Accretion centers induced in a molecular cloud core after a penetrating collision

G. Arreaga-García*, J. Klapp

*Autor correspondiente de este trabajo

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

1 Cita (Scopus)

Resumen

The aim of this paper is to present a set of numerical simulations of a penetrating collision, in which a small gas core (the bullet) penetrates a larger gas core (the target). In the target core, the gravitational collapse is supposed to be ongoing before the collision. Each colliding core has a uniform density profile and rigid body rotation; besides the mass and size of the target core have been chosen to represent the observed molecular cloud core L1544. We modified the Lagrangian code Gagdet2 to identify when a gas particle can become an accretion center, and to inherit the mass and momentum of all the very close neighboring particles. Three collision models are here considered for pre-collision velocities v/c0= 2.5, 5.0, and 10 Mach. The outcome of these collision models are presented only for two different values of the bullet’s radius, that is for R0/ 4, and R0/2 where R0 is the radius of the target core. Such collision models reveal how accretion centers are formed, with a spatial distribution that strongly depends on the pre-collision velocity. We thus show hereby that penetrating collisions may have a major and favorable influence in the star formation process.

Idioma originalInglés
Título de la publicación alojadaSelected Topics of Computational and Experimental Fluid Mechanics, 2013
EditoresJaime Klapp, Abraham Medina Ovando, Abel Lopez Villa, Leonardo Di G. Sigalotti, Jaime Klapp, Gerardo Ruiz Chavarria, Leonardo Di G. Sigalotti
EditorialSpringer Berlin Heidelberg
Páginas505-513
Número de páginas9
ISBN (versión impresa)9783319114866
DOI
EstadoPublicada - 2015
EventoInternational Enzo Levi Spring School and 19th National Congress of the Fluid Dynamics Division of the Mexican Physical Society, 2013 - Jiutepec, México
Duración: 13 nov. 201515 nov. 2015

Serie de la publicación

NombreEnvironmental Science and Engineering
ISSN (versión impresa)1863-5520
ISSN (versión digital)1863-5539

Conferencia

ConferenciaInternational Enzo Levi Spring School and 19th National Congress of the Fluid Dynamics Division of the Mexican Physical Society, 2013
País/TerritorioMéxico
CiudadJiutepec
Período13/11/1515/11/15

Nota bibliográfica

Publisher Copyright:
© Springer International Publishing Switzerland 2015.

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