How dusty is alpha Centauri? Excess or non-excess over the infrared photospheres of main-sequence stars

@article{Wiegert2014HowDI,
  title={How dusty is alpha Centauri? Excess or non-excess over the infrared photospheres of main-sequence stars},
  author={J. Wiegert and Ren{\'e} Liseau and Ph. Th'ebault and G{\"o}ran Olofsson and Andr{\'e} Mora and Geoffrey C. Bryden and Jonathan P. Marshall and Carlos Eiroa and Benjamı́n Montesinos and David R. Ardila and J. Ch. Augereau and A. Aran and William C. Danchi and Carlos del Burgo and Steve Ertel and Malcolm Fridlund and Mitra Hajigholi and Alexander V. Krivov and G{\"o}ran Pilbratt and Aki Roberge and Glenn J. White and S. Earth and Space Sciences and Chalmers University of Technology and Sweden. and Observatoire de Paris and Laboratoire d''etudes spatiales et d'instrumentation en astrophysique and France. and Department of Astronomy and Stockholm University and Esa - Esac Gaia SOC. P.O. and Spain. and Jet Propulsion Laboratory and Usa and Departamento de F'isica Te'orica and C-XI and Facultad de Ciencias and Universidad Aut'onoma de Madrid and Departamento de Astrof'isica and Centro de Astrobiolog'ia and Nasa Herschel Science Center and Infrared Processing and Analysis Center and California Institute of Technology Herschel Science Center and European Space Agency and European Space Astronomy Centre and 1 UJF-Grenoble and CNRS-INSU and Institut de Plan'etologie et d'Astrophysique de Grenoble and European Southern Observatory and Chile. and Max-Planck-Institut fur Astronomie and H Germany and Astrophysics Science Division and Nasa Goddard Space Flight Center and Instituto Nacional de Astrof'isica and 'optica y Electr'onica and M'exico. and Institute of planetary Research and German Aerospace Center and Leiden Observatory and University of Leiden and The Netherlands. and Astrophysikalisches Institut und Universitatssternwarte and Friedrich-Schiller-Universitat Jena and Astrophysics Mission Division and Research and Scientific Support Department Esa and Exoplanets and Stellar Astrophysics Laboratory and Dept. of PhysicsAstronomy and UK TheOpenUniversity and Space ScienceTechnology Department and Cclrc Rutherford Appleton Laboratory and UK. and Institute for Particle Physics and Astrophysics and University of Kiel},
  journal={Astronomy and Astrophysics},
  year={2014},
  volume={563}
}
Context. Debris discs around main-sequence stars indicate the presence of larger rocky bodies. The components of the nearby, solar-type binary alpha Centauri have metallicities that are higher than solar, which is thought to promote giant planet formation. Aims. We aim to determine the level of emission from debris around the stars in the alpha Cen system. This requires knowledge of their photospheres. Having already detected the temperature minimum, Tmin , of alpha Cen A at far-infrared… 

ALMA observations of α Centauri - First detection of main-sequence stars at 3 mm wavelength

Context. The precise mechanisms that provide the non-radiative energy for heating the chromosphere and the corona of the Sun and those of other stars constitute an active field of research. By

Imaging low-mass planets within the habitable zone of α Centauri

Sensitivity to warm sub-Neptune-sized planets throughout much of the habitable zone of α Centauri A is demonstrated, an order of magnitude more sensitive than state-of-the-art exoplanet imaging mass detection limits.

Searching for Planets Orbiting α Cen A with the James Webb Space Telescope

α Centauri A is the closest solar-type star to the Sun and offers an excellent opportunity to detect the thermal emission of a mature planet heated by its host star. The MIRI coronagraph on the James

The chemical composition of α Centauri AB revisited

  • T. Morel
  • Physics, Geology
    Astronomy & Astrophysics
  • 2018
The two solar-like stars α Cen A and B have long served as cornerstones for stellar physics in virtue of their immediate proximity, association in a visual binary, and masses that bracket that of the

THE INNER DEBRIS STRUCTURE IN THE FOMALHAUT PLANETARY SYSTEM

Fomalhaut plays an important role in the study of debris disks and small bodies in other planetary systems. The proximity and luminosity of the star make key features of its debris, like the water

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Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their solar system's counterparts are the asteroid and Edgeworth-Kuiper belts.

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94 Ceti is a triple star system with a circumprimary gas giant planet and far-infrared excess. Such excesses around main sequence stars are likely due to debris discs, and are considered as signposts

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Several mission concepts are being studied to directly image planets around nearby stars. It is commonly thought that directly imaging a potentially habitable exoplanet around a Sun-like star

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We show preliminary laboratory results advancing the technology readiness of a method to directly image planets and disks in multi-star systems such as Alpha Centauri. This method works with almost

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The Cen AB system represents a particularly attractive target for missions to directly image exoplanets. A potentially habitable planet can in theory be imaged in the system with a telescope as

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