Volume 582, October 2015
|Number of page(s)||6|
|Section||Planets and planetary systems|
|Published online||29 September 2015|
TNO (278361) 2007 JJ43 observed with X-Shooter
Observatorio Nacional, COAA,
Rua General Jose Cristino 77,
Rio de Janeiro,
2 Observatoire de Paris-Meudon/LESIA, Meudon, 75014 Paris, France
3 Université Denis Diderot, Paris VII, 75013 Paris, France
Received: 3 March 2015
Accepted: 28 June 2015
Context. The trans-Neptunian region of the solar system is populated by a wide variety of icy bodies showing great diversity in orbital behavior, size, surface color, and composition.
Aims. We present new ultraviolet, visible and near-infrared spectroscopic measurements for the trans-Neptunian object (278361) 2007 JJ43, which is a dwarf planet candidate.
Methods. The observations were performed with the instrument X-Shooter for the 8.2 m ESO Very Large Telescope mounted on the UT2 at the Paranal Observatory in Chile. This spectrograph covers the entire 300–2480 nm spectral range at once with a high resolving power. We analyzed the surface composition by modeling the spectra in the complete wavelength range and tried to detect icy compounds. We searched for spectral heterogeneity by comparing spectra obtained at different regions.
Results. The spectrum obtained is quite flat and 2007 JJ43 can be classified as a blue-red object. No absorption bands of icy elements were detected in the spectra. However, our models indicate that crystalline water ice is probably not present on the surface in more than a concentration of 6.5%. Observations covering about one-third of the entire surface do not present any differences, suggesting that the surface is apparently homogeneous.
Key words: Kuiper belt objects: individual: (278361) 2007 JJ43 / techniques: spectroscopic / instrumentation: spectrographs
© ESO, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.