TY - JOUR
T1 - Collapse and fragmentation of gaussian barotropic protostellar clouds
AU - Gómez-Ramírez, F.
AU - Klapp, J.
AU - Cervantes-Cota, Jorge L.
AU - Arreaga-García, G.
AU - Bahena, D.
N1 - Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 2012.
PY - 2012
Y1 - 2012
N2 - We examine the problem of the collapse and fragmentation of molecular clouds with a Gaussian density distribution with high resolution, double precision numerical simulations using the GADGET-2 code. To describe the thermodynamic properties of the cloud during the collapse—to mimic the rise of temperature predicted by radiative transfer—we use a barotropic equation of state that introduces a critical density to separate the isothermal and adiabatic regimes. We discuss the effects of this critical density in the formation of multiple systems. We confirm the tendency found for Plummer and Gaussian models that if the collapse changes from isothermal to adiabatic at earlier times that occurs for the models with a lower critical density, the collapse is slowed down, and this enhances the fragments’ change to survive. However, this effect happens up to a threshold density below which single systems tend to form. On the other hand, by setting a bigger initial perturbation amplitude, the collapse is faster and in some cases a final single object is formed.
AB - We examine the problem of the collapse and fragmentation of molecular clouds with a Gaussian density distribution with high resolution, double precision numerical simulations using the GADGET-2 code. To describe the thermodynamic properties of the cloud during the collapse—to mimic the rise of temperature predicted by radiative transfer—we use a barotropic equation of state that introduces a critical density to separate the isothermal and adiabatic regimes. We discuss the effects of this critical density in the formation of multiple systems. We confirm the tendency found for Plummer and Gaussian models that if the collapse changes from isothermal to adiabatic at earlier times that occurs for the models with a lower critical density, the collapse is slowed down, and this enhances the fragments’ change to survive. However, this effect happens up to a threshold density below which single systems tend to form. On the other hand, by setting a bigger initial perturbation amplitude, the collapse is faster and in some cases a final single object is formed.
UR - http://www.scopus.com/inward/record.url?scp=84929413603&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-17958-7_15
DO - 10.1007/978-3-642-17958-7_15
M3 - Artículo
AN - SCOPUS:84929413603
SN - 1863-5520
SP - 203
EP - 211
JO - Environmental Science and Engineering
JF - Environmental Science and Engineering
ER -