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The age of the Galaxy's thick disk

In English

Författare

Summary, in English

We discuss the age of the stellar disks in the solar neighborhood. After reviewing the various methods for age dating, we discuss current estimates of the ages of both the thin- and the thick disks. We present preliminary results for kineymatically-selected stars that belong to the thin- as well as the thick disk. All of these dwarf and sub-giant stars have been studied spectroscopically and we have derived both elemental abundances as well as ages for them. A general conclusion is that in the solar neighborhood, on average, the thick disk is older than the thin disk. However, we caution that the exclusion of stars with effective temperatures around 6500 K might result in a biased view of the full age distribution for the stars in the thick disk.

Publiceringsår

2009

Språk

Engelska

Sidor

23-30

Publikation/Tidskrift/Serie

Proceedings of the International Astronomical Union, IAU Proceedings

Volym

258

Dokumenttyp

Konferensbidrag

Förlag

Cambridge University Press

Ämne

  • Astronomy, Astrophysics and Cosmology

Nyckelord

  • stars: late-type
  • Galaxy: disk
  • Galaxy: structure
  • kinematics and dynamics
  • solar
  • Hertzsprung-Russell diagram
  • neighborhood

Conference name

Ages of stars

Conference date

2008-10-13 - 2008-10-17

Status

Published

Forskningsgrupp

  • Observational and Theoretical Astrophysics

ISBN/ISSN/Övrigt

  • ISSN: 1743-9213
  • ISSN: 1743-9221