Hostname: page-component-745bb68f8f-b6zl4 Total loading time: 0 Render date: 2025-01-24T05:07:46.634Z Has data issue: false hasContentIssue false
  • English
  • Français

Old Structure – Young Stars The Stellar Content of the Centre of the LMC Bar

Published online by Cambridge University Press:  25 May 2016

P. Linde ,
A. Ardeberg  and
B. Gustafsson
P. Linde
Affiliation:
Lund Observatory, Box 43, SE-221 00 Lund, Sweden, ({peter, arne} @astro, lu. se)
A. Ardeberg
Affiliation:
Lund Observatory, Box 43, SE-221 00 Lund, Sweden, ({peter, arne} @astro, lu. se)
B. Gustafsson
Affiliation:
Uppsala Astron. Observatory, Box 515, SE-751 20 Uppsala, Sweden ([email protected])

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The history of star formation and chemical evolution are studied in the LMC Bar centre with the HST PC and WFC and uvby photometry. Using dedicated image processing, we secured high spatial resolution and photometric quality. We present colour magnitude diagrams (CMDs) from PC and WFC y and b data. The PC provides a CMD close to complete to V = 23.5, the WFC contributes favourable statistics on brighter stars. We find a population of stars seemingly around or younger than 0.2 Gyr comprising around 30% of the total amount of stars. Star formation seems to have decreased 3-0.2 Gyr ago. Older populations are aged 3–9 Gyr. Stars older than 10 Gyr seem rare if not absent. Our CMD morphology and, especially, our uvby metallicity index give [Me/H] close to −0.4, with older stars more and younger stars less metal poor.

Type
Part 2: The Database
Information
Symposium - International Astronomical Union , Volume 192: The Stellar Content of Local Group Galaxies , 1999 , pp. 108 - 111
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Ardeberg, A., Gustafsson, B., Linde, P. 1998a, Proc. IAU Symp. 190, in press CrossRefGoogle Scholar
Ardeberg, A., Linde, P., Lindgren, H., Lyngå, G. 1985, A&A, 148, 263 Google Scholar
Ardeberg, A., Lindgren, H., Lundström, I. 1998b, in manuscript Google Scholar
Bergbusch, P.A., VandenBerg, D.A. 1992, ApJS, 81, 163 Google Scholar
Edvardsson, B., Eriksson, K., Gustafsson, B., Joergensen, , Plez, B. 1998, in prep.Google Scholar
Geisler, D., Bica, E., Dottori, H., Clara, J.J., Piatti, J.F.C., Santos, J.F.C. 1997, AJ, 114, 1920 Google Scholar
Linde, P., Ardeberg, A., Gustafsson, B. 1998, Proc. IAU Symp. 190, in press Google Scholar
Snel, R.C. 1998, A&AS, 129, 195 Google Scholar
Taff, L.G. 1974, AJ, 79, 1280 Google Scholar
van den Bergh, S. 1998, Proc. IAU Symp. 190, in press Google Scholar