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      Debris Disks: Structure, Composition, and Variability

      1 , 2 , 3 , 4 , 5
      Annual Review of Astronomy and Astrophysics
      Annual Reviews

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          Abstract

          Debris disks are tenuous, dust-dominated disks commonly observed around stars over a wide range of ages. Those around main sequence stars are analogous to the Solar System's Kuiper Belt and zodiacal light. The dust in debris disks is believed to be continuously regenerated, originating primarily with collisions of planetesimals. Observations of debris disks provide insight into the evolution of planetary systems; and the composition of dust, comets, and planetesimals outside the Solar System; as well as placing constraints on the orbital architecture and potentially the masses of exoplanets that are not otherwise detectable. This review highlights recent advances in multiwavelength, high-resolution scattered light and thermal imaging that have revealed a complex and intricate diversity of structures in debris disks and discusses how modeling methods are evolving with the breadth and depth of the available observations. Two rapidly advancing subfields highlighted in this review include observations of atomic and molecular gas around main sequence stars and variations in emission from debris disks on very short (days to years) timescales, providing evidence of non-steady-state collisional evolution particularly in young debris disks.

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          Diffuse radiation in the Galaxy

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            Collisional model of asteroids and their debris

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                Author and article information

                Journal
                Annual Review of Astronomy and Astrophysics
                Annu. Rev. Astron. Astrophys.
                Annual Reviews
                0066-4146
                1545-4282
                September 14 2018
                September 14 2018
                : 56
                : 1
                : 541-591
                Affiliations
                [1 ]Department of Astronomy, Van Vleck Observatory, Wesleyan University, Middletown, Connecticut 06459, USA;
                [2 ]Astronomy Department, University of California, Berkeley, California 94720-3411, USA
                [3 ]Université Grenoble Alpes, CNRS, Institut d'Astrophysique et de Planétologie de Grenoble, 38000 Grenoble, France
                [4 ]Herzberg Astronomy & Astrophysics Programs, National Research Council of Canada, Victoria, British Columbia V9E 2E7, Canada
                [5 ]Department of Physics & Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
                Article
                10.1146/annurev-astro-081817-052035
                4409ee8c-d78a-43f6-bada-afb5c22d179b
                © 2018
                History

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