Detection of the Yarkovsky effect for C-type asteroids in the Veritas family

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10367585" target="_blank" >RIV/00216208:11320/17:10367585 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stx1186" target="_blank" >http://dx.doi.org/10.1093/mnras/stx1186</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stx1186" target="_blank" >10.1093/mnras/stx1186</a>

Result language
angličtina
Original language name
Detection of the Yarkovsky effect for C-type asteroids in the Veritas family
Original language description
The age of a young asteroid family can be determined by tracking the orbits of family members backward in time and showing that they converge at some time in the past. Here we consider the Veritas family. We find that the membership of the Veritas family increased enormously since the last detailed analysis of the family. Using backward integration, we confirm the convergence of nodal longitudes Omega, and, for the first time, also obtain a simultaneous convergence of pericentre longitudes pi. The Veritas family is found to be 8.23(0.31)(+0.37) Myr old. To obtain a tight convergence of Omega and pi, as expected from low ejection speeds of fragments, the Yarkovsky effect needs to be included in the modelling of the past orbital histories of Veritas family members. Using this method, we compute the Yarkovsky semimajor axis drift rates, da/dt, for 274 member asteroids. The distribution of da/dt values is consistent with a population of C-type objects with low densities and low thermal conductivities. The accuracy of individual da/dt measurements is limited by the effect of close encounters of member asteroids to (1) Ceres and other massive asteroids, which cannot be evaluated with confidence.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA13-01308S" target="_blank" >GA13-01308S: Dynamics of small bodies in the solar system</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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