Emergence of high-mass stars in complex fiber networks (EMERGE) V. From filaments to spheroids: the origin of the hub-filament systems
- Autor(en)
- A. Hacar, R. Konietzka, D. Seifried, S. E. Clark, A. Socci, F. Bonanomi, A. Burkert, E. Schisano, J. Kainulainen, R. Smith
- Abstrakt
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(en)
- Institut für Astrophysik
- Externe Organisation(en)
- 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
- Band
- 694
- Anzahl der Seiten
- 17
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361/202450779
- Publikationsdatum
- 11-2024
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie, 103004 Astrophysik
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/31c8778a-dd20-4db3-b722-3f0721405d68