Stellar populations in galaxies: Progress on the milky way, on dwarf irregulars, and on elliptical galaxies

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Abstract

I discuss specific topics of stellar populations where major progress is occurring. Large surveys like the MACHO Project are contributing to our understanding of the inner structure of our Galaxy. Towards these inner regions, different components (bulge, inner halo, and inner thin and thick disks) overlap. We can learn much about these stellar populations using the MACHO database. We expect major progress in the study of the outer Milky Way halo in following years from the SDSS database. Very distant BHB stars located in the outskirts of the halo would be identified. I also describe recent observations of nearby dwarf irregular galaxies, and discuss what they tell us about their stellar content, and about the way these galaxies form. It is now possible to construct deep luminosity functions and color-magnitude diagrams for galaxies beyond the Local Group. I finally review recent work on the resolved stellar populations of the giant early type galaxy NGC 5128.

Original languageEnglish
Pages (from-to)73-80
Number of pages8
JournalRevista Mexicana de Astronomia y Astrofisica: Serie de Conferencias
Volume11
Publication statusPublished - 2001

Keywords

  • Galaxies: NGC 3109, WLM, NGC 5128
  • Galaxies: spirals, dwarf irregulars, giant ellipticals
  • Milky way: Halo, disk
  • Stars: RR lyrae, BHB
  • Stars: stellar populations

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

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