14 papers
The Lifetimes of Molecular Cloud Cores: What is the Role of the Magnetic Field?
E. Vazquez-Semadeni, J. Kim, M. Shadmehri +1
We discuss the lifetimes and evolution of dense cores formed as turbulent density fluctuations in magnetized, isothermal molecular clouds. We consider numerical simulations in whic…
The Turbulent Star Formation Model. Outline and Tests
Enrique Vazquez-Semadeni
We summarize the current status of the turbulent model of star formation in turbulent molecular clouds. In this model, clouds, clumps and cores form a hierarchy of nested density f…
Magnetic Pressure-Density Correlation in Compressible MHD Turbulence
Thierry Passot, Enrique Vazquez-Semadeni
We discuss magnetic pressure and density fluctuations in strongly turbulent isothermal MHD flows in "1+2/3" dimensions. We first consider "simple" nonlinear MHD waves, which allow…
The Origin of Molecular Cloud Turbulence and its role on Determining the Star Formation Efficiency
Enrique Vazquez-Semadeni, Javier Ballesteros-Paredes, Ralf Klessen
We suggest that molecular cloud (MC) turbulence is a consequence of the very process of MC formation by collisions of larger-scale flows in the diffuse atomic gas, which generate t…
Numerical Models of the ISM
Enrique Vazquez-Semadeni
I review recent results from numerical simulations on the structure and dynamics of the ISM, and attempt to put together a coherent dynamical scenario. In particular, I discuss res…
Thermal Instability and Magnetic Pressure in the Turbulent ISM
Enrique Vazquez-Semadeni, Adriana Gazol, Thierry Passot +1
We review recent results on the nonlinear development of thermal instability in the context of the turbulent atomic interstellar medium (ISM). First, we pre- sent a brief summary o…