2006ApJ...641L.109C

Query : 2006ApJ...641L.109C

2006ApJ...641L.109C - Astrophys. J., 641, L109-L112 (2006/April-3)

The extended H I rotation curve and mass distribution of M31.

CARIGNAN C., CHEMIN L., HUCHTMEIER W.K. and LOCKMAN F.J.

Abstract (from CDS):

New H I observations of Messier 31 (M31) obtained with the Effelsberg and Green Bank 100 m telescopes make it possible to measure the rotation curve of that galaxy out to ∼35 kpc. Between 20 and 35 kpc, the rotation curve is nearly flat at a velocity of ∼226 km/s. A model of the mass distribution shows that at the last observed velocity point, the minimum dark-to-luminous mass ratio is ∼0.5 for a total mass of 3.4x1011 M☉ at R<35 kpc. This can be compared to the estimated Milky Way mass of 4.9x1011 M☉ for R<50 kpc.

Abstract Copyright: ∼

Journal keyword(s): galaxies: fundamental parameters (masses) - Galaxies: Halos - Galaxies: Individual: Messier Number: M31 - Galaxies: Kinematics and Dynamics - Galaxies: Structure - Galaxies: Local Group

Simbad objects: 7

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Number of rows : 7
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1934 1
3 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 1051 2
4 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 946 1
5 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
6 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
7 NAME Local Group GrG ~ ~           ~ 9325 0

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