# The close circumstellar environment of Betelgeuse - IV. VLTI/PIONIER interferometric monitoring of the photosphere

@article{Montargs2016TheCC,
title={The close circumstellar environment of Betelgeuse - IV. VLTI/PIONIER interferometric monitoring of the photosphere},
author={Miguel Montarg{\e}s and Pierre Kervella and Guy Perrin and Andrea Chiavassa and J.-B. Le Bouquin and Michel Auri{\e}re and A. L'opez-Ariste and Ph. Mathias and Stephen T. Ridgway and Sylvestre Lacour and X. Haubois and J. P. Berger},
journal={Astronomy and Astrophysics},
year={2016},
volume={588}
}
• Published 16 February 2016
• Physics
• Astronomy and Astrophysics
Context. The mass-loss mechanism of cool massive evolved stars is poorly understood. The proximity of Betelgeuse makes it an appealing target to study its atmosphere, map the shape of its envelope, and follow the structure of its wind from the photosphere out to the interstellar medium. Aims. A link is suspected between the powerful convective motions in Betelgeuse and its mass loss. We aim to constrain the spatial structure and temporal evolution of the convective pattern on the photosphere…
28 Citations

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## References

SHOWING 1-10 OF 44 REFERENCES
The close circumstellar environment of Betelgeuse - III. SPHERE/ZIMPOL imaging polarimetry in the visible
• Physics, Geology
• 2016
Context. Mass-loss occurring in red supergiants (RSGs) is a major contributor to the enrichment of the interstellar medium in dust and molecules. The physical mechanism of this mass loss is however
The Close Circumstellar Environment of Betelgeuse: Adaptive Optics Spectro-imaging in the Near-IR with VLT/NACO
• Physics
• 2009
Context. Betelgeuse is one the largest stars in the sky in terms of angular diameter. Structures on the stellar photosphere have been detected in the visible and near-infrared as well as a compact
The close circumstellar environment of Betelgeuse - II. Diffraction-limited spectro-imaging from 7.76 to 19.50 μm with VLT/VISIR
• Physics, Geology
• 2011
Context. Mass-loss occurring in red supergiants (RSGs) is a major contributor to the enrichment of the interstellar medium in dust and molecules. The physical mechanism of this mass loss is however
Radiative hydrodynamics simulations of red supergiant stars - II. Simulations of convection on Betelgeuse match interferometric observations
• Physics
• 2010
Context. The red supergiant (RSG) Betelgeuse is an irregular variable star. Convection may play an important role in understanding this variability. Interferometric observations can be interpreted
Radiative hydrodynamics simulations of red supergiant stars - I. interpretation of interferometric observations
• Physics
• 2009
Context. It has been proposed that convection in red supergiant (RSG) stars produces large-scale granules causing observable surface inhomogeneities. This convection is also extremely vigorous and is
Spatially Resolved Hubble Space Telescope Spectra of the Chromosphere of α Orionis
• Physics
• 1998
Spatially resolved UV spectra of the supergiant α Orionis (Betelgeuse) obtained in 1995 March with the Goddard High Resolution Spectrograph (GHRS) on board the Hubble Space Telescope (HST) show that
Spatially resolving the inhomogeneous structure of the dynamical atmosphere of Betelgeuse with VLTI/AMBER
• Physics
• 2009
Context. Aims. We present spatially resolved high-spectral resolution K-band observations of the red supergiant Betelgeuse (α Ori) using AMBER at the Very Large Telescope Interferometer (VLTI). Our
Radiative hydrodynamic simulations of red supergiant stars - III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements
• Physics
• 2011
Context. It has been shown that convection in red supergiant stars (RSG) gives rise to large granules that cause surface inhomogeneities and shock waves in the photosphere. The resulting motion of
The magnetic field of Betelgeuse: a local dynamo from giant convection cells?
• Physics, Geology
• 2010
Context. Betelgeuse is an M supergiant with a complex and extended atmosphere, which also harbors spots and giant granules at its surface. A possible magnetic field could contribute to the mass loss
THE NON-UNIFORM, DYNAMIC ATMOSPHERE OF BETELGEUSE OBSERVED AT MID-INFRARED WAVELENGTHS
• Physics
• 2011
We present an interferometric study of the continuum surface of the red supergiant star Betelgeuse at 11.15 μm wavelength, using data obtained with the Berkeley Infrared Spatial Interferometer each