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 journalArticlepeer-review


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
Issue numberS241
Publication statusPublished - Dec 2006
Externally publishedYes


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


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