Radial distribution of distant trans-Neptunian objects points to Sun's formation in a stellar cluster

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476490" target="_blank" >RIV/00216208:11320/23:10476490 - isvavai.cz</a>

Výsledek na webu

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

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2023.115738" target="_blank" >10.1016/j.icarus.2023.115738</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radial distribution of distant trans-Neptunian objects points to Sun's formation in a stellar cluster

Popis výsledku v původním jazyce

The Scattered Disk Objects (SDOs) are a population of trans-Neptunian bodies with semimajor axes 50 &lt; a less than or similar to 1000 au and perihelion distances q greater than or similar to 30 au. The detached SDOs with orbits beyond the reach of Neptune (roughly q &gt; 35 au) are of special interest here as an important constraint on the early evolution of the outer Solar System. The semimajor axis profile of detached SDOs at 50-500 au, as characterized from the Dark Energy Survey (DES), is radially extended, but previous dynamical models of Neptune&apos;s early migration produce a relatively compact profile. This problem is most likely related to Sun&apos;s birth environment in a stellar cluster. We perform new dynamical simulations that account for cluster effects and show that the orbital distribution of SDOs can be explained if a particularly close stellar encounter occurred early on (e.g., M dwarf with the mass similar or equal to 0.2 M-circle dot approaching the Sun at similar or equal to 200 au). For such an encounter to happen with a reasonably high probability the Sun must have formed in a stellar cluster with eta T greater than or similar to 10(4) Myr pc(-3,) where eta is the stellar number density and T is the Sun&apos;s residence time in the cluster.

Název v anglickém jazyce

Radial distribution of distant trans-Neptunian objects points to Sun's formation in a stellar cluster

Popis výsledku anglicky

The Scattered Disk Objects (SDOs) are a population of trans-Neptunian bodies with semimajor axes 50 &lt; a less than or similar to 1000 au and perihelion distances q greater than or similar to 30 au. The detached SDOs with orbits beyond the reach of Neptune (roughly q &gt; 35 au) are of special interest here as an important constraint on the early evolution of the outer Solar System. The semimajor axis profile of detached SDOs at 50-500 au, as characterized from the Dark Energy Survey (DES), is radially extended, but previous dynamical models of Neptune&apos;s early migration produce a relatively compact profile. This problem is most likely related to Sun&apos;s birth environment in a stellar cluster. We perform new dynamical simulations that account for cluster effects and show that the orbital distribution of SDOs can be explained if a particularly close stellar encounter occurred early on (e.g., M dwarf with the mass similar or equal to 0.2 M-circle dot approaching the Sun at similar or equal to 200 au). For such an encounter to happen with a reasonably high probability the Sun must have formed in a stellar cluster with eta T greater than or similar to 10(4) Myr pc(-3,) where eta is the stellar number density and T is the Sun&apos;s residence time in the cluster.

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

Icarus

ISSN

0019-1035

e-ISSN

1090-2643

Svazek periodika

406

Číslo periodika v rámci svazku

prosinec

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

115738

Kód UT WoS článku

001155207900001

EID výsledku v databázi Scopus

2-s2.0-85167833464