Modelling the near-IR spectra of red supergiant-dominated populations

Ariane Lançon*, Jay S. Gallagher, Richard de Grijs, Peter Hauschildt, Djazia Ladjal, Mustapha Mouhcine, Linda J. Smith, Peter R. Wood, Natascha Förster Schreiber

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We report on recent progress in the modelling of the near-IR spectra of young stellar populations, i.e. populations in which red supergiants (RSGs) are dominant. First, we discuss the determination of fundamental parameters of RSGs from Phoenix model fits to their near-IR spectra; RSG-specific surface abundances are accounted for and effects of the microturbulence parameter are explored. New population synthesis predictions are then described and, as an example, it is shown that the spectra of young star clusters in M 82 can be reproduced very well from 0.5 to 2.4 μm. We warn of remaining uncertainties in cluster ages.

Original languageEnglish
Pages (from-to)152-155
Number of pages4
JournalProceedings of the International Astronomical Union
Volume2
Issue numberS241
DOIs
Publication statusPublished - Dec 2006
Externally publishedYes

Keywords

  • galaxies: stellar content
  • galaxies: starburst
  • galaxies: star clusters
  • galaxies: individual (M82)
  • infrared: galaxies
  • infrared: stars
  • stars: supergiants

Fingerprint Dive into the research topics of 'Modelling the near-IR spectra of red supergiant-dominated populations'. Together they form a unique fingerprint.

  • Cite this

    Lançon, A., Gallagher, J. S., de Grijs, R., Hauschildt, P., Ladjal, D., Mouhcine, M., ... Schreiber, N. F. (2006). Modelling the near-IR spectra of red supergiant-dominated populations. Proceedings of the International Astronomical Union, 2(S241), 152-155. https://doi.org/10.1017/S1743921307007673