Tracers of stellar mass loss - I. Optical and near-IR colours and surface brightness fluctuations
Por:
González-Lópezlira R.A., Bruzual-A. G., Charlot S., Ballesteros-Paredes J., Loinard L.
Publicada:
11 abr 2010
Resumen:
We present optical and infrared (IR) integrated colours and surface brightness fluctuation (SBF) magnitudes, computed from stellar population synthesis models that include emission from the dusty envelopes surrounding thermally pulsing asymptotic giant branch (TP-AGB) stars undergoing mass loss. We explore the effects of varying the mass-loss rate by one order of magnitude around the fiducial value, modifying accordingly both the stellar parameters and the output spectra of the TP-AGB stars plus their dusty envelopes. The models are single burst, and range in age from a few Myr to 14 Gyr, and in metallicity between Z = 0.0001 and 0.07; they combine new calculations for the evolution of stars in the TP-AGB phase, with star plus envelope spectral energy distributions (SEDs) produced with the radiative transfer code dusty. We compare these models to optical and near-IR data of single AGB stars and Magellanic star clusters. This comparison validates the current understanding of the role of
Filiaciones:
González-Lópezlira R.A.:
Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico
Bruzual-A. G.:
Centro de Investigaciones de Astronomía, Apartado postal 264, Mérida 5101-A, Venezuela
Charlot S.:
UPMC Univ Paris 06, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
CNRS, UMR7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
Ballesteros-Paredes J.:
Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico
Loinard L.:
Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico
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