SIMBAD references

2000ApJS..128...85Q - Astrophys. J., Suppl. Ser., 128, 85-98 (2000/May-0)

A NICMOS survey of early-type galaxy centers: the relation between core properties, gas and dust content, and environment.


Abstract (from CDS):

We present a NICMOS 1.6 µm imaging isophotal study of 27 early-type galaxies. Core galaxies have reduced ellipticity and boxiness near and within their core or break radius. This supports a core formation mechanism that mixes or scatters stars such as scattering caused by a binary black hole. We find the same trends between central surface brightness and luminosities as the WPFC studies. We find no correlation between core properties and dust mass or X-ray luminosity, suggesting that processes determining the current gas content (e.g., such as minor mergers and cooling flows) are unrelated to processes occurring during core formation. Core galaxies exist in a variety of environments ranging from poor groups to large clusters. A combined sample suggests that galaxy groups may harbor more luminous power-law galaxies than clusters such as Virgo and Fornax.

Abstract Copyright:

Journal keyword(s): Galaxies: Clusters: General - Galaxies: Elliptical and Lenticular, cD - Galaxies: Kinematics and Dynamics - Galaxies: Structure - Infrared: Galaxies

Simbad objects: 33

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