DETAILED NUMERICAL SIMULATIONS ON THE FORMATION OF PILLARS AROUND H II REGIONS
نویسندگان
چکیده
منابع مشابه
Dynamical Formation of the Dark Molecular Hydrogen Clouds around Diffuse H II Regions
We examine the triggering process of molecular cloud formation around diffuse H II regions. We calculate the time evolution of the shell as well as of the H II region in a two-phase neutral medium, solving the UV and FUV radiative transfer, the thermal and chemical processes in the time-dependent hydrodynamics code. In the cold neutral medium, the ambient gas is swept up in the cold (T ∼ 30− 40...
متن کاملFormation of Mini-galaxies in Defunct Cosmological H Ii Regions
Using a large set of high resolution numerical simulations incorporating non-equilibrium molecular hydrogen chemistry and a constant source of external radiation, we study gas collapse in previously photo-ionized mini-galaxies with virial temperatures less than 104 K in the early universe (redshifts z = 10 − 20). We confirm that the mechanism of positive feedback of ionizing radiation on star f...
متن کاملNumerical Simulations of Galaxy Formation
An overview over the current status of modeling galaxies by means of numerical simulations is given. After a short description of how galaxies form in hierarchically clustering scenarios, success and failures of current simulations are demonstrated using three different applications: the morphology of present day galaxies; the appearance of high redshift galaxies; and the nature of the Ly-α for...
متن کاملNumerical Simulations of the Formation of Hurricane
This study examines the formation of Hurricane Gabrielle (2001), focusing on whether an initial disturbance and vertical wind shear were favorable for development. This examination is performed by running numerical experiments using the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5). Gabrielle is chosen as an interesting case to stu...
متن کاملUltracompact H Ii Regions
RESUMEN Discutimos algunos resultados observacionales recientes sobre regiones H II ultracompactas. En particular, discutimos la emisión extendida de algunas regiones H II UC y el descubrimiento de una nueva clase, denominada regiones H II " hipercompactas ". Además, describimos la obtención de la estructura de densidad usando la técnica del análisis deí ındice espectral. ABSTRACT We discuss so...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2010
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/723/2/971