Star formation and structure formation in galaxy collisions

Abstract

A number of theoretical and simulation results on star and structure formation in galaxy interactions and mergers is reviewed, and recent hydrodynamic simulations are presented. The role of gravity torques and ISM turbulence in galaxy interactions, in addition to the tidal field, is highlighted. Interactions can drive gas inflows towards the central kpc and trigger a central starburst, the intensity and statistical properties of which are discussed. A kinematically decoupled core and a supermassive central black hole can be fueled. Outside of the central kpc, many structures can form inside tidal tails, collisional ring, bridges, including super star clusters and tidal dwarf galaxies. The formation of super star clusters in galaxy mergers can now be directly resolved in hydrodynamic simulations. Their formation mechanisms and long-term evolution are reviewed, and the connection with present-day early-type galaxies is discussed.

This review is an extended version of the proceedings of the "Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies" conference

References in corpus (4)

• Morphological quenching of star formation: making early-type galaxies red
• Less than 10 percent of star formation in z=0.6 massive galaxies is triggered by major interactions
• Tidal Dwarf Galaxies and missing baryons
• Hydrodynamic Simulations of M51 and the interaction with NGC 5195

Cited by in corpus (8)

• Hydrodynamics of high-redshift galaxy collisions: From gas-rich disks to dispersion-dominated mergers and compact spheroids
• The vast thin plane of M31 co-rotating dwarfs: an additional fossil signature of the M31 merger and of its considerable impact in the whole Local Group
• ALMA/ACA CO Survey of the IC 1459 and NGC 4636 Groups: Environmental Effects on the Molecular Gas of Group Galaxies
• Star Formation Histories Across the Interacting Galaxy NGC 6872, the Largest-Known Spiral
• Star formation in galaxy mergers: ISM turbulence, dense gas excess, and scaling relations for disks and starbusts
• Resolving the Nuclear Environments of Tidal Disruption Event Host Galaxies within 45 pc
• Understanding Galaxy Mergers & AGN Feedback with UVIT
• COSMOS-Web: Galaxy Size and Surface Brightness Evolution at Rest-Frame 1.22 $\mu$m Since $z=3$