
14 LEDA 660587 GiC 03 33 56.28 -34 33 41.8   17.3       ~ 17 0
15 LEDA 74738 GiC 03 34 21.80 -34 35 33.4   17.6       ~ 23 0
16 MCG-06-08-027 EmG 03 34 29.4927803424 -35 32 47.329271916   14.50       ~ 95 1
17 ESO 358-19 GiC 03 34 30.8740483488 -34 17 51.501897456   15.71       ~ 44 0
18 NGC 1373 GiP 03 34 59.1993515280 -35 10 15.879086760 14.44 14.03 13.26     ~ 136 1
19 NAME Reticulum II G 03 35 42.1 -54 02 57           ~ 375 0
20 6dFGS gJ033612.9-360959 GiC 03 36 12.94 -36 09 59.0   16.4       ~ 25 0
21 LEDA 74778 GiC 03 36 48.6 -34 16 48   17.2       ~ 21 0
22 LEDA 74781 GiC 03 36 53.21 -34 56 17.3   16.93       ~ 30 0
23 MCG-06-09-008 GiP 03 36 54.3158470008 -35 22 28.948080864   14.81       ~ 105 2
24 6dFGS gJ033704.6-353524 GiC 03 37 04.66 -35 35 24.0   15.94   15.65   ~ 51 0
25 LEDA 74791 GiC 03 37 23.41 -34 54 00.1   16.51       ~ 32 0
26 NGC 1396 GiG 03 38 06.5677454520 -35 26 23.637846372   14.80       ~ 105 1
27 ESO 358-42 GiC 03 38 09.1644279912 -34 31 07.380761484   15.74   14.44   ~ 67 1
28 LEDA 74808 EmG 03 38 19.265 -35 07 44.74   15.60 15.34     ~ 65 0
29 LEDA 74811 EmG 03 38 21.4890668040 -35 15 34.953195492   15.89 15.65     ~ 42 0
30 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
31 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
32 LEDA 13449 GiC 03 39 13.42 -35 22 15.7   15.1 14.91     ~ 68 1
33 LEDA 13452 GiC 03 39 19.60 -35 43 29.0   16.10 15.89     ~ 49 1
34 NGC 1427A GiP 03 40 08.6854 -35 37 34.647   13.44   12.68 13.3 ~ 127 1
35 LEDA 74879 GiC 03 40 33.86 -35 01 21.4   15.73   15.54   ~ 46 0
36 ESO 301-24 LSB 03 40 44.4 -37 24 30   17.52   16.09   ~ 22 0
37 2MASX J03405042-3544534 GiC 03 40 50.4165381120 -35 44 54.385434708   15.74       ~ 42 0
38 LEDA 74896 LSB 03 40 55.34 -37 50 16.8   16.3       ~ 21 0
39 LEDA 74915 GiC 03 41 31.83 -35 35 20.9   16.16       ~ 25 0
40 MCG-06-09-019 EmG 03 41 32.607 -34 53 18.01   13.95   13.02 13.8 ~ 106 0
41 2MASX J03414141-3510119 GiC 03 41 41.410 -35 10 11.99   15.70       ~ 41 1
42 LEDA 74933 GiC 03 42 17.2756218024 -35 32 26.556690480   16.26 16.31     ~ 41 0
43 NGC 1428 GiG 03 42 22.73 -35 09 14.4   13.77   12.49   ~ 125 0
44 NGC 1437A GiG 03 43 02.19 -36 16 24.1   13.92   13.09   ~ 87 0
45 LEDA 74970 GiC 03 44 44.4004984152 -35 41 01.444886628   16.10       ~ 25 0
46 LEDA 13749 GiC 03 44 59.9 -36 19 11   16.26       ~ 22 0
47 MCG-06-09-026 GiG 03 45 03.5753235792 -35 58 21.372259872   14.08   12.85   ~ 131 0
48 6dFGS gJ034545.4-362046 GiC 03 45 45.40 -36 20 47.5   16.01   15.11   ~ 40 0
49 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
50 NAME Carina II Dwarf Galaxy G 07 36 25.6 -57 59 57           ~ 86 0
51 NAME Car III Dwarf Galaxy G 07 38 31.2 -57 53 59           ~ 81 0
52 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 410 0
53 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
54 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
55 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
56 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
57 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
58 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 482 1
59 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
60 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
61 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
62 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
63 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 269 0
64 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 491 0
65 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
66 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
67 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
68 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
69 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
70 NAME Tuc II G 22 51 55.1 -58 34 08           ~ 192 0
71 NAME Grus I G 22 56 42.4 -50 09 48           ~ 126 0
72 NAME Tuc III G 23 56.6 -59 36           ~ 229 0
73 NAME Local Group GrG ~ ~           ~ 9325 0

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