Image Details

Choose export citation format:

First Results from the CHARA Array. VII. Long‐Baseline Interferometric Measurements of Vega Consistent with a Pole‐On, Rapidly Rotating Star

  • Authors: J. P. Aufdenberg, A. Mérand, V. Coudé du Foresto, O. Absil, E. Di Folco, P. Kervella, S. T. Ridgway, D. H. Berger, T. A. ten Brummelaar, H. A. McAlister, J. Sturmann, L. Sturmann, and N. H. Turner

Aufdenberg et al. 2006 The Astrophysical Journal 645 664.

  • Provider: AAS Journals

Caption: Fig. 2.

Best‐fit one‐dimensional, symmetric models in comparison with the CHARA/FLUOR data set. The dotted line is a bandwidth‐smeared uniform disk (﹩\chi ^{2}_{\nu }=38﹩, ﹩\theta _{\mathrm{UD}\,}=3.209\pm 0.003﹩ mas) The dashed line is a bandwidth‐smeared PHOENIX model atmosphere with parameters consistent with a slowly rotating Vega [﹩T_{\mathrm{eff}\,}\ =9550﹩ K, ﹩\mathrm{log}\,( g) =3.95﹩, ﹩\chi ^{2}_{\nu }=20﹩, ﹩\theta _{\mathrm{LD}\,}=3.259\pm 0.002﹩ mas], and the solid line a bandwidth‐smeared analytic limb‐darkening model, ﹩I\left(\mu \right)=\mu ^{\alpha }﹩ (﹩\chi ^{2}_{\nu }=1.5﹩, ﹩\theta _{\mathrm{LD}\,}=3.345\pm 0.006﹩ mas, ﹩\alpha =0.341\pm 0.013﹩). If extended emission in the ﹩K^{\prime }﹩ band is present at the 1.3% level in the Vega system, these best angular diameters are systematically high by ~3 ﹩\sigma ﹩ (see text).

Other Images in This Article
Copyright and Terms & Conditions