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Modelling the Near-IR Spectra of Red Supergiant-dominated Populations
A. Lançon, J. S. Gallagher, R. de Grijs +6
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…
Discovery of a nearby M9 dwarf
N. Phan-Bao, M. S. Bessell, E. L. Martin +8
We report the discovery of a new M9.0 dwarf at only 8.2 pc, which we identified in our search for nearby ultracool dwarf (I-J >= 3.0, later than M8.0) in the DENIS database. We mea…
Long period variables in the globular cluster 47 Tuc: radial velocity variations
T. Lebzelter, P. R. Wood, K. H. Hinkle +2
We present near infrared velocity curves for 12 long period variables (LPVs) in the globular cluster 47 Tuc (NGC 104). New light curves are also presented for these variables. Resu…
A study of bright Southern Long Period Variables
T. Lebzelter, K. H. Hinkle, P. R. Wood +2
In this paper we present radial velocity curves of AGB variables that exhibit various kinds of anomalies: Semiregular variables (SRVs) with typical mira periods, SRVs exceeding the…
Optical and Near-IR Spectra of O-rich Mira Variables : a Comparison between Models and Observations
A. Tej, A. Lancon, M. Scholz +1
Pulsation models are crucial for the interpretation of spectrophotometric and interferometric observations of Mira variables. Comparing predicted and observed spectra is one way of…