The angular momentum of condensations within elephant trunks

Details The angular momentum of condensations within elephant trunks The angular momentum of condensations within elephant trunks

2009-06-23

arxiv.org/abs/0906.4368v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 7 figures, accepted in Astronomy and Astrophysics

Scientific paper

The radiation from newly born stars photoevaporates their parental neutral cloud, leading to the formation of dense clumps that will eventually form stars. We present 3D simulations of the interaction of a neutral cloud with an external ionising radiation field, and compute the angular momenta of these collapsing clumps. The angular momenta of these collapsing clumps show that they have preferential orient mostly perpendicular to the direction of the incident ionising photon field. Therefore, the axes of the jet systems that will be eventually ejected (from the star + accretion disk systems that will form) will be oriented approximately perpendicular to the direction to the photoionising source.

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