SPH simulations of high-speed collisions between asteroids and comets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10456627" target="_blank" >RIV/00216208:11320/22:10456627 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Sd_h-Dj~O7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Sd_h-Dj~O7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2022.115064" target="_blank" >10.1016/j.icarus.2022.115064</a>

Jazyk výsledku

angličtina

Název v původním jazyce

SPH simulations of high-speed collisions between asteroids and comets

Popis výsledku v původním jazyce

We studied impact processes by means of smoothed-particle hydrodynamics (SPH) simulations. The method was applied to modelling formation of main-belt families during the cometary bombardment (either early or late, ∼3.85Gy ago). If asteroids were bombarded by comets, as predicted by the Nice model, hundreds of asteroid families (catastrophic disruptions of diameter D≥100km bodies) should have been created, but the observed number is only 20. Therefore we computed a standard set of 125 simulations of collisions between representative D=100km asteroids and high-speed icy projectiles (comets), in the range 8 to 15km/s. According to our results, the largest remnant mass Mlr is similar as in low-speed collisions, due to appropriate scaling with the effective strength Qeff, but the largest fragment mass Mlf exhibits systematic differences — it is typically smaller for craterings and bigger for super-catastrophic events. This trend does not, however, explain the non-existence of old families. The respective parametric relations can be used in other statistical (Monte-Carlo) models to better understand collisions between asteroidal and cometary populations. © 2022 Elsevier Inc.

Název v anglickém jazyce

SPH simulations of high-speed collisions between asteroids and comets

Popis výsledku anglicky

We studied impact processes by means of smoothed-particle hydrodynamics (SPH) simulations. The method was applied to modelling formation of main-belt families during the cometary bombardment (either early or late, ∼3.85Gy ago). If asteroids were bombarded by comets, as predicted by the Nice model, hundreds of asteroid families (catastrophic disruptions of diameter D≥100km bodies) should have been created, but the observed number is only 20. Therefore we computed a standard set of 125 simulations of collisions between representative D=100km asteroids and high-speed icy projectiles (comets), in the range 8 to 15km/s. According to our results, the largest remnant mass Mlr is similar as in low-speed collisions, due to appropriate scaling with the effective strength Qeff, but the largest fragment mass Mlf exhibits systematic differences — it is typically smaller for craterings and bigger for super-catastrophic events. This trend does not, however, explain the non-existence of old families. The respective parametric relations can be used in other statistical (Monte-Carlo) models to better understand collisions between asteroidal and cometary populations. © 2022 Elsevier Inc.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA21-11058S" target="_blank" >GA21-11058S: Raný orbitální a chemický vývoj planetárních soustav</a><br>

Návaznosti

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

Rok uplatnění

2022

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

383

Číslo periodika v rámci svazku

září

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

115064

Kód UT WoS článku

000808091000004

EID výsledku v databázi Scopus

2-s2.0-85130168509