Commission 45: Spectral Classification - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Commission 45: Spectral Classification

Richard O. Gray
  • Fonction : Auteur
Birgitta Nordström
  • Fonction : Auteur
Sunetra Giridhar
  • Fonction : Auteur
Adam J. Burgasser
  • Fonction : Auteur
Laurent Eyer
  • Fonction : Auteur
Margaret M. Hanson
  • Fonction : Auteur
Michael J. Irwin
  • Fonction : Auteur
C. Soubiran

Résumé

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.

Dates et versions

hal-00688947 , version 1 (19-04-2012)

Identifiants

Citer

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. pp.190-195, ⟨10.1017/S1743921312002785⟩. ⟨hal-00688947⟩

Collections

INSU CNRS L3AB
69 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More