ZOREC , J.

Using 2D models of rotating stars, the interferometric measurements of alpha Eri and its fundamental parameters corrected for gravitational darkening effects we infer that the star might have a core rotating 2.7 times faster than the surface. We explore the consequences on spectral lines produced by surface differential rotation combined with...

Using 2D models of rotating stars, the interferometric measurements of alpha Eri and its fundamental parameters corrected for gravitational darkening effects we infer that the star might have a core rotating 2.7 times faster than the surface. We explore the consequences on spectral lines produced by surface differential rotation combined with...

Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, eds. S. Stefl, S. Owocki and A. Okazaki, ASP Conference Series 361, p. 542 (2007)

International audience

Astronomy and Astrophysics, v. 445, p. 931-937, 2006. http://dx.doi.org/10.1051/0004-6361:20052760

Astron. & Astrophys., 409, pp. 275-286 (2003)

VizieR On-line Data Catalog: J/A+A, 409, p. 275 (2003)

Context. The interpretation of stellar apparent fundamental parameters (viewing-angle dependent) requires that they be treated consistently with the characteristics of their surface rotation law.Aims. We aim to develop a model to determine the distribution of the effective temperature and gravity, which explicitly depend on the surface...

Context. Canopus, the brightest and closest yellow supergiant to our Solar System, offers a unique laboratory for understanding the physics of evolved massive stars.Aims. We aim at quantitatively exploring a large space of fundamental parameters of Canopus based on the combined analysis of its spectral energy distribution (SED) and optical-IR...

Astron. and Astroph., 418, pp. 781-794 (2004)

International audience

International audience

International audience

Aims. We assume that stars may undergo surface differential rotation to study its impact on the interpretation of Vsini and on the observed distribution Φ(u) of ratios of true rotational velocities u = V/Vc (Vc is the equatorial critical velocity). We discuss some phenomena affecting the formation of spectral lines and their broadening, which...