Spectroscopic observations of large TNOs with the ESO-VLT

Details Spectroscopic observations of large TNOs with the ESO-VLT Spectroscopic observations of large TNOs with the ESO-VLT

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007epsc.conf..658d&link_type=abstract

European Planetary Science Congress 2007, Proceedings of a conference held 20-24 August, 2007 in Potsdam, Germany. Online at ht

Computer Science

Scientific paper

We observed three large TNOs, Eris, 136108 (2003 EL61), and Orcus, using the new integral field spectrometer SINFONI at the European Southern Observatory - Very Large Telescope (ESO-VLT) in the H and K spectral regions. Some complementary spectroscopic data were obtained with FORS (visible) and ISAAC (J-band) at the VLT, as well as with EMMI (visible) at the ESO-NTT. The high quality of the SINFONI spectra and modelling of all available spectroscopic data combined together provide new information on the surface composition and properties of the three objects, in particular the state of mixing of the methane (pure or diluted in N2) on the dwarf planet Eris and the phase and temperature of water ice on Orcus and 2003 EL61. Results of these observations will be presented. Implications concerning the dominant endogenous/exogenous processes at the surface of these large TNOs will also be discussed.

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