SIMBAD references

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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