Turbulence Sets the Initial Conditions for Star Formation in High-pressure Environments
نویسنده
چکیده
Despite the simplicity of theoretical models of supersonically turbulent, isothermal media, their predictions successfully match the observed gas structure and star formation activity within low-pressure (P/k < 10 K cm) molecular
منابع مشابه
Comparison of different turbulence models in a high pressure fuel jet
In this study, modeling of a fuel jet which has been injected by high pressure into a low-pressure tank are investigated. Due to the initial conditions and the geometry of this case and similar cases (like CNG injectors in internal combustion engines (ICE)), the barrel shocks and Mach disk are observed. Hence a turbulence and transient flow will be expected with lots of shocks and waves. Accord...
متن کاملMassive Star and Star Cluster Formation
I review the status of massive star formation theories: accretion from collapsing, massive, turbulent cores; competitive accretion; and stellar collisions. I conclude the observational and theoretical evidence favors the first of these models. I then discuss: the initial conditions of star cluster formation as traced by infrared dark clouds; the cluster formation timescale; and comparison of th...
متن کاملClustered Massive Star Formation in Molecular Clouds
I review some important questions in the field of massive star formation: What are the initial conditions for proto star clusters and how do they arise? What are the initial conditions for individual massive star formation within star clusters? How do massive protostars accumulate their mass? I compare the Turbulent Core Model (McKee & Tan 2003) to several nearby regions, including Orion KL. He...
متن کاملTimescales for Low-Mass Star Formation in Extragalactic Environments: Implications for the Stellar IMF
We investigate the physical and chemical conditions necessary for low-mass star formation in extragalactic environments by calculating various characteristic timescales associated with star formation for a range of initial conditions. The balance of these timescales indicates whether low-mass star formation is enhanced or inhibited under certain physical conditions. In this study, we consider t...
متن کاملar X iv : a st ro - p h / 05 12 30 2 v 1 1 2 D ec 2 00 5 Complexes of Stars and Complexes of Star Clusters
Most star complexes are in fact complexes of stars, clusters and gas clouds; term " star complexes " was introduced as general one disregarding the preferential content of a complex. Generally the high rate of star formation in a complex is accompanied by the high number of bound clusters, including massive ones, what was explained by the high gas pressure in such regions. However, there are al...
متن کامل