2017MNRAS.466..974C


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.28CET13:46:50

2017MNRAS.466..974C - Mon. Not. R. Astron. Soc., 466, 974-995 (2017/March-3)

The density of dark matter haloes of early-type galaxies in low-density environments.

CORSINI E.M., WEGNER G.A., THOMAS J., SAGLIA R.P. and BENDER R.

Abstract (from CDS):

New photometric and long-slit spectroscopic observations are presented for NGC 7113, PGC 1852, and PGC 67207 which are three bright galaxies residing in low-density environments. The surface-brightness distribution is analysed from the KS-band images taken with adaptive optics at the Gemini North Telescope and the ugriz-band images from the Sloan Digital Sky Survey while the line-of-sight stellar velocity distribution and line-strength Lick indices inside the effective radius are measured along several position angles. The age, metallicity, and α-element abundance of the galaxies are estimated from single stellar-population models. In spite of the available morphological classification, images show that PGC 1852 is a barred spiral which we do not further consider for mass modelling. The structural parameters of the two early-type galaxies NGC 7113 and PGC 67207 are obtained from a two-dimensional photometric decomposition and the mass-to-light ratio of all the (luminous and dark) mass that follows the light is derived from orbit-based axisymmetric dynamical modelling together with the mass density of the dark matter halo. The dynamically derived mass that follows the light is about a factor of 2 larger than the stellar mass derived using stellar-population models with Kroupa initial mass function. Both galaxies have a lower content of halo dark matter with respect to early-type galaxies in high-density environments and in agreement with the predictions of semi-analytical models of galaxy formation.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: abundances - galaxies: elliptical and lenticular, cD - galaxies: formation - galaxies: haloes - galaxies: kinematics and dynamics - galaxies: stellar content - galaxies: stellar content

Simbad objects: 7

goto Full paper

goto View the reference in ADS

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 - 2020
#notes
1 MCG+01-02-015 G 00 30 28.657 +05 51 40.52   15.2       ~ 14 0
2 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 646 1
3 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4134 2
4 NGC 7113 GiP 21 42 26.638 +12 34 09.37   15.2       ~ 14 0
5 MCG+02-55-008 GiG 21 42 26.8779258985 +13 53 58.975942363   15.4       ~ 16 0
6 ESO 287-57 G 21 45 18.823 -45 56 41.81   16.17   15.10   ~ 6 0
7 FS 152 * 22 27 16.12 +19 16 59.2   14.60 13.57     K1 5 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2017MNRAS.466..974C and select 'bookmark this link' or equivalent in the popup menu


2020.01.28-13:46:50

© Université de Strasbourg/CNRS

    • Contact