Primordial mass segregation of star clusters with primordial binaries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00537736" target="_blank" >RIV/67985815:_____/20:00537736 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/202037490" target="_blank" >https://doi.org/10.1051/0004-6361/202037490</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202037490" target="_blank" >10.1051/0004-6361/202037490</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Primordial mass segregation of star clusters with primordial binaries

Popis výsledku v původním jazyce

Since a significant fraction of stars are observed in binary systems and it is widely accepted that most stars are born in binary systems, we aim to investigate what role a primordial binary population (even up to 100% binaries) plays in the loss of primordial mass segregation of young star clusters. We used numerical N-body models similar in size to the Orion Nebula Cluster (ONC) - a representative of young open clusters - integrated over several relaxation times to draw conclusions on the evolution of its mass segregation. We also compared our models to the observed ONC. We found that tau(v) depends on the binary star fraction and the distribution of initial binary parameters that include a semi-major axis, eccentricity, and mass ratio. For instance, in the models with 50% binaries, we find tau(v)=(2.7 +/- 0.8) t(rh), while for 100% binary fraction, we find a lower value tau(v)=(2.1 +/- 0.6) t(rh). We also conclude that the initially completely mass segregated clusters, even with binaries, are more compatible with the present-day ONC than the non-segregated ones.

Název v anglickém jazyce

Primordial mass segregation of star clusters with primordial binaries

Popis výsledku anglicky

Since a significant fraction of stars are observed in binary systems and it is widely accepted that most stars are born in binary systems, we aim to investigate what role a primordial binary population (even up to 100% binaries) plays in the loss of primordial mass segregation of young star clusters. We used numerical N-body models similar in size to the Orion Nebula Cluster (ONC) - a representative of young open clusters - integrated over several relaxation times to draw conclusions on the evolution of its mass segregation. We also compared our models to the observed ONC. We found that tau(v) depends on the binary star fraction and the distribution of initial binary parameters that include a semi-major axis, eccentricity, and mass ratio. For instance, in the models with 50% binaries, we find tau(v)=(2.7 +/- 0.8) t(rh), while for 100% binary fraction, we find a lower value tau(v)=(2.1 +/- 0.6) t(rh). We also conclude that the initially completely mass segregated clusters, even with binaries, are more compatible with the present-day ONC than the non-segregated ones.

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/GA18-20083S" target="_blank" >GA18-20083S: Gaia-GALEX přehled horkých podtrpaslíků</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

638

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

11

Strana od-do

A155

Kód UT WoS článku

000549956900004

EID výsledku v databázi Scopus

2-s2.0-85088272482