2006A&A...458...79S


Query : 2006A&A...458...79S

2006A&A...458...79S - Astronomy and Astrophysics, volume 458, 79-88 (2006/10-4)

Globular cluster kinematics and X-ray emission in the early-type galaxy NGC 1399.

SAMUROVIC S. and DANZIGER I.J.

Abstract (from CDS):

Of the various observational methods used to address the question of dark matter in early-type galaxies there is the possibility of spatial overlap in using kinematics of stars, clusters and X-ray halos. To investigate methods for the determination of velocity distribution profiles and deviations from a Gaussian distribution using globular clusters in early-type galaxies, and the implications for dark matter. The maximum likelihood method together with standard statistical procedures were used to calculate the velocity dispersion. A new ``tracer mass estimator'' was applied to obtain a mass estimate based on the globular clusters, which is then compared to the mass obtained using X-rays. In NGC 1399 the departures from a Gaussian distribution of the velocities at all radial distances are small. Our conclusion is that in spite of the observations that show that the velocity dispersion decreases between 4 and 10Re there is evidence that dark matter exists beyond ∼3Re.

Abstract Copyright:

Journal keyword(s): Galaxy: kinematics and dynamics - galaxies: elliptical and lenticular, cD - galaxies: structure - dark matter - galaxies: individual: NGC 1399 - Galaxy: star clusters

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1530 1
2 NGC 1600 GiG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 358 0
3 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1432 0
4 IC 3370 LIN 12 27 37.3278534168 -39 20 16.247588712   11.99 12.12 10.39   ~ 146 0
5 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 2042 2
6 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 841 0
7 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4319 3
8 IC 1459 GiP 22 57 10.60682195 -36 27 43.9966421   10.96 11.85 9.34 10.3 ~ 608 2

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2023.01.27-13:07:21

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