06 NGC1600- CLUSTER OR FIELD ELLIPTICAL? (original) (raw)

2008

Abstract

A study of the galaxy distribution in the field of the elliptical galaxy NGC1600 has been undertaken. Although this galaxy is often classified as a member of a loose group, all the neighbouring galaxies are much fainter and could be taken as satellites of NGC1600. The number density profile of galaxies in the field of this galaxy shows a decline with radius, with evidence of a background at approximately 1.3 Mpc. The density and number density profile are consistent with that found for other isolated early-type galaxies. NGC1600 appears as an extended source in X-rays, and the center of the X-ray emission seems not to coincide with the center of the galaxy. The velocity distribution of neighbouring galaxies has been measured from optical spectroscopic observations and shows that the mean radial velocity is approximately 85 km s −1 less than that of NGC1600, indicating that the centre of mass could lie outside the galaxy. The velocity dispersion of the ‘group ’ is estimated at 429 ± ...

Vicent Martínez hasn't uploaded this paper.

Let Vicent know you want this paper to be uploaded.

Ask for this paper to be uploaded.