The limb-darkened Arcturus: imaging with the IOTA/IONIC interferometer

@article{Lacour2008TheLA,
  title={The limb-darkened Arcturus: imaging with the IOTA/IONIC interferometer},
  author={Sylvestre Lacour and Serge Meimon and {\'E}ric Thi{\'e}baut and Guy Perrin and Tijl Verhoelst and Ettore Pedretti and Peter A. Schuller and Laurent M. Mugnier and John D. Monnier and J-P. Berger and X. Haubois and A. Poncelet and Guy Le Besnerais and Kjell Eriksson and Rafael Millan-Gabet and Marc G. Lacasse and Wesley A. Traub},
  journal={Astronomy and Astrophysics},
  year={2008},
  volume={485},
  pages={561-570}
}
Aims. We undertook an H band interferometric examination of Arcturus, a star frequently used as a spatial and spectral calibrator. Methods. Using the IOTA 3 telescope interferometer, we performed spectro-interferometric observations (R ≈ 35) of Arcturus. Atmospheric models and prescriptions were fitted to the data to derive the brightness distribution of the photosphere. Image reconstruction was performed using two software algorithms: Wisard and Mira. Results. An achromatic power law… Expand
Imaging the spotty surface of Betelgeuse in the H band
Aims. This paper reports on H-band interferometric observations of Betelgeuse made at the three-telescope interferometer IOTA. We image Betelgeuse and its asymmetries to understand the spatialExpand
The Pulsation of χ Cygni Imaged by Optical Interferometry: A Novel Technique to Derive Distance and Mass of Mira Stars
We present infrared interferometric imaging of the S-type Mira star χ Cygni. The object was observed at four different epochs in 2005-2006 with the Infrared-Optical Telescope Array opticalExpand
Hot exozodiacal dust resolved around Vega with IOTA/IONIC
Context. Although debris discs have been detected around a significant number of main-sequence stars, only a few of them are known to harbour hot dust in their inner part where terrestrial planetsExpand
Milli-arcsecond images of the Herbig Ae star HD 163296
Context. The very close environments of young stars are the hosts of fundamental physical processes, such as planet formation, stardisk interactions, mass accretion, and ejection. The complexExpand
HIGH-CONTRAST STELLAR OBSERVATIONS WITHIN THE DIFFRACTION LIMIT AT THE PALOMAR HALE TELESCOPE
We report on high-accuracy high-resolution (<20 mas) stellar observations obtained with the Palomar Fiber Nuller (PFN), a near-infrared (2.2 μm) interferometric coronagraph installed at the PalomarExpand
The radii and limb darkenings of α Centauri A and B . Interferometric measurements with VLTI/PIONIER
The photospheric radius is one of the fundamental parameters governing the radiative equilibrium of a star. We report new observations of the nearest solar-type stars α  Centauri A (G2V) and B (K1V)Expand
FUNDAMENTAL PARAMETERS AND CHEMICAL COMPOSITION OF ARCTURUS
We derive a self-consistent set of atmospheric parameters and abundances of 17 elements for the red giant star Arcturus: T eff = 4286 ± 30 K, log g = 1.66 ± 0.05, and [Fe/H] = –0.52 ± 0.04. TheExpand
Transiting exoplanets and magnetic spots characterized with optical interferometry
Stellar activity causes difficulties in the characterization of transiting exoplanets. Studies have been performed to quantify its impact on infrared interferometry, but not in the visible domain,Expand
Imaging with the VLTI
PHASE REFERENCING AND IMAGE RECONSTRUCTION are two fundamental areas for the scientific success of optical interferometry. This is attested by the effort in building instruments such as PIONIER,Expand
Detection of non‐radial pulsation and faint companion in the symbiotic star CH Cyg
We have detected asymmetry in the symbiotic star CH Cyg through the measurement of precision closure phase with the Integrated Optics Near-Infrared Camera (IONIC) beam combiner, at the infraredExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 48 REFERENCES
New views of Betelgeuse: multi‐wavelength surface imaging and implications for models of hotspot generation
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) andExpand
Near- and mid-infrared subarcsecond structure of the dusty symbiotic star R Aquarii
The results of a high-resolution interferometric campaign targeting the symbiotic long-period variable (LPV) R Aqr are reported. With both near-infrared measurements on baselines out to 10 m andExpand
Detection of Water Vapor in the Photosphere of Arcturus
We report detections of pure rotation lines of OH and H2O in the K1.5 III red-giant star Arcturus (α Bootis) using high-resolution, infrared spectra covering the regions 806 −822cm −1 (12.2 −12.4 µm)Expand
Unveiling Mira stars behind the molecules - Confirmation of the molecular layer model with narrow band near-infrared interferometry
We have observed Mira stars with the FLUOR beamcombiner on the IOTA interferometer in narrow bands around $2.2\,\mu$m wavelength. We find systematically larger diameters in bands contaminated byExpand
INFRARED ATLAS OF THE ARCTURUS SPECTRUM, 0.9-5.3 MICRONS
A spectral atlas of the infrared spectrum of the bright K 2 giant Arcturus has been completed using the 4 meter Mayall telescope and FTS. The 0.9-5.3 micron spectrum of Arcturus was observed at highExpand
Long‐Term Spectroscopic and Precise Radial Velocity Monitoring of Arcturus
This dissertation presents an analysis of data obtained from long-term spectroscopic monitoring of the bright, nearby K giant star Arcturus (a Bootis, K1.5 III, HR 5340, HD 124897), conducted usingExpand
The Effective Temperature of Arcturus
We construct an empirical energy distribution for Arcturus from published scans, integrate it to obtain the total flux, and combine the latter with precise interferometric measurements of theExpand
Deriving object visibilities from interferograms obtained with a fiber stellar interferometer
A method is given for extracting object visibilities from data provided by a long baseline interferometer, where the beams are spatially filtered by single-mode fibers and interferograms are obtainedExpand
ISO-SWS calibration and the accurate modelling of cool-star atmospheres - III. A0 to G2 stars
Vega, Sirius, Beta Leo, Alpha Car and Alpha Cen A belong to a sample of twenty stellar sources used for the calibration of the detectors of the Short-Wavelength Spectrometer on board the InfraredExpand
A catalogue of calibrator stars for long baseline stellar interferometry
Long baseline stellar interferometry shares with other techniques the need for calibrator stars in order to correct for instrumental and atmospheric eects. We present a catalogue of 374 starsExpand
...
1
2
3
4
5
...