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The science of brown dwarfs

Adam Burrows and James Liebert

Adam Burrows

  • Departments of Physics and Astronomy, University of Arizona, Tucson, Arizona 85721

James Liebert

  • Department of Astronomy and Steward Observatory, University of Arizona, Tucson, Arizona 85721

Rev. Mod. Phys. 65, 301 – Published 1 April, 1993

DOI: https://doi.org/10.1103/RevModPhys.65.301

Abstract

This review summarizes the current status of both brown dwarf theory and the searches for these elusive substellar objects. The conceptual continuity between the brown dwarf and the well-studied M dwarf branches is emphasized throughout. The physics of their atmospheres and interiors is reviewed and an analytic model of both brown dwarf evolution and the lower edge of the hydrogen main sequence is presented. An extensive discussion of brown dwarf searches in the field, in binaries, around white dwarfs, in clusters, in the solar neighborhood, in the galactic halo, and using proper-motion catalogs is provided, as is a tentative list of candidates in the field. The theory near and below the edge of the main sequence, while sophisticated, is only now being successfully challenged by optical and infrared observations. The near future promises a productive explosion in our knowledge of this problematic galactic population.

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