Commission 45: Spectral Classification
Language
en
Communication dans un congrès
This item was published in
Proceedings of the International Astronomical Union - Transactions IAU, Volume 7, Issue T28, p. 190-195, 2012, Proceedings of the International Astronomical Union - Transactions IAU, Volume 7, Issue T28, p. 190-195, 2012, 2009, Rio de Janeiro. 2012-04, vol. 28, p. 190-195
English 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. ...Read more >
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.Read less <
Origin
Hal imported