The close circumstellar environment of Betelgeuse - II. Diffraction-limited spectro-imaging from 7.76 to 19.50 μm with VLT/VISIR

@article{Kervella2011TheCC,
  title={The close circumstellar environment of Betelgeuse - II. Diffraction-limited spectro-imaging from 7.76 to 19.50 $\mu$m with VLT/VISIR},
  author={P. Kervella and G. Perrin and A. Chiavassa and S. Ridgway and J. Cami and X. Haubois and T. Verhoelst},
  journal={Astronomy and Astrophysics},
  year={2011},
  volume={531}
}
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 relatively poorly known. Betelgeuse is the nearest RSG, and as such a prime object for high angular resolution observations of its surface (by interferometry) and close circumstellar environment. Aims. The goal of our program is to understand how the material expelled from Betelgeuse is transported… Expand
The close circumstellar environment of Betelgeuse - III. SPHERE/ZIMPOL imaging polarimetry in the visible
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 howeverExpand
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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,Expand
Towards a coherent view at infrared wavelengths of mass loss in Betelgeuse
The violent convective motions, low surface gravity, and high brightness of red supergiants combine to trigger an intense stellar wind. As the distance from the star increases, the standard scenarioExpand
The enigmatic nature of the circumstellar envelope and bow shock surrounding Betelgeuse as revealed by Herschel - I. Evidence of clumps, multiple arcs, and a linear bar-like structure
Context. The interaction between stellar winds and the interstellar medium (ISM) can create complex bow shocks. The photometers on board the Herschel Space Observatory are ideally suited to studyingExpand
The inner circumstellar dust of the red supergiant Antares as seen with VLT/SPHERE/ZIMPOL
The processes by which red supergiants lose mass are not fully understood thus-far and their mass-loss rates lack theoretical constraints. The ambient surroundings of the nearby M0.5 Iab star AntaresExpand
Asphericity, Interaction, and Dust in the Type II-P/II-L Supernova 2013EJ in Messier 74
SN 2013ej is a well-studied core-collapse supernova (SN) that stemmed from a directly identified red supergiant (RSG) progenitor in galaxy M74. The source exhibits signs of substantial geometricExpand
Properties of the CO and H$_2$O MOLsphere of the red supergiant Betelgeuse from VLTI/AMBER observations
Context. Betelgeuse is the closest red supergiant (RSG), therefore it is well suited to study the complex processes in its atmosphere that lead to the chemical enrichment of the interstellar medium.Expand
NOEMA maps the CO J = 2 − 1 environment of the red supergiant μ Cep
Red supergiant stars are surrounded by a gaseous and dusty circumstellar environment created by their mass loss which spreads heavy elements into the interstellar medium. The structure and theExpand
The enigmatic nature of the circumstellar envelope and bow shock surrounding Betelgeuse as revealed by Herschel
The interaction between stellar winds and the interstellar medium (ISM) can create complex bow shocks. We have studied the bow shock region around Betelgeuse using Herschel PACS images at 70, 100,Expand
Dust in the Wolf–Rayet nebula M 1-67
The Wolf-Rayet nebula M1-67 around WR124 is located above the Galactic plane in a region mostly empty of interstellar medium, which makes it the perfect target to study the mass-loss episodesExpand
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References

SHOWING 1-10 OF 52 REFERENCES
The Close Circumstellar Environment of Betelgeuse: Adaptive Optics Spectro-imaging in the Near-IR with VLT/NACO
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 compactExpand
The molecular and dusty composition of Betelgeuse's inner circumstellar environment
Context. The study of the atmosphere of red supergiant stars in general and of Betelgeuse (α Orionis) in particular is of prime importance to understand dust formation and how mass is lost to theExpand
HD 97048: a closer look at the disk
Aims.Large ground-based instruments, like VISIR on the VLT, providing diffraction-limited (~0.3 arcsec) images in the mid-infrared where strong PAH features appear, enable us to see the flaringExpand
Spatially resolving the inhomogeneous structure of the dynamical atmosphere of Betelgeuse with VLTI/AMBER
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). OurExpand
The environment of the fast rotating star Achernar. High-resolution thermal infrared imaging with VI
Context: The geometry of the circumstellar envelopes (CSE) surrounding Be stars is still uncertain, although it is often assumed that they are formed by a disk around the stellar equator and a hotExpand
Imaging the dynamical atmosphere of the red supergiant Betelgeuse in the CO first overtone lines with VLTI/AMBER ,
Aims. We present one-dimensional aperture synthesis imaging of the red supergiant Betelgeuse (α Ori) with VLTI/AMBER. We reconstructed for the first time one-dimensional images in the individual COExpand
Texes Observations of M Supergiants: Dynamics and Thermodynamics of Wind Acceleration
We have detected [Fe II] 17.94 μm and 24.52 μm emission from a sample of M supergiants (μ Cep, α Sco, α Ori, CE Tau, AD Per, and α Her) using the Texas Echelon Cross Echelle Spectrograph on NASA'sExpand
Circumstellar environments — V. The asymmetric chromosphere and dust shell of a Orionis
We report new mid-infrared and radio images of the M supergiant (X Orionis. The radio images, taken with MERLIN! and the Very Large Array, resolve the chromosphere of the star at a wavelength of 6Expand
First Image of the Surface of a Star with the Hubble Space Telescope
A direct image of the surface of a star, Betelgeuse (=α Ori; M2 Iab), has been obtained with the Faint Object Camera on the Hubble Space Telescope. Images in two ~300 A-wide bands centered at 2550Expand
Imaging circumstellar environments with a nulling interferometer
Extrasolar planets must be imaged directly if their nature is to be better understood. But this will be difficult, as the bright light from the parent star (or rather its diffracted halo in theExpand
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