Title
Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution
Date Issued
01 January 2013
Access level
open access
Resource Type
journal article
Author(s)
Hanuš J.
ÄŽurech J.
Brož M.
Marciniak A.
Warner B.D.
Pilcher F.
Stephens R.
Behrend R.
Carry B.
ÄŒapek D.
Antonini P.
Audejean M.
Augustesen K.
Barbotin E.
Baudouin P.
Bayol A.
Bernasconi L.
Borczyk W.
Bosch J.G.
Brochard E.
Brunetto L.
Casulli S.
Cazenave A.
Charbonnel S.
Christophe B.
Coloma J.
Conjat M.
Cooney W.
Correira H.
Cotrez V.
Coupier A.
Crippa R.
Cristofanelli M.
Dalmas C.
Danavaro C.
Demeautis C.
Droege T.
Durkee R.
Esseiva N.
Esteban M.
Fagas M.
Farroni G.
Fauvaud M.
Fauvaud S.
Del Freo F.
Garcia L.
Geier S.
Godon C.
Grangeon K.
Hamanowa H.
Hamanowa H.
Heck N.
Hellmich S.
Higgins D.
Hirsch R.
Husarik M.
Itkonen T.
Jade O.
Kamiński K.
Kankiewicz P.
Klotz A.
Koff R.A.
Kryszczyńska A.
Kwiatkowski T.
Laffont A.
Leroy A.
Lecacheux J.
Leonie Y.
Leyrat C.
Manzini F.
Martin A.
Masi G.
Matter D.
Michałowski J.
Michałowski M.J.
Michałowski T.
Michelet J.
Michelsen R.
Morelle E.
Mottola S.
Naves R.
Nomen J.
Oey J.
Ogłoza W.
Oksanen A.
Oszkiewicz D.
Pääkkönen P.
Paiella M.
Pallares H.
Paulo J.
Pavic M.
Payet B.
Polińska M.
Polishook D.
Poncy R.
Revaz Y.
Rinner C.
Rocca M.
Roche A.
Centre national de la Recherche Scientifique
Publisher(s)
EDP Sciences
Abstract
Context. The larger number of models of asteroid shapes and their rotational states derived by the lightcurve inversion give us better insight into both the nature of individual objects and the whole asteroid population. With a larger statistical sample we can study the physical properties of asteroid populations, such as main-belt asteroids or individual asteroid families, in more detail. Shape models can also be used in combination with other types of observational data (IR, adaptive optics images, stellar occultations), e.g., to determine sizes and thermal properties. Aims. We use all available photometric data of asteroids to derive their physical models by the lightcurve inversion method and compare the observed pole latitude distributions of all asteroids with known convex shape models with the simulated pole latitude distributions. Methods. We used classical dense photometric lightcurves from several sources (Uppsala Asteroid Photometric Catalogue, Palomar Transient Factory survey, and from individual observers) and sparse-in-time photometry from the U.S. Naval Observatory in Flagstaff, Catalina Sky Survey, and La Palma surveys (IAU codes 689, 703, 950) in the lightcurve inversion method to determine asteroid convex models and their rotational states. We also extended a simple dynamical model for the spin evolution of asteroids used in our previous paper. Results. We present 119 new asteroid models derived from combined dense and sparse-in-time photometry. We discuss the reliability of asteroid shape models derived only from Catalina Sky Survey data (IAU code 703) and present 20 such models. By using different values for a scaling parameter cYORP (corresponds to the magnitude of the YORP momentum) in the dynamical model for the spin evolution and by comparing synthetic and observed pole-latitude distributions, we were able to constrain the typical values of the c YORP parameter as between 0.05 and 0.6. © 2013 ESO.
Volume
551
Language
English
Scopus EID
2-s2.0-84874262809
Source
Astronomy and Astrophysics
ISSN of the container
00046361
Sponsor(s)
The work of JH has been supported by grant GA UK 134710 of the Grant agency of the Charles University and by the project SVV 265301 of the Charles University in Prague. The work of J.H. and J.Ď. has been supported by grants GACR 209/10/0537 and P209/12/0229 of the Czech Science Foundation, the work of J.D. and M.B. by the Research Program MSM0021620860 of the Czech Ministry of Education, and the work of MB also by the grant GACR 13-01308S of the Grant Agency of the Czech Republic. The work of TSR was carried out through the Gaia Research for European Astronomy Training (GREAT-ITN) network. He has received funding from the European Union Seventh Framework Program (FP7/2007-2013) under grant agreement no. 264895. This work is partially based on observations made at the South African Astronomical Observatory (SAAO). It was based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. This work is partially based on observations carried out with the Pic du Midi Observatory 0.6 m telescope, a facility operated by the Observatoire Midi-Pyrénées and Association T60, an amateur association. The calculations were performed on the computational cluster Tiger at the Astronomical Institute of Charles University in Prague ( http://sirrah.troja.mff.cuni.cz/tiger ).
Sources of information: Directorio de Producción Científica Scopus