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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA13-01308S" target="_blank" >GA13-01308S: Dynamika malých těles sluneční soustavy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Svazek periodika

469

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

4400-4413

Kód UT WoS článku

000406837900045

EID výsledku v databázi Scopus

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