Commission 45: Spectral Classification

Richard O. Gray Birgitta Nordström Sunetra Giridhar Adam J. Burgasser Laurent Eyer Ranjan Gupta 1 Margaret M. Hanson Michael J. Irwin C. Soubiran 2
2 M2A 2012
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : This report gives an update on developments since the last General Assembly in Rio de Janeiro. Classification - both photometric and spectral - continues to play a vital role in stellar astrophysics and stellar surveys. During the past three years, rapid progress has been made in the classification of brown dwarfs, with the discovery of the first Y dwarfs and the introduction of a near-IR classification system for M- and L-dwarfs. The number of known L-dwarfs now exceeds 1000, and so peculiar types are beginning to show up. For instance, there is now enough material to define a low-gravity spectral sequence for the L0 - L5 dwarfs. In addition, a number of unusally blue L-dwarfs are now known. Large-area surveys, always of interest to Commission 45, have proliferated during this period, including RAVE, SEGUE, and WISE with many more in the planning stages.
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Contributeur : Marie-Paule Pomies <>
Soumis le : jeudi 19 avril 2012 - 07:54:12
Dernière modification le : mardi 29 mai 2018 - 12:51:07

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Richard O. Gray, Birgitta Nordström, Sunetra Giridhar, Adam J. Burgasser, Laurent Eyer, et al.. Commission 45: Spectral Classification. IAU Commission 45 business meeting, 2009, Rio de Janeiro, Brazil. 28, pp.190-195, 2012, 〈10.1017/S1743921312002785〉. 〈hal-00688947〉



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