Reference : Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/212540
Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape and topographic features
English
Dias-Oliveira, A. [> >]
Sicardy, B. [> >]
Ortiz, J. L. [> >]
Braga-Ribas, F. [> >]
Leiva, R. [> >]
Vieira-Martins, R. [> >]
Benedetti-Rossi, G. [> >]
Camargo, J. I. B. [> >]
Assafin, M. [> >]
Gomes-Junior, A. R. [> >]
Baug, T. [> >]
Chandrasekhar, T. [> >]
Desmars, J. [> >]
Duffard, R. [> >]
Santos-Sanz, P. [> >]
Ergang, Z. [> >]
Ganesh, S. [> >]
Ikari, Y. [> >]
Irawati, P. [> >]
Jain, J. [> >]
Liying, Z. [> >]
Richichi, A. [> >]
Shengbang, Q. [> >]
Behrend, R. [> >]
Benkhaldoun, Z. [> >]
Brosch, N. [> >]
Daassou, A. [> >]
Frappa, E. [> >]
Gal-Yam, A. [> >]
Garcia-Lozano, R. [> >]
Gillon, Michaël [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Jehin, Emmanuel [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Kaspi, S. [> >]
Klotz, A. [> >]
Lecacheux, J. [> >]
Mahasena, P. [> >]
Manfroid, Jean [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Manulis, I. [> >]
Maury, A. [> >]
Mohan, V. [> >]
Morales, N. [> >]
Ofek, E. [> >]
Rinner, C. [> >]
Sharma, A. [> >]
Sposetti, S. [> >]
Tanga, P. [> >]
Thirouin, A. [> >]
Vachier, F. [> >]
Widemann, T. [> >]
Asai, A. [> >]
Watanabe, Hayato [> >]
Watanabe, Hiroyuki [> >]
Owada, M. [> >]
Yamamura, H. [> >]
Hayamizu, T. [> >]
Bradshaw, J. [> >]
Kerr, S. [> >]
Tomioka, H. [> >]
Andersson, S. [> >]
Dangl, G. [> >]
Haymes, T. [> >]
Naves, R. [> >]
Wortmann, G. [> >]
1-May-2017
The Astronomical Journal
154
1
13
Yes (verified by ORBi)
International
0004-6256
[en] Astrophysics - Earth and Planetary Astrophysics
[en] We present results derived from four stellar occultations by the plutino object (208996) 2003~AZ$_{84}$, detected at January 8, 2011 (single-chord event), February 3, 2012 (multi-chord), December 2, 2013 (single-chord) and November 15, 2014 (multi-chord). Our observations rule out an oblate spheroid solution for 2003~AZ$_{84}$'s shape. Instead, assuming hydrostatic equilibrium, we find that a Jacobi triaxial solution with semi axes $(470 \pm 20) \times (383 \pm 10) \times (245 \pm 8)$~km % axis ratios $b/a= 0.82 \pm 0.05$ and $c/a= 0.52 \pm 0.02$, can better account for all our occultation observations. Combining these dimensions with the rotation period of the body (6.75~h) and the amplitude of its rotation light curve, we derive a density $\rho=0.87 \pm 0.01$~g~cm$^{-3}$ a geometric albedo $p_V= 0.097 \pm 0.009$. A grazing chord observed during the 2014 occultation reveals a topographic feature along 2003~AZ$_{84}$'s limb, that can be interpreted as an abrupt chasm of width $\sim 23$~km and depth $> 8$~km or a smooth depression of width $\sim 80$~km and depth $\sim 13$~km (or an intermediate feature between those two extremes).
Professionals
http://hdl.handle.net/2268/212540
10.3847/1538-3881/aa74e9
http://adsabs.harvard.edu/abs/2017arXiv170510895D

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