Upper panel: the ZYJHKS VISTA transmission bands. An example of a normalized NextGen spectrum (Hauschildt et al. 1999) with Teff = 2500 K is overplotted. Lower panel: theoretical MJ vs. J − KS diagram. The isochrones, shifted to the distance of 10 pc (i.e., absolute magnitudes), are in the VISTA photometric system. Different curve styles correspond to different ages, as indicated in the legend. We plot in blue the isochrones computed using the NextGen/AMES-Dusty atmospheric models, and in red those computed using the NextGen/AMES-Cond models.
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