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

doi:10.1017/S1743921307007673

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 journal › Article › peer-review

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 language	English
Pages (from-to)	152-155
Number of pages	4
Journal	Proceedings of the International Astronomical Union
Volume	2
Issue number	S241
DOIs	https://doi.org/10.1017/S1743921307007673
Publication status	Published - Dec 2006
Externally published	Yes

Keywords

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

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10.1017/S1743921307007673

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title = "Modelling the near-IR spectra of red supergiant-dominated populations",

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.",

keywords = "galaxies: stellar content, galaxies: starburst, galaxies: star clusters, galaxies: individual (M82), infrared: galaxies, infrared: stars, stars: supergiants",

author = "Ariane Lan{\c c}on and Gallagher, {Jay S.} and {de Grijs}, Richard and Peter Hauschildt and Djazia Ladjal and Mustapha Mouhcine and Smith, {Linda J.} and Wood, {Peter R.} and Schreiber, {Natascha F{\"o}rster}",

year = "2006",

month = dec,

doi = "10.1017/S1743921307007673",

language = "English",

volume = "2",

pages = "152--155",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press (CUP)",

number = "S241",

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TY - JOUR

T1 - Modelling the near-IR spectra of red supergiant-dominated populations

AU - Lançon, Ariane

AU - Gallagher, Jay S.

AU - de Grijs, Richard

AU - Hauschildt, Peter

AU - Ladjal, Djazia

AU - Mouhcine, Mustapha

AU - Smith, Linda J.

AU - Wood, Peter R.

AU - Schreiber, Natascha Förster

PY - 2006/12

Y1 - 2006/12

N2 - 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.

AB - 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.

KW - galaxies: stellar content

KW - galaxies: starburst

KW - galaxies: star clusters

KW - galaxies: individual (M82)

KW - infrared: galaxies

KW - infrared: stars

KW - stars: supergiants

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DO - 10.1017/S1743921307007673

M3 - Article

AN - SCOPUS:37149030857

SN - 1743-9213

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SP - 152

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JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S241

ER -

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

Abstract

Keywords

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