2003MNRAS.340...12W

Query : 2003MNRAS.340...12W

2003MNRAS.340...12W - Mon. Not. R. Astron. Soc., 340, 12-28 (2003/March-3)

A high-resolution rotation curve of NGC 6822: a test-case for cold dark matter.

WELDRAKE D.T.F., DE BLOK W.J.G. and WALTER F.

Abstract (from CDS):

We present high-resolution rotation curves of the Local Group dwarf irregular galaxy NGC 6822 obtained with the Australia Telescope Compact Array. Our best curves have an angular resolution of 8 arcsec or 20 pc and contain some 250 independent points. The stellar and gas components of NGC 6822 cannot explain the shape of the curve, except for the very inner regions, and NGC 6822 is consequently very dark-matter-dominated. There is no evidence for the presence of a steep density cusp down to scales of ∼20 pc, contrary to the predictions of cold dark matter.

Abstract Copyright: 2003 RAS

Journal keyword(s): galaxies: dwarf - galaxies: fundamental parameters - galaxies: individual: NGC 6822 - galaxies: kinematics and dynamics - Local Group - dark matter

CDS comments: 'Local Group Cloud' = NAME LOCAL GROUP.

Simbad objects: 1

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Number of rows : 1
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 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0

Query : 2003MNRAS.340...12W

Basic data :
NGC 6822 -- Galaxy
Other object types: otypes_help 		G (2008ApJ,DDO,...), IR (IRAS,PSCz,...), HI (HIPASS)
ICRS coord. (ep=J2000) : 		19 44 56.199 -14 47 51.29 (Infrared) [ ] C 2006AJ....131.1163S
FK4 coord. (ep=B1950 eq=1950) : 		19 42 06.468 -14 55 08.80 [ ]
Gal coord. (ep=J2000) : 		025.342467 -18.391181 [ ]
Radial velocity / Redshift / cz : 		V(km/s) -57.0 [2.0] / z(spectroscopic) -0.000190 [0.000007] / cz -56.99 [2.00]
   C 2012AJ....144....4M
Morphological type: 		IBm D 2013MNRAS.431.2006K
Angular size (arcmin): 		13.80 12.88 ~ (Opt) D 2003A&A...412...45P
Fluxes (5) :
B 18 [~] E ~
V 8.1 [0.2] D 2012AJ....144....4M
J 7.483 [0.025] C 2006AJ....131.1163S
H 6.916 [0.030] C 2006AJ....131.1163S
K 6.724 [0.045] C 2006AJ....131.1163S
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 3
: 3480 		: 103 Display criteria :

Identifiers (15) :
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NGC 6822 IRAS 19421-1455 NAME Barnard's Galaxy [IBK96] 6
DDO 209 LEDA 63616 PSCz P19421-1455 [M98c] 194208.1-145529
HIPASS J1944-14 2MASX J19445619-1447512 TC 374 [MI94] Im 153
IC 4895 MCG-02-50-006 [CWA2006] NGC 6822 11

References (1661 between 1850 and 2026) (Total 1661)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 2    Distance : 11    Fe/H : 1   

   

Observing logs
Herschel : 15    ISO : 12   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 6822

Link by name to the catalogue in VizieR :

NGC 6822 HIPASS J1944-14 IRAS 19421-1455 2MASX J19445619-1447512

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