Physics
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phdt.........1a&link_type=abstract
PhD Thesis
Physics
Asteroids, Tnos, Comets, Solar System, Photometry, Spectroscopy
Scientific paper
In this work we studied different populations of minor bodies of the Solar System in order to obtain a better understanding of their physical properties and the interrelations between them.
In first place, we studied the rotational properties of asteroids members of the Themis, Eos and Maria dynamical families. The results show that there exists a correlation between the rotational frequency and the diameter of the objects for the Themis and Maria family members. From the comparison of the distributions of rotational frequencies of the families, we obtained that Themis and Maria have the lowest and highest mean frequency, respectively. We also performed a spectroscopic and dynamical analysis of the inner region on the Main Belt. The results show that there exists a complicated web of resonances which probably shapes the observed compositional distribution along this region.
Concerning transitional objects, we performed studies on asteroids in cometary orbits and Jupiter family comets. We obtained that two sub-populations of asteroids in cometary orbits can have different sources. The NEOs, with perihelion distance lower than 1.3 AU, seem to come from the Main Belt while the non-NEOs from the Jupiter family comets.
Finally, we performed two studies on trans-Neptunian objects. In the first we measured the radius of Charon from a stellar ocucltation. The obtained radius was of 603:6 pm 1:4 km. In the second study we observed the trans-Neptunian object (59358) 1999 CL158 searching for evidence of a recent collision. On its near-infrared spectrum we found an absorption feature possibly due to methane ice on the surface of the object. This feature is interpreted as evidence of a recent collisional event.
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