Spatially resolving the inhomogeneous structure of the dynamical atmosphere of Betelgeuse with VLTI/AMBER
@article{Ohnaka2009SpatiallyRT, title={Spatially resolving the inhomogeneous structure of the dynamical atmosphere of Betelgeuse with VLTI/AMBER}, author={Keiichi Ohnaka and K. H. Hofmann and Myriam Benisty and Alain E. Chelli and Thomas Driebe and F. Millour and Romain G. Petrov and Dieter Schertl and P. Stee and Farrokh Vakili and Gerd Weigelt}, journal={Astronomy and Astrophysics}, year={2009}, volume={503}, pages={183-195} }
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 aim is to probe inhomogeneous structures in the dynamical atmosphere of Betelgeuse. Methods. Betelgeuse was observed in the wavelength range between 2.28 and 2.31� m with VLTI/AMBER using baselines of 16, 32, and 48 m. The spectral resolutions of 4800‐12000 allow us to study inhomogeneities seen in…
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References
SHOWING 1-10 OF 66 REFERENCES
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…
VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000
- PhysicsAstronomical Telescopes + Instrumentation
- 2008
We present interferometric near-infrared observations of the Luminous Blue Variable (LBV) η Car using the Very Large Telescope Interferometer (VLTI) and the AMBER instrument of the European Southern…
New views of Betelgeuse: multi‐wavelength surface imaging and implications for models of hotspot generation
- Physics
- 2000
ABSTRA C T We report contemporaneous multi-wavelength interferometric imaging of the red supergiant star Betelgeuse (a Orionis), using the Cambridge Optical Aperture Synthesis Telescope (COAST) and…
Modeling the Variable Chromosphere of α Orionis
- Physics
- 2000
A spectral analysis of the prototypical red supergiant star a Ori that is based on near-UV, optical, and near-IR high-dispersion spectra obtained between 1992 September and 1999 July with the Space…
The molecular and dusty composition of Betelgeuse's inner circumstellar environment
- Physics
- 2007
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 the…
Study of molecular layers in the atmosphere of the supergiant star $\mu$ Cep by interferometry in the K band
- Physics
- 2005
Infrared interferometry of supergiant and Mira stars has recently been reinterpreted as revealing the presence of deep molecular layers. Empirical models for a photosphere surrounded by a simple…
Infrared Spectra and Visibilities as Probes of the Outer Atmospheres of Red Supergiant Stars
- Physics
- 2006
In the light of the recent results of the stellar interferometry, we examine the nature of the extra molecular layer outside the photosphere of red supergiant stars, so far studied mostly with the…
The outer atmosphere of the M-type supergiant α Orionis: K I 7699 Å emission
- Physics
- 2002
Spatially-resolved high-resolution long-slit spectra of Betelgeuse's circumstellar shell are described for a spectral window centered on the 7699 A resonance line of neutral potassium. The K i…
The surface structure and linib-darkening profile of Betelgeuse
- Physics
- 1997
We present the first resolved image of a star observed with a separated-element optical aperture synthesis telescope. Observations of the M2 lab supergiant Betelgeuse (a Orionis) were made at 830 nm…
Water Vapor on Betelgeuse as Revealed by TEXES
- Physics
- 2005
The outer atmosphere of the M supergiant Betelgeuse is puzzling. Published observations of different kinds have shed light on different aspects of the atmosphere, but no unified picture has emerged.…