Infrared atomic oscillator strengths for the study of brown dwarfs and extra solar planets

Details Infrared atomic oscillator strengths for the study of brown dwarfs and extra solar planets Infrared atomic oscillator strengths for the study of brown dwarfs and extra solar planets

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jphcs.130a2002b&link_type=abstract

Journal of Physics: Conference Series, Volume 130, Issue 1, pp. 012002 (2008).

Physics

2

Scientific paper

The spectral opacity of cool dwarf stars, brown dwarfs and extra solar planets peaks at infrared (IR) wavelengths and is dominated by neutral atoms and molecules. However, the laboratory database for atomic oscillator strengths is not complete and lacks experimental data, which is a source of uncertainty for atmospheric models of sub-solar objects. The aim of our new laboratory studies is to determine accurate absolute oscillator strengths and apply them to the study of sub-solar mass objects. Our technique uses high-resolution Fourier transform spectroscopy to measure accurate branching fractions for atomic transitions, which are combined with measured radiative level lifetimes to yield oscillator strengths. We discuss the status of the IR laboratory atomic database and our measurements for neutral species in the visible and IR.

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