NEOMOD: A New Orbital Distribution Model for Near-Earth Objects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10474955" target="_blank" >RIV/00216208:11320/23:10474955 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xL9fvZP7vC" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xL9fvZP7vC</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/ace040" target="_blank" >10.3847/1538-3881/ace040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

NEOMOD: A New Orbital Distribution Model for Near-Earth Objects

Popis výsledku v původním jazyce

Near-Earth Objects (NEOs) are a transient population of small bodies with orbits near or in the terrestrial planet region. They represent a mid-stage in the dynamical cycle of asteroids and comets, which starts with their removal from the respective source regions-the main belt and trans-Neptunian scattered disk-and ends as bodies impact planets, disintegrate near the Sun, or are ejected from the solar system. Here we develop a new orbital model of NEOs by numerically integrating asteroid orbits from main-belt sources and calibrating the results on observations of the Catalina Sky Survey. The results imply a size-dependent sampling of the main belt with the.6 and 3:1 resonances producing similar or equal to 30% of NEOs with absolute magnitudes H = 15 and similar or equal to 80% of NEOs with H = 25. Hence, the large and small NEOs have different orbital distributions. The inferred flux of H &lt; 18 bodies into the 3:1 resonance can be sustained only if the main-belt asteroids near the resonance drift toward the resonance at the maximal Yarkovsky rate (similar or equal to 2 x 10(-4) au Myr(-1) for diameter D = 1 km and semimajor axis a = 2.5 au). This implies obliquities theta similar or equal to 0 degrees for a &lt; 2.5 au and theta similar or equal to 180 degrees for a &gt; 2.5 au, both in the immediate neighborhood of the resonance (the same applies to other resonances as well). We confirm the size-dependent disruption of asteroids near the Sun found in previous studies. An interested researcher can use the publicly available NEOMOD Simulator to generate user-defined samples of NEOs from our model.

Název v anglickém jazyce

NEOMOD: A New Orbital Distribution Model for Near-Earth Objects

Popis výsledku anglicky

Near-Earth Objects (NEOs) are a transient population of small bodies with orbits near or in the terrestrial planet region. They represent a mid-stage in the dynamical cycle of asteroids and comets, which starts with their removal from the respective source regions-the main belt and trans-Neptunian scattered disk-and ends as bodies impact planets, disintegrate near the Sun, or are ejected from the solar system. Here we develop a new orbital model of NEOs by numerically integrating asteroid orbits from main-belt sources and calibrating the results on observations of the Catalina Sky Survey. The results imply a size-dependent sampling of the main belt with the.6 and 3:1 resonances producing similar or equal to 30% of NEOs with absolute magnitudes H = 15 and similar or equal to 80% of NEOs with H = 25. Hence, the large and small NEOs have different orbital distributions. The inferred flux of H &lt; 18 bodies into the 3:1 resonance can be sustained only if the main-belt asteroids near the resonance drift toward the resonance at the maximal Yarkovsky rate (similar or equal to 2 x 10(-4) au Myr(-1) for diameter D = 1 km and semimajor axis a = 2.5 au). This implies obliquities theta similar or equal to 0 degrees for a &lt; 2.5 au and theta similar or equal to 180 degrees for a &gt; 2.5 au, both in the immediate neighborhood of the resonance (the same applies to other resonances as well). We confirm the size-dependent disruption of asteroids near the Sun found in previous studies. An interested researcher can use the publicly available NEOMOD Simulator to generate user-defined samples of NEOs from our model.

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

2023

Kód důvěrnosti údajů

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

Název periodika

The Astronomical Journal

ISSN

0004-6256

e-ISSN

1538-3881

Svazek periodika

166

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

30

Strana od-do

55

Kód UT WoS článku

001026520600001

EID výsledku v databázi Scopus

2-s2.0-85165321563