A close halo of large transparent grains around extreme red giant stars

Barnaby R. M. Norris (), Peter G. Tuthill, Michael J. Ireland, Sylvestre Lacour, Albert A. Zijlstra, Foteini Lykou, Thomas M. Evans, Paul Stewart and Timothy R. Bedding
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Barnaby R. M. Norris: Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia
Peter G. Tuthill: Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia
Michael J. Ireland: Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia
Sylvestre Lacour: LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, Meudon 92190, France
Albert A. Zijlstra: Jodrell Bank Centre for Astrophysics, School of Physics & Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Foteini Lykou: Jodrell Bank Centre for Astrophysics, School of Physics & Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Thomas M. Evans: Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia
Paul Stewart: Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia
Timothy R. Bedding: Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Australia

Nature, 2012, vol. 484, issue 7393, 220-222

Abstract: The dust shells of three intermediate-mass stars are observed to lie remarkably close to the photosphere and to be composed of unexpectedly large grains, consistent with mass loss from such stars occurring by means of ejection of this dust by photon scattering rather than as a result of radiation pressure.

Date: 2012
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DOI: 10.1038/nature10935

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