2018Natur.555..629V


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.29CET21:57:35

2018Natur.555..629V - Nature, 555, 629-632 (2018)

A galaxy lacking dark matter.

VAN DOKKUM P., DANIELI S., COHEN Y., MERRITT A., ROMANOWSKY A.J., ABRAHAM R., BRODIE J., CONROY C., LOKHORST D., MOWLA L., O'SULLIVAN E. and ZHANG J.

Abstract (from CDS):

Studies of galaxy surveys in the context of the cold dark matter paradigm have shown that the mass of the dark matter halo and the total stellar mass are coupled through a function that varies smoothly with mass. Their average ratio Mhalo/Mstars has a minimum of about 30 for galaxies with stellar masses near that of the Milky Way (approximately 5 x 1010 solar masses) and increases both towards lower masses and towards higher masses. The scatter in this relation is not well known; it is generally thought to be less than a factor of two for massive galaxies but much larger for dwarf galaxies. Here we report the radial velocities of ten luminous globular-cluster-like objects in the ultra-diffuse galaxy NGC1052-DF2, which has a stellar mass of approximately 2 x 108 solar masses. We infer that its velocity dispersion is less than 10.5 kilometres per second with 90 per cent confidence, and we determine from this that its total mass within a radius of 7.6 kiloparsecs is less than 3.4 x 108 solar masses. This implies that the ratio Mhalo/Mstars is of order unity (and consistent with zero), a factor of at least 400 lower than expected. NGC1052-DF2 demonstrates that dark matter is not always coupled with baryonic matter on galactic scales.

Abstract Copyright:

Journal keyword(s): Cosmology - Galaxies and clusters

Nomenclature: Figs. 1-2: [VDC2018] GC NNN N=10 among (Nos 39-101). Text: [VDC2018] NGC1052–DF2 N=1.

CDS comments: NGC1052-DF2 is LEDA 3097693, and DFX1 is GMP 2175 in SIMBAD.

Simbad objects: 25

goto Full paper

goto View the reference in ADS

Number of rows : 25

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 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 107 0
2 NAME Andromeda XXV G 00 30 08.9 +46 51 07     14.8     ~ 82 0
3 NGC 1042 GiP 02 40 23.9725496856 -08 26 00.749394900 11.47 11.56 11.02 11.7 11.4 ~ 215 1
4 NGC 1047 GiP 02 40 32.8403872524 -08 08 51.646846700   14.50       ~ 48 1
5 MCG-02-07-058 LIN 02 40 35.6465202573 -08 32 49.552293501   18.60 17.87 14.00   ~ 26 0
6 NGC 1048 LIN 02 40 37.927 -08 32 00.14   14   13.84   ~ 24 0
7 NGC 1052 GiP 02 41 04.79851 -08 15 20.7517 11.84 11.41 10.47 10.71   ~ 1119 2
8 NAME NGC 1052 Group GrG 02 41 09.3 -08 07 10           ~ 43 0
9 [VDC2018] GC 91 GlC 02 41 42.17 -08 23 54.0           ~ 4 0
10 [VDC2018] GC 39 GlC 02 41 45.07 -08 25 24.9           ~ 7 0
11 [VDC2018] GC 71 GlC 02 41 45.13 -08 24 23.0           ~ 5 0
12 [VDC2018] GC 101 GlC 02 41 45.21 -08 23 28.3           ~ 4 0
13 LEDA 3097693 LSB 02 41 46.5 -08 24 08     16.2   15.8 ~ 52 0
14 [VDC2018] GC 77 GlC 02 41 46.54 -08 24 14.0           ~ 8 0
15 [VDC2018] GC 92 GlC 02 41 46.90 -08 23 51.1           ~ 6 0
16 [VDC2018] GC 98 GlC 02 41 47.34 -08 23 35.2           ~ 8 0
17 [VDC2018] GC 85 GlC 02 41 47.75 -08 24 05.9           ~ 6 0
18 [VDC2018] GC 59 GlC 02 41 48.08 -08 24 57.5           ~ 5 0
19 [VDC2018] GC 73 GlC 02 41 48.22 -08 24 18.1           ~ 6 0
20 ACO 545 ClG 05 32 24.4152 -11 32 35.080           ~ 86 0
21 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4136 2
22 [VAM2015] DF44 LSB 13 00 58.0 +26 58 35           ~ 46 0
23 GMP 2175 G 13 01 15.4 +27 12 40           ~ 13 0
24 NAME Andromeda XXI G 23 54 47.7 +42 28 15     14.8     ~ 83 0
25 NAME Local Group GrG ~ ~           ~ 6776 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018Natur.555..629V and select 'bookmark this link' or equivalent in the popup menu


2020.01.29-21:57:35

© Université de Strasbourg/CNRS

    • Contact