Methane in Plutoid Atmospheres: Update on Pluto and Upper Limits on Eris and Makemake

Details Methane in Plutoid Atmospheres: Update on Pluto and Upper Limits on Eris and Makemake Methane in Plutoid Atmospheres: Update on Pluto and Upper Limits on Eris and Makemake

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.3604r&link_type=abstract

American Astronomical Society, DPS meeting #40, #36.04; Bulletin of the American Astronomical Society, Vol. 40, p.461

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We have obtained high-resolution (R=25,000) near-infrared spectroscopy of the 1.66 micron 2nu3 band of methane on Pluto, Eris, and Makemake. Atmospheric methane is strongly detected in the Pluto spectra and not detected in the spectra of Eris and Makemake. The spectrum of Pluto is poorly fit by a single layer radiative transfer model where all the methane is at a single temperature. Greatly improved fits can be obtained with a two-layer model, with one warmer (T 100K) layer and one cooler (T 50K) layer. We will present these new fits to the Pluto spectrum as well as upper limits on the column abundance of methane in any atmospheres around Eris and Makemake.

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