Communication Dans Un Congrès Année : 2008

Stellar radii from long-baseline interferometry

Résumé

Long baseline interferometers now measure the angular diameters of nearby stars with sub-percent accuracy. They can be translated in photospheric radii when the parallax is known, thus creating a novel and powerful constraint for stellar models. I present applications of interferometric radius measurements to the modeling of main sequence stars. Over the last few years, we obtained accurate measurements of the linear radius of many of the nearest stars: Procyon A, 61 Cyg A & B, alpha Cen A & B, Sirius A, Proxima. . . Firstly, I describe the example of our modeling of Procyon A (F5IV-V) with the CESAM code, constrained using spectrophotometry, the linear radius, and asteroseismic frequencies. I also present our recent results on the low-mass 61 Cyg system (K5V K7V), for which asteroseismic frequencies have not been detected yet.

Dates et versions

hal-03734912 , version 1 (21-07-2022)

Identifiants

Citer

Pierre Kervella. Stellar radii from long-baseline interferometry. The Art of Modelling Stars in the 21st Century, IAU Symposium 252, Apr 2008, Sanya, Hainan Island, China, Nanjing, China. pp.405-411, ⟨10.1017/S1743921308023326⟩. ⟨hal-03734912⟩
24 Consultations
0 Téléchargements

Altmetric

Partager

  • More