Uniform Retrieval Analysis of Brown Dwarfs
- 1School of Earth & Space Exploration, Arizona State University, Tempe AZ 85287, USA
- 2Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- 3University of Texas at Austin, Department of Astronomy, 2515 Speedway C1400, Austin, TX 78712, USA
- 4NASA Ames Research Center, Mail Stop 245-3; Moffett Field, CA 94035, USA
Spectra of brown dwarfs are key to exploring the chemistry and physics that take place in their atmospheres. Late T dwarf (850 - 500 K) spectra are particularly diagnostic due to their relatively cloud free atmospheres and deep molecular bands. With the use of powerful atmospheric retrieval tools, these properties permit proper allocation of constraints on the molecular/atomic abundances and temperature profiles. These constraints can be used to derive the elemental abundances (metallicity, C/O), chemical disequilibrium, and non-radiative-convective equilibrium temperature perturbations. Building upon previous analyses on T and Y dwarfs (Line et al. 2017; Zalesky et al. 2019), we present a uniform retrieval analysis of 52 T dwarfs via their low-resolution near-infrared spectra. This analysis more than doubles the sample of T dwarfs with retrieved properties. We present updates on current compositional trends and thermal profile constraints amongst the T dwarf population.
How to cite: Saboi, K., Line, M. R., Zalesky, J., Schneider, A., Zhang, Z., Liu, M. C., Best, W. M. J., and Marley, M. S.: Uniform Retrieval Analysis of Brown Dwarfs, Europlanet Science Congress 2020, online, 21 September–9 Oct 2020, EPSC2020-573, https://doi.org/10.5194/epsc2020-573, 2020
