The Convection of Close Red Supergiant Stars Observed With Near-Infrared Interferometry

M. Montargès (1, 2) , P. Kervella (3, 2) , G. Perrin (2) , A. Chiavassa (4) , M. Aurière (5)

1 IRAM - Institut de RadioAstronomie Millimétrique
2 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
3 LFCA - Laboratoire Franco-Chilien d'Astronomie
4 LAGRANGE - Joseph Louis LAGRANGE
5 IRAP - Institut de recherche en astrophysique et planétologie

Our team has obtained observations of the photosphere of the two closest red supergiant stars Betelgeuse (α Ori) and Antares (α Sco) using near infrared interferometry. We have been monitoring the photosphere of Betelgeuse with the VLTI/PIONIER instrument for three years. On Antares, we obtained an unprecedented sampling of the visibility function. These data allow us to probe the convective photosphere of massive evolved stars.

Domaines: Astrophysique stellaire et solaire [astro-ph.SR]

M. Montargès, P. Kervella, G. Perrin, A. Chiavassa, M. Aurière. The Convection of Close Red Supergiant Stars Observed With Near-Infrared Interferometry. The Physics of Evolved Stars: A Conference Dedicated to the Memory of Olivier Chesneau , Jun 2015, Nice, France. pp.243 - 247, ⟨10.1051/eas/1571054⟩. ⟨hal-01275353⟩