Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. PHANGS-JWST First Results: Rapid Evolution of Star Formation in the Central Molecular Gas Ring of NGC 1365
 
research article

PHANGS-JWST First Results: Rapid Evolution of Star Formation in the Central Molecular Gas Ring of NGC 1365

Schinnerer, Eva
•
Emsellem, Eric
•
Henshaw, Jonathan D.
Show more
February 1, 2023
The Astrophysical Journal Letters

Large-scale bars can fuel galaxy centers with molecular gas, often leading to the development of dense ringlike structures where intense star formation occurs, forming a very different environment compared to galactic disks. We pair similar to 0 3'' (30 pc) resolution new JWST/MIRI imaging with archival ALMA CO(2-1) mapping of the central similar to 5 kpc of the nearby barred spiral galaxy NGC 1365 to investigate the physical mechanisms responsible for this extreme star formation. The molecular gas morphology is resolved into two well-known bright bar lanes that surround a smooth dynamically cold gas disk (R-gal similar to 475 pc) reminiscent of non-star-forming disks in early-type galaxies and likely fed by gas inflow triggered by stellar feedback in the lanes. The lanes host a large number of JWST-identified massive young star clusters. We find some evidence for temporal star formation evolution along the ring. The complex kinematics in the gas lanes reveal strong streaming motions and may be consistent with convergence of gas streamlines expected there. Indeed, the extreme line widths are found to be the result of inter-"cloud" motion between gas peaks; SCOUSEPY decomposition reveals multiple components with line widths of asymptotic to 19 km s(-1) and surface densities of & raquo; 800 M(circle dot)pc(-2), similar to the properties observed throughout the rest of the central molecular gas structure. Tailored hydrodynamical simulations exhibit many of the observed properties and imply that the observed structures are transient and highly time-variable. From our study of NGC 1365, we conclude that it is predominantly the high gas inflow triggered by the bar that is setting the star formation in its CMZ.

  • Details
  • Metrics
Type
research article
DOI
10.3847/2041-8213/acac9e
Web of Science ID

WOS:000939869900001

Author(s)
Schinnerer, Eva
Emsellem, Eric
Henshaw, Jonathan D.
Liu, Daizhong
Meidt, Sharon E.
Querejeta, Miguel
Renaud, Florent
Sormani, Mattia C.
Sun, Jiayi
Egorov, Oleg V.
Show more
Date Issued

2023-02-01

Published in
The Astrophysical Journal Letters
Volume

944

Issue

2

Start page

L15

Subjects

Astronomy & Astrophysics

•

Astronomy & Astrophysics

•

inner lindblad resonance

•

high angular resolution

•

nuclear rings

•

galactic-center

•

secular evolution

•

radio-continuum

•

formation cycle

•

fornax cluster

•

young clusters

•

galaxy centers

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

Available on Infoscience
March 27, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/196571
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés