Using molecular gas observations to guide initial conditions for star cluster simulations

Author:

Sills Alison1ORCID,Rieder Steven23ORCID,Buckner Anne S M3ORCID,Hacar Alvaro4,Portegies Zwart Simon5,Teixeira Paula S6ORCID

Affiliation:

1. Department of Physics and Astronomy, McMaster University , 1280 Main Street West, Hamilton, ON L8S 4M1, Canada

2. Geneva Observatory, University of Geneva , Chemin Pegasi 51, CH-1290 Sauverny, Switzerland

3. School of Physics and Astronomy, University of Exeter , Stocker Road, Exeter EX4 4QL, UK

4. Department of Astrophysics, University of Vienna , Türkenschanzstrasse 17, A-1180 Vienna, Austria

5. Leiden Observatory, Leiden University , NL-2300RA Leiden, the Netherlands

6. SUPA, School of Physics and Astronomy, University of St. Andrews , North Haugh, St. Andrews, KY16 9SS Fife, UK

Abstract

ABSTRACT The earliest evolution of star clusters involves a phase of co-existence of both newly formed stars, and the gas from which they are forming. Observations of the gas in such regions provide a wealth of data that can inform the simulations which are needed to follow the evolution of such objects forward in time. We present a method for transforming the observed gas properties into initial conditions for simulations that include gas, stars, and ongoing star formation. We demonstrate our technique using the Orion Nebula Cluster. Since the observations cannot provide all the necessary information for our simulations, we make choices for the missing data and assess the impact of those choices. We find that the results are insensitive to the adopted choices of the gas velocity in the plane of the sky. The properties of the surrounding gas cloud (e.g. overall density and size), however, have an effect on the star formation rate and pace of assembly of the resultant star cluster. We also analyse the stellar properties of the cluster and find that the stars become more tightly clustered and in a stronger radial distribution even as new stars form in the filament.

Funder

Natural Sciences and Engineering Research Council of Canada

STFC

European Research Council

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. 2a Results: galaxy to cloud scales;Frontiers in Astronomy and Space Sciences;2023-11-09

2. Using molecular gas observations to guide initial conditions for star cluster simulations;Monthly Notices of the Royal Astronomical Society;2022-12-20

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