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

Tadayuki Kodama, Kyoko Matsushita

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)149-154
Number of pages6
JournalAstrophysical Journal
Volume539
Issue number1 PART 1
DOIs
Publication statusPublished - 2000 Aug 10
Externally publishedYes

Keywords

  • Galaxies: ISM
  • Galaxies: elliptical and lenticular, cD
  • Galaxies: evolution
  • Galaxies: formation
  • Galaxies: stellar content

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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