SIMBAD references

2000ApJ...539..149K - Astrophys. J., 539, 149-154 (2000/August-2)

Homogeneity of stellar populations in early-type galaxies with different X-ray properties.

KODAMA T. and MATSUSHITA K.

Abstract (from CDS):

We have found that the stellar populations of early-type galaxies are homogeneous with no significant difference in color or Mg₂ index, despite the dichotomy between X-ray-extended early-type galaxies and X-ray-compact ones. Since the X-ray properties reflect the potential gravitational structure and, hence, the process of galaxy formation, the homogeneity of the stellar populations implies that the formation of stars in early-type galaxies predates the epoch when the dichotomy of the potential structure was established.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Elliptical and Lenticular, cD - Galaxies: Evolution - Galaxies: Formation - Galaxies: ISM - Galaxies: Stellar Content

Simbad objects: 13

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