2014A&A...570A.132S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST18:59:03

2014A&A...570A.132S - Astronomy and Astrophysics, volume 570A, 132-132 (2014/10-1)

Investigation of dark matter and modified Newtonian dynamics in early-type galaxies through globular cluster systems.

SAMUROVIC S.

Abstract (from CDS):

The departures from Newtonian dynamics based on the mass-follows-light approach discovered in the outer parts of some early-type galaxies imply the existence of dark matter and/or necessary modifications to the Newtonian approach. We study dynamical models of a sample of ten early-type galaxies in both Newtonian and MOND approaches. The measurements of the radial velocities of the globular clusters in ten massive early-type galaxies are used to test the predictions of dynamical models with and without dark matter assuming Newtonian and MOND approaches out to several effective radii. The globular clusters taken from the SLUGGS database are used as tracers of the gravitational potential of the galaxies in a sample. We solve the Jeans equation for both the Newtonian (mass-follows-light and dark matter models) and the MOND approaches by assuming spherical symmetry and compare the resulting mass-to-light ratios with stellar population synthesis models. For both approaches, we apply various assumptions on velocity anisotropy. We find that the Newtonian mass-follows-light models without a significant amount of dark matter can provide successful fits for only one galaxy (NGC 2768), and for the remaining nine early-type galaxies, various amounts of dark matter are required in the outer parts beyond 2-3Re. With MOND models, we find that four early-type galaxies could be fit without dark matter and that the remaining six galaxies require an additional dark component to successfully fit the line-of-sight observed velocity dispersions; the galaxy NGC 4486 (M87) is the only galaxy for which dark matter is required in the inner regions, and MOND cannot fit the data without additional dark matter. In the inner region, the galaxy NGC 4365 requires higher mass-to-light ratios than the stellar values from population synthesis, but a reasonable mass-to-light ratio can be reached for MOND assuming slightly tangential orbits. The ten galaxies can be split into two classes: those with concentrations at (NGC 1407) or above the ΛCDM concentration-mass relation, given their measured virial masses, and those below this relation. The former generally require dark matter in both Newtonian and MOND approaches, while the latter do not require appreciable amounts of dark matter.

Abstract Copyright:

Journal keyword(s): gravitation - galaxies: elliptical and lenticular, cD - galaxies: kinematics and dynamics - galaxies: halos

Simbad objects: 45

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Number of rows : 45

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 ACO 30 ClG 00 26 44 -12 11.4           ~ 12 1
2 NAME Eridanus ClG GrG 00 30 00 -21 30.0           ~ 146 0
3 ACO 70 ClG 00 37 20 -07 25.5           ~ 8 0
4 V* R Scl C* 01 26 58.0946233986 -32 32 35.437732667 17.26 9.59 5.72 3.69 2.30 C-N5+ 297 0
5 NGC 720 GiG 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 493 0
6 NGC 821 G 02 08 21.150 +10 59 41.53   12.210 11.310 10.739 9.744 ~ 538 0
7 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1449 1
8 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1538 0
9 NGC 1400 EmG 03 39 30.851 -18 41 17.25 12.48 12.01 10.96 10.45   ~ 280 1
10 NGC 1407 GiG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 527 1
11 V* U Cam C* 03 41 48.1762532767 +62 38 54.397016016   11.5 11.00     C-N5 230 0
12 NGC 1521 GiG 04 08 18.937 -21 03 06.98   12.31   10.73   ~ 105 0
13 SH 2-216 PN 04 43 21.2636696575 +46 42 05.836016165   12.50 12.87 13.04   DAO.6 150 2
14 V* ST Cam C* 04 51 13.3478339517 +68 10 07.646494913   9.77 9.20     C-N5 136 0
15 * alf Ori s*r 05 55 10.30536 +07 24 25.4304 4.38 2.27 0.42 -1.17 -2.45 M1-M2Ia-Iab 1466 0
16 NGC 2434 GiG 07 34 51.1487209121 -69 17 03.008825858 12.82 12.50 11.26 10.84   ~ 177 1
17 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 467 2
18 NGC 3115 GiG 10 05 13.978 -07 43 06.89   11   9.37   ~ 928 2
19 V* VY UMa C* 10 45 04.0305145913 +67 24 40.983504682 12.91 8.34 5.95 4.20 2.94 C-N5 189 0
20 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 730 1
21 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1380 0
22 NAME M96 Group GrG 10 48 +13.3           ~ 278 0
23 V* R Crt AB* 11 00 33.8541158313 -18 19 29.574953304   10.33 9.80     M7/8III 191 0
24 NGC 4278 LIN 12 20 06.82563 +29 16 50.7124 11.54 11.09 10.16     ~ 888 2
25 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 798 0
26 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1635 2
27 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5825 0
28 IC 3370 LIN 12 27 37.310 -39 20 16.13   11.99 12.12 10.39   ~ 142 0
29 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1959 2
30 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6213 3
31 NGC 4494 GiP 12 31 24.034 +25 46 29.93   10.55 9.74     ~ 451 0
32 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1041 1
33 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3999 3
34 PN MyCn 18 PN 13 39 35.0560904148 -67 22 51.758576199   13.30 12.54 13.19 12.61 ~ 265 1
35 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 772 1
36 V* V Pav C* 17 43 18.9385755525 -57 43 26.280846211   10.11 6.673 7.14 8.88 C6,4 61 0
37 NGC 6543 PN 17 58 33.4042519454 +66 37 58.748961810   11.09 11.28     [WC] 1122 1
38 M 57 PN 18 53 35.0969571234 +33 01 44.883146221   15.405 15.769 15.901 16.062 DA(O?) 790 2
39 NGC 6751 PN 19 05 55.5385116189 -05 59 32.291075445   15.78 15.48     [WC4] 318 0
40 V* W Aql S* 19 15 23.3581458294 -07 02 50.308513461   12.72 10.14     S6/6e 206 0
41 V* UX Dra C* 19 21 35.5158242859 +76 33 34.549597671   8.81 5.94     C-N5 186 0
42 NGC 6894 PN 20 16 23.965 +30 33 53.17           ~ 193 0
43 NGC 7457 G 23 00 59.9274269967 +30 08 41.794468187   11.04 11.87     ~ 409 0
44 NGC 7507 GiG 23 12 07.595 -28 32 22.70   11.60   9.98   ~ 167 0
45 V* R Aqr Sy* 23 43 49.4629939776 -15 17 04.184232557   8.823 7.683 9.37   M6.5-8.5e 736 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-18:59:03

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