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

G. Arreaga-García; J. Klapp

doi:10.1007/978-3-319-11487-3_41

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

G. Arreaga-García^*, J. Klapp

^*Corresponding author for this work

Departamento de Investigación en Física

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

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.

Original language	English
Title of host publication	Selected Topics of Computational and Experimental Fluid Mechanics, 2013
Editors	Jaime Klapp, Abraham Medina Ovando, Abel Lopez Villa, Leonardo Di G. Sigalotti, Jaime Klapp, Gerardo Ruiz Chavarria, Leonardo Di G. Sigalotti
Publisher	Springer Berlin Heidelberg
Pages	505-513
Number of pages	9
ISBN (Print)	9783319114866
DOIs	https://doi.org/10.1007/978-3-319-11487-3_41
State	Published - 2015
Event	International Enzo Levi Spring School and 19th National Congress of the Fluid Dynamics Division of the Mexican Physical Society, 2013 - Jiutepec, Mexico Duration: 13 Nov 2015 → 15 Nov 2015

Publication series

Name	Environmental Science and Engineering
ISSN (Print)	1863-5520
ISSN (Electronic)	1863-5539

Conference

Conference	International Enzo Levi Spring School and 19th National Congress of the Fluid Dynamics Division of the Mexican Physical Society, 2013
Country/Territory	Mexico
City	Jiutepec
Period	13/11/15 → 15/11/15

Bibliographical note

Publisher Copyright:
© Springer International Publishing Switzerland 2015.

Access to Document

10.1007/978-3-319-11487-3_41

Cite this

Arreaga-García, G., & Klapp, J. (2015). Accretion centers induced in a molecular cloud core after a penetrating collision. In J. Klapp, A. M. Ovando, A. L. Villa, L. D. G. Sigalotti, J. Klapp, G. R. Chavarria, & L. D. G. Sigalotti (Eds.), Selected Topics of Computational and Experimental Fluid Mechanics, 2013 (pp. 505-513). (Environmental Science and Engineering). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-319-11487-3_41

Arreaga-García, G. ; Klapp, J. / Accretion centers induced in a molecular cloud core after a penetrating collision. Selected Topics of Computational and Experimental Fluid Mechanics, 2013. editor / Jaime Klapp ; Abraham Medina Ovando ; Abel Lopez Villa ; Leonardo Di G. Sigalotti ; Jaime Klapp ; Gerardo Ruiz Chavarria ; Leonardo Di G. Sigalotti. Springer Berlin Heidelberg, 2015. pp. 505-513 (Environmental Science and Engineering).

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abstract = "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{\textquoteright}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.",

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Arreaga-García, G & Klapp, J 2015, Accretion centers induced in a molecular cloud core after a penetrating collision. in J Klapp, AM Ovando, AL Villa, LDG Sigalotti, J Klapp, GR Chavarria & LDG Sigalotti (eds), Selected Topics of Computational and Experimental Fluid Mechanics, 2013. Environmental Science and Engineering, Springer Berlin Heidelberg, pp. 505-513, International Enzo Levi Spring School and 19th National Congress of the Fluid Dynamics Division of the Mexican Physical Society, 2013, Jiutepec, Mexico, 13/11/15. https://doi.org/10.1007/978-3-319-11487-3_41

Accretion centers induced in a molecular cloud core after a penetrating collision. / Arreaga-García, G.; Klapp, J.
Selected Topics of Computational and Experimental Fluid Mechanics, 2013. ed. / Jaime Klapp; Abraham Medina Ovando; Abel Lopez Villa; Leonardo Di G. Sigalotti; Jaime Klapp; Gerardo Ruiz Chavarria; Leonardo Di G. Sigalotti. Springer Berlin Heidelberg, 2015. p. 505-513 (Environmental Science and Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Accretion centers induced in a molecular cloud core after a penetrating collision

AU - Arreaga-García, G.

AU - Klapp, J.

N1 - Publisher Copyright: © Springer International Publishing Switzerland 2015.

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

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U2 - 10.1007/978-3-319-11487-3_41

DO - 10.1007/978-3-319-11487-3_41

M3 - Contribución a la conferencia

SN - 9783319114866

T3 - Environmental Science and Engineering

SP - 505

EP - 513

BT - Selected Topics of Computational and Experimental Fluid Mechanics, 2013

A2 - Klapp, Jaime

A2 - Ovando, Abraham Medina

A2 - Villa, Abel Lopez

A2 - Sigalotti, Leonardo Di G.

A2 - Klapp, Jaime

A2 - Chavarria, Gerardo Ruiz

A2 - Sigalotti, Leonardo Di G.

PB - Springer Berlin Heidelberg

T2 - International Enzo Levi Spring School and 19th National Congress of the Fluid Dynamics Division of the Mexican Physical Society, 2013

Y2 - 13 November 2015 through 15 November 2015

ER -

Arreaga-García G, Klapp J. Accretion centers induced in a molecular cloud core after a penetrating collision. In Klapp J, Ovando AM, Villa AL, Sigalotti LDG, Klapp J, Chavarria GR, Sigalotti LDG, editors, Selected Topics of Computational and Experimental Fluid Mechanics, 2013. Springer Berlin Heidelberg. 2015. p. 505-513. (Environmental Science and Engineering). doi: 10.1007/978-3-319-11487-3_41

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

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