Emergence of high-mass stars in complex fiber networks (EMERGE) V. From filaments to spheroids: the origin of the hub-filament systems

Author(s)

A. Hacar, R. Konietzka, D. Seifried, S. E. Clark, A. Socci, F. Bonanomi, A. Burkert, E. Schisano, J. Kainulainen, R. Smith

Abstract

Identified as parsec-size, gas clumps at the junction of multiple

filaments, hub-filament systems (HFS) play a crucial role during the

formation of young clusters and high-mass stars. These HFS appear

nevertheless to be detached from most galactic filaments when compared

in the mass-length (M-L) phase-space. We aim to characterize the early

evolution of HFS as part of the filamentary description of the

interstellar medium. Combining previous scaling relations with new

analytic calculations, we created a toy model to explore the different

physical regimes described by the M-L diagram. Despite its simplicity,

our model accurately reproduces several observational properties

reported for filaments and HFS such as their expected typical aspect

ratio ($A$), mean surface density ($\Sigma$), and gas accretion rate

($\dot{m}$). Moreover, this model naturally explains the different mass

and length regimes populated by filaments and HFS, respectively. Our

model predicts a dichotomy between filamentary ($A\geq 3$) and

spheroidal ($A

Organisation(s)

Department of Astrophysics

External organisation(s)

Harvard-Smithsonian Center for Astrophysics, Universität zu Köln, Stanford University, Ludwig-Maximilians-Universität München, Excellence Cluster ORIGINS, Max-Planck-Institut für extraterrestrische Physik, Istituto di Astrofisica e Planetologia Spaziali , Chalmers University of Technology, University of St. Andrews

Journal

Astronomy & Astrophysics

Volume

694

No. of pages

17

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/202450779

Publication date

11-2024

Peer reviewed

Yes

Austrian Fields of Science 2012

103003 Astronomy, 103004 Astrophysics

Keywords

Portal url

https://ucrisportal.univie.ac.at/en/publications/31c8778a-dd20-4db3-b722-3f0721405d68