Kinematics and Structure of Star-forming Regions: Insights from Cold Collapse Models

Abstract

The origin of the observed morphological and kinematic substructure of young star forming regions is a matter of debate. We offer a new analysis of data from simulations of globally gravitationally collapsing clouds of progenitor gas to answer questions about sub-structured star formation in the context of cold collapse. As a specific example, we compare our models to recent radial velocity survey data from the IN-SYNC survey of Orion and new observations of dense gas kinematics, and offer possible interpretations of kinematic and morphological signatures in the region. In the context of our model, we find the frequently-observed hub-filament morphology of the gas naturally arises during gravitational evolution, as well as the dynamically-distinct kinematic substructure of stars. We emphasize that the global and not just the local gravitational potential plays an important role in determining the dynamics of both clusters and filaments.

7 pages, 4 figures, accepted to MNRAS

References in corpus (5)

• Filamentary structure of star-forming complexes
• On the Structure of the Orion A Cloud and the Formation of the Orion Nebula Cluster
• Bondi-Hoyle-Littleton accretion and the upper mass stellar IMF
• Overview of the Orion Complex
• Gravitational Focusing and the Star Cluster Initial Mass Function

Cited by in corpus (15)

• The Spatial Relation between Young Star Clusters and Molecular Clouds in M 51 with LEGUS
• From diffuse gas to dense molecular cloud cores
• An ALMA study of hub-filament systems I. On the clump mass concentration within the most massive cores
• Gaia Stellar Kinematics in the Head of the Orion A Cloud: Runaway Stellar Groups and Gravitational Infall
• The 3-D Kinematics of the Orion Nebula Cluster: NIRSPEC-AO Radial Velocities of the Core Population
• The Origins of Protostellar Core Angular Momenta
• High-resolution APEX/LAsMA ${}^{12}$CO and ${}^{13}$CO (3-2) observation of the G333 giant molecular cloud complex : I. Evidence for gravitational acceleration in hub-filament systems
• External photoevaporation of protoplanetary discs in Cygnus OB2: linking discs to star formation dynamical history
• Low Mass Stars as Tracers of Star and Cluster Formation
• ALMA-IMF XIII: N${}_2$H${}^{+}$ kinematic analysis on the intermediate protocluster G353.41
• Gravitational collapse and accretion flows in the hub filament system G323.46-0.08
• Formation of hub-filament structure triggered by cloud-cloud collision in W33 complex
• Kinematics and star formation of hub-filament systems in W49A
• Gravity or turbulence V: Star forming regions undergoing violent relaxation
• Gibbs Point Process Model for Young Star Clusters in M33