Cited by 411Astrophysics and Star Formation StudiesStellar, planetary, and galactic studiesAstro and Planetary Science

A planetary system as the origin of structure in Fomalhaut's dust belt

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Kalas, Paul, Graham, James R., Clampin, Mark·2005·Nature

Abstract

The Sun and >15 per cent of nearby stars are surrounded by dusty disks that must be collisionally replenished by asteroids and comets, as the dust would otherwise be depleted on timescales <10(7) years (ref. 1). Theoretical studies show that the structure of a dusty disk can be modified by the gravitational influence of planets, but the observational evidence is incomplete, at least in part because maps of the thermal infrared emission from the disks have low linear resolution (35 au in the best case). Optical images provide higher resolution, but the closest examples (AU Mic and beta Pic) are edge-on, preventing the direct measurement of the azimuthal and radial disk structure that is required for fitting theoretical models of planetary perturbations. Here we report the detection of optical light reflected from the dust grains orbiting Fomalhaut (HD 216956). The system is inclined 24 degrees away from edge-on, enabling the measurement of disk structure around its entire circumference, at a linear resolution of 0.5 au. The dust is distributed in a belt 25 au wide, with a very sharp inner edge at a radial distance of 133 au, and we measure an offset of 15 au between the belt's geometric centre and Fomalhaut. Taken together, the sharp inner edge and offset demonstrate the presence of planetary-mass objects orbiting Fomalhaut.

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  • Forward scattering is seen and modelled in Fomalhaut's debris disc and in the light curve of disintegrating exoplanet KIC 12557548 b.

    “Such forward scattering is seen and modelled in Fomalhaut's debris disc (Kalas, Graham & Clampin 2005) and in the light curve produced by a disintegrating exoplanet KIC 12557548 b (Brogi et al. 2012;Rappaport et al. 2012).”

    From Analysis of 1SWASP J140747.93−394542.6 eclipse fine-structure: hints of exomoons (2014) · cites this paper as Kalas, Graham & Clampin 2005

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1 of the 31 references couldn’t be matched to a known paper.

Research works printed but not linked: 2

  1. [1]1. Backman, D. E. &amp; Paresce, F. in Protostars and Protoplanets III (eds Levy, E. H. &amp; Lunine, J. I.) p. 1253-1304 (Univ. Arizona Press, Tucson, 1993).
  2. [4]4. Ozernoy, L. M., Gorkavyi, N. N., Mather, J. C. &amp; Taidakova, T. A. Signatures of extrasolar planets on dust debris disks. Astrophys. J. 537, L147 (2000).

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Authors
Kalas, P., Graham, J. R., & Clampin, M.
Affiliations
  • University of California, Berkeley (US)
  • Goddard Space Flight Center (US)
Corresponding author
Kalas, Paul
Venue
Nature
Published
2005-06
Volume
435
Issue
7045
Pages
1067-1070
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2100118938
Cited by
411
References
31
Citations by year
2026: 9 · 2025: 8 · 2024: 10 · 2023: 12 · 2022: 7 · 2021: 14 · 2020: 12 · 2019: 10 · 2018: 13 · 2017: 20 · 2016: 23 · 2015: 29 · 2014: 40 · 2013: 42 · 2012: 35
FWCI
12.59
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
Keywords
Fomalhaut, debris disks, circumstellar dust, planetary perturbations, disk structure, inner disk edge, planet formation, planetary-mass objects

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