Numerical Models of Externally Irradiated Herbig-Haro Objects
Por:
Estrella-Trujillo, D., Velazquez, P. F., Raga, A. C., Esquivel, A.
Publicada:
1 sep 2021
Resumen:
We use 3D radiation-hydrodynamic simulations to study the effects of an
external photoionization source on the structure of a Herbig-Haro (HH)
jet launched from a young stellar object. Different ionizing photon
rates are considered as well as a time-dependent ejection velocity and
density. From our numerical results, synthetic H alpha emission maps are
computed in order to study how the external ionizing source affects the
observed morphology of the jet and counterjet. We find that, as
expected, the outflow has jet/counterjet and side-to-side asymmetries
(with brighter H alpha emission toward the external photoionizing
source). We find that, for a variable ejection velocity, jet
morphologies similar to different observed externally irradiated jets
can be straightforwardly obtained. Models of jets with a variable
ejection density (and constant outflow velocity) produce morphologies
that are not seen in observed HH jets and are, therefore, not justified
by the presently available observations.
Bronze
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