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Models of very-low-mass stars, brown dwarfs and exoplanets by F. Allard, D. Homeier, and B. Freytag Philosophical Transactions A Volume 370(1968):2765-2777.

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Presentation on theme: "Models of very-low-mass stars, brown dwarfs and exoplanets by F. Allard, D. Homeier, and B. Freytag Philosophical Transactions A Volume 370(1968):2765-2777."— Presentation transcript:

1 Models of very-low-mass stars, brown dwarfs and exoplanets by F. Allard, D. Homeier, and B. Freytag Philosophical Transactions A Volume 370(1968):2765-2777 June 13, 2012 ©2012 by The Royal Society

2 Synthetic spectra compared with the infrared spectral energy distribution of the M8e dwarf VB10 using identical model parameters (Teff=2800 K, ) and a resolution of 50 Å with different water vapour opacity sources: the Base grid by Allard & Hauschildt [13]... F. Allard et al. Phil. Trans. R. Soc. A 2012;370:2765-2777 ©2012 by The Royal Society

3 A BT-Settl synthetic spectrum with and solar metallicity by Asplund et al. [21] (thin grey/green full line; [M/H]=0.0) compared with the combined SED of the red dwarf triple system Gl 866 [24,25]. F. Allard et al. Phil. Trans. R. Soc. A 2012;370:2765-2777 ©2012 by The Royal Society

4 The estimated Teff for M dwarfs by Casagrande et al. [27] and for brown dwarfs by Golimowski et al. [28] and Vrba et al. [29] are compared with the NextGen isochrones for 5 Gyr [30,31] using various generations of model atmospheres: NextGen (thick black lin... F. Allard et al. Phil. Trans. R. Soc. A 2012;370:2765-2777 ©2012 by The Royal Society

5 Same plot as figure 3 but zooming out and extending into the brown dwarf region of the diagram. F. Allard et al. Phil. Trans. R. Soc. A 2012;370:2765-2777 ©2012 by The Royal Society


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