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Near-infrared spectroscopy of 133P/Elst-Pizarro |
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| Authors: | P Rousselot C Dumas |
| Institution: | a Université de Franche-Comté, Observatoire de Besançon, Institut UTINAM - UMR CNRS 6213, BP 1615, 25010 Besançon Cedex, France b European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19, Chile c LESIA, Observatoire de Paris, 92195 Meudon Principal Cedex, France |
| Abstract: | Comet 133P/Elst-Pizarro, known to be a main-belt asteroid with a cometary activity, was observed with the near-infrared integral field spectrograph SINFONI at the 8.2-m Very Large Telescope in J, H, and K bands during its 2007 perihelion passage. The goal of these observations was to attempt detection of water ice absorption bands. We present here the details of the data processing, the results of these observations, and our compositional modeling of the final spectrum. No water ice absorptions were detected within the noise of the spectrum but we show that this spectrum is compatible with a reasonable near-infrared albedo value of 7-10% and a mixture of water ice, black carbon, Tholin and silicates. This interpretation, nevertheless, is not unique. |
| Keywords: | Comets Comets nucleus Comets composition Ices IR spectroscopy |
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