Status of the physics of substellar objects

Details Status of the physics of substellar objects Status of the physics of substellar objects

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005an....326..920j&link_type=abstract

Astronomische Nachrichten, Vol.326, Issue 10, p.920-924

Astronomy and Astrophysics

Astrophysics

4

Stars: Structure, Planets: Extrasolar

Scientific paper

A full understanding of the properties of substellar objects is one of the major challenges facing astrophysics. Since their discovery in 1995, we have discovered hundreds of brown dwarfs and extrasolar planets. While these discoveries have enabled important comparisons with theory, observational progress has been much more rapid than the theoretical understanding of cool atmospheres. The reliable determination of mass, abundances, gravities and temperatures is not yet possible. The key problem is that substellar objects emit their observable radiation in the infrared region of the spectrum where our knowledge of atomic, molecular and line broadening data is poor. Here we report on the status of PoSSO (Physics of SubStellar Objects). In order to understand brown dwarfs and extrasolar planets increasing more like those in our solar system, we are studying a wide range of processes. Here we give an update on the project and sketch an outline of atoms, molecules and processes requiring study.

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