Near-infrared surface brightness fluctuations and optical colours of Magellanic star clusters
| Autor: | Mustapha Mouhcine, Bertrand de Batz, Rosa A. González-Lópezlira, Gustavo Bruzual, Michael C. Liu, Marna Y. Albarran |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
Star formation Metallicity Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Galaxy Stars Star cluster Space and Planetary Science Magnitude (astronomy) Astrophysics::Solar and Stellar Astrophysics Surface brightness Astrophysics::Galaxy Astrophysics Spiral |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 363:1279-1289 |
| ISSN: | 0035-8711 |
| Popis: | This work continues our efforts to calibrate model surface brightness luminosities for the study of unresolved stellar populations, through the comparison with data of Magellanic Cloud star clusters. We present here the relation between absolute K_s-band fluctuation magnitude and (V - I) integrated colour, using data from the 2MASS and DENIS surveys, and from the literature. We compare the star cluster sample with the sample of early-type galaxies and spiral bulges studied by Liu et al. (2002). We find that intermediate-age to old clusters lie along a linear correlation with the same slope, within the errors, of that defined by the galaxies in the barM_{K_s} vs. (V - I) diagram. While the calibration by Liu et al. was determined in the colour range 1.05 = barM_{K_s} >= -9, 0.3 |
| Databáze: | OpenAIRE |
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