Fibers in the NGC 1333 proto-cluster

Autor(en)

Alvaro Hacar, Mario Tafalla, Joao Alves

Abstrakt

Are the initial conditions for clustered star formation the same as for non-clustered star formation? To investigate the initial gas properties in young proto-clusters we carried out a comprehensive and high-sensitivity study of the internal structure, density, temperature, and kinematics of the dense gas content of the NGC1333 region in Perseus, one of the nearest and best studied embedded clusters. The analysis of the gas velocities in the Position-Position-Velocity space reveals an intricate underlying gas organization both in space and velocity. We identified a total of 14 velocity-coherent, (tran-)sonic structures within NGC1333, with similar physical and kinematic properties than those quiescent, star-forming (aka fertile) fibers previously identified in low-mass star-forming clouds. These fibers are arranged in a complex spatial network, build-up the observed total column density, and contain the dense cores and protostars in this cloud. Our results demonstrate that the presence of fibers is not restricted to low-mass clouds but can be extended to regions of increasing mass and complexity. We propose that the observational dichotomy between clustered and non-clustered star-forming regions might be naturally explained by the distinct spatial density of fertile fibers in these environments.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Leiden University, Observatorio Astronómico Nacional (OAN-IGN)

Journal

Astronomy & Astrophysics

Band

606

Anzahl der Seiten

24

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/201630348

Publikationsdatum

10-2017

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/08df832a-2275-4f7d-8f95-fce9a1f355fa