SPH/N-Body simulations of small (D=10 km) asteroidal breakups and improved parametric relations for Monte-Carlo collisional models

Kód výsledku v IS VaVaI

RIV/00216208:11320/17:10367588 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1016/j.icarus.2017.06.021

DOI - Digital Object Identifier

10.1016/j.icarus.2017.06.021

Jazyk výsledku

angličtina

Název v původním jazyce

SPH/N-Body simulations of small (D=10 km) asteroidal breakups and improved parametric relations for Monte-Carlo collisional models

Popis výsledku v původním jazyce

We report on our study of asteroidal breakups, i.e. fragmentations of targets, subsequent gravitational reaccumulation and formation of small asteroid families. We focused on parent bodies with diameters D-pb = 10 km. Simulations were performed with a smoothed-particle hydrodynamics (SPH) code combined with an efficient N-body integrator. We assumed various projectile sizes, impact velocities and impact angles (125 runs in total). Resulting size-frequency distributions are significantly different from scaled-down simulations with D-pb = 100 km targets (Durda et al., 2007). We derive new parametric relations describing fragment distributions, suitable for Monte-Carlo collisional models. We also characterize velocity fields and angular distributions of fragments, which can be used as initial conditions for N-body simulations of small asteroid families. Finally, we discuss a number of uncertainties related to SPH simulations.

Název v anglickém jazyce

SPH/N-Body simulations of small (D=10 km) asteroidal breakups and improved parametric relations for Monte-Carlo collisional models

Popis výsledku anglicky

We report on our study of asteroidal breakups, i.e. fragmentations of targets, subsequent gravitational reaccumulation and formation of small asteroid families. We focused on parent bodies with diameters D-pb = 10 km. Simulations were performed with a smoothed-particle hydrodynamics (SPH) code combined with an efficient N-body integrator. We assumed various projectile sizes, impact velocities and impact angles (125 runs in total). Resulting size-frequency distributions are significantly different from scaled-down simulations with D-pb = 100 km targets (Durda et al., 2007). We derive new parametric relations describing fragment distributions, suitable for Monte-Carlo collisional models. We also characterize velocity fields and angular distributions of fragments, which can be used as initial conditions for N-body simulations of small asteroid families. Finally, we discuss a number of uncertainties related to SPH simulations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

GA15-04816S: Celkový obraz hlavního pásu planetek - fyzikální vlastnosti planetek odvozené inverzí optické a infračervené fotometrie

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

Icarus

ISSN

0019-1035

e-ISSN

—

Svazek periodika

296

Číslo periodika v rámci svazku

listopad

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

239-256

Kód UT WoS článku

000406989200020

EID výsledku v databázi Scopus

—