Reference : A Search for Water Vaporization on Ceres
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/110942
A Search for Water Vaporization on Ceres
English
Rousselot, P. [Observatoire de Besançon, Institut UTINAM-UMR CNRS 6213, University of Franche-Comté, BP 1615, 25010 Besançon Cedex, France]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Manfroid, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)]
Mousis, O. [Observatoire de Besançon, Institut UTINAM-UMR CNRS 6213, University of Franche-Comté, BP 1615, 25010 Besançon Cedex, France]
Dumas, C. [European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19, Chile]
Carry, B. [European Space Astronomy Centre, ESA, P.O. Box 78, 28691 Villanueva de la Cañada, Madrid, Spain]
Marboeuf, U. [Institut de Planétologie et d'Astrophysique de Grenoble, Université Joseph Fourier, CNRS INSU, France]
Zucconi, J*-M [Observatoire de Besançon, Institut UTINAM-UMR CNRS 6213, University of Franche-Comté, BP 1615, 25010 Besançon Cedex, France ; Deceased.]
1-Oct-2011
Astronomical Journal (The)
Univ Chicago Press
142
125
Yes
International
0004-6256
Chicago
IL
[en] minor planets ; asteroids: individual: Ceres
[en] There are hints that the dwarf planet (1) Ceres may contain a large amount of water ice. Some models and previous observations suggest that ice could be close enough to the surface to create a flux of water outward through the regolith. This work aims to confirm a previous detection of OH emission off the northern limb of Ceres with the International Ultraviolet Explorer (IUE). Such emission would be evidence of water molecules escaping from the dwarf planet. We used the Ultraviolet and Visual Echelle Spectrograph of the Very Large Telescope to obtain spectra off the northern and southern limbs of Ceres at several epochs. These spectra cover the 307-312 nm wavelength range corresponding to the OH (0,0) emission band, which is the brightest band of this radical, well known in the cometary spectra. These new observations, five times more sensitive than those from IUE, did not permit detection of OH around Ceres. We derive an upper limit for the water production of about ~7 × 10[SUP]25[/SUP] molecules s[SUP]-1[/SUP] and estimate the minimum thickness of the dust surface layer above the water ice layer (if present) to be about 20 m. .
Researchers
http://hdl.handle.net/2268/110942
10.1088/0004-6256/142/4/125
http://adsabs.harvard.edu/abs/2011AJ....142..125R

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