Enrique Vazquez‐Semadeni

From filaments to the hub: Gas kinematics and massive star formation in G329.34+0.14

W L Zhang, Jin Zhou, Tie Liu, Xunchuan Liu et autres

We present 13CO (J=2–1) emission from the SEDIGISM survey, together with ALMA Band 3 and Band 6 observations from the ATOMS and QUARKS surveys, to investigate the gas kinematics and feedback processes in the massive hub-filament system G329.34+0.14 (hereafter G329). Based on …

cn, mx, cl, in, no, kr, hu (code pays fourni par la source)

An Agent-Based Model of the Stellar Mass Distribution

Enrique Raúl Olguín-Rodríguez, Carlos Gershenson, Enrique Vazquez‐Semadeni

The Initial Mass Function (IMF) describes the distribution of stellar masses formed in a stellar cluster and constitutes a fundamental constraint for theories of star formation. In this work, we investigate the emergence of the IMF slope using a minimal agent-based model …

mx, us (code pays fourni par la source)

From filaments to the hub: Gas kinematics and massive star formation in G329.34+0.14

Wenjun Zhang, Jianjun Zhou, Tie Liu, Xunchuan Liu et autres

We present 13 CO (J=2–1) emission from the SEDIGISM survey, together with ALMA Band 3 and Band 6 observations from the ATOMS and QUARKS surveys, to investigate the gas kinematics and feedback processes in the massive hub-filament system G329.34+0.14 (hereafter G329). Based …

cn, rs, mx, de, cl, us, in, no, kr, Nigéria, Afrique du Sud, hu, kz (code pays fourni par la source)

On the Roles of Gravity, Turbulence, and the Magnetic Field in Angular Momentum Transfer within Molecular Clouds

Griselda Arroyo-Chávez, Enrique Vazquez‐Semadeni, James Wurster

Abstract Observations of molecular structures on scales of ∼0.1−50 pc show that the specific angular momentum ( j ) scales with radius ( R ) as j ∼ R 3/2 . We study the effects of turbulence, gravity, and the magnetic field …

us, mx, gb (code pays fourni par la source)

Evidence for the gravity-driven and magnetically regularized gas flows feeding the massive protostellar cluster in Cepheus A

Panigrahy Sandhyarani, Chakali Eswaraiah, Di Li, Enrique Vazquez‐Semadeni et autres

The hierarchical interplay among gravity, magnetic fields, and turbulence in forming massive protostellar clusters remains elusive. We present high-resolution (~14 arc seconds ≃ 0.05 parsecs), 850-micrometer dust polarization and C 18 O line observations of Cepheus A using JCMT SCUBA-2/POL-2 and HARP. …

in, cn, mx, tw, us (code pays fourni par la source)

The sonic scale does not determine the core separation in turbulence-dominated molecular clouds

Manuel Zamora-Aviles, Javier Ballesteros‐Paredes, Aina Palau, Enrique Vazquez‐Semadeni et autres

ABSTRACT It has recently been suggested that the typical separation between cores in molecular clouds dominated by turbulence is determined by the sonic scale, the size scale at which the turbulent velocity dispersion equals the sound speed. In this work, we test …

mx (code pays fourni par la source)

What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium

Noé Brucy, Enrique Vazquez‐Semadeni, Tine Colman, Jérémy Fensch et autres

Star formation in galaxies is a complex phenomenon occurring on a very wide range of scales, and molecular clouds are at the heart of this process. The formation of these structures and the subsequent collapse of the gas within them to form …

us (code pays fourni par la source)

The turbulent support and global hierarchical collapse models for molecular clouds compared: differences, convergence, and myths

Enrique Vazquez‐Semadeni, Aina Palau, Gilberto C. Gómez, Griselda Arroyo-Chávez et autres

ABSTRACT We provide a detailed comparison between the ‘turbulent support’ (TS) and ‘global hierarchical collapse’ (GHC) theoretical models for molecular clouds and star formation, as a basis for the interpretation of observations and simulations. We discuss their respective interpretations of the observational …

mx, us, de, tw, it (code pays fourni par la source)

What is the contribution of gravitational infall on the mass assembly of star-forming clouds? A case study in a numerical simulation of the interstellar medium

Noé Brucy, Enrique Vazquez‐Semadeni, Tine Colman, Jérémy Fensch et autres

Star formation in galaxies is a complex phenomenon occurring on a very wide range of scales, and molecular clouds are at the heart of this process. The formation of these structures and the subsequent collapse of the gas within them to form …

The ISM and Star Formation

Enrique Vazquez‐Semadeni

This chapter presents an introduction to the components and the dynamics of the interstellar medium (ISM), emphasizing the fact that it is a fluid, i.e., a flowing continuous medium, in which no isolated objects exist, and therefore the notion of a “cloud” …

mx (code pays fourni par la source)

Molecular Clouds and Their Star-forming Properties

Enrique Vazquez‐Semadeni

This is the first chapter of the second part of the book, on cloud evolution and star formation. This chapter describes the main properties of molecular clouds relevant to the problem of star formation, including their chemical composition and their location in …

mx (code pays fourni par la source)

The Hydrodynamic Equations

Enrique Vazquez‐Semadeni

This chapter presents the derivation of the gas dynamics equations, both from the perspective of conservation conditions for mass, momentum and energy, and from the Boltzmann equation. In the process, the important Reynolds’ Transport Theorem and the constitutive relations leading to diffusive …

mx (code pays fourni par la source)