2002A&A...394L..15B


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET20:49:46

2002A&A...394L..15B - Astronomy and Astrophysics, volume 394, L15-18 (2002/10-4)

A metallicity-flattening relation for dwarf elliptical galaxies.

BARAZZA F.D. and BINGGELI B.

Abstract (from CDS):

It is shown that bright cluster dwarf ellipticals follow a relation between metallicity and apparent flattening. Rounder dwarfs tend to be more metal-rich. The evidence is based on colour as well as spectroscopic line-strength data from the literature. The large scatter of dEs around the mean metallicity-luminosity relation, usually ascribed to large observational errors, turns out to be an ellipticity effect. In the magnitude range -14>MB>-18 the metallicity of dEs depends more strongly on ellipticity than luminosity. A possible explanation is that galaxies with masses around 109M suffered a partial blowout of metal-enriched gas along their minor axis, rendering ellipticity a critical parameter for metallicity (De Young & Heckman, 1994ApJ...431..598D).

Abstract Copyright:

Journal keyword(s): galaxies: general - galaxies: fundamental parameters - galaxies: elliptical - galaxies: dwarf - galaxies: evolution

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1518 1
2 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6349 3

    Equat.    Gal    SGal    Ecl

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