Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...424l...1b&link_type=abstract
Astronomy and Astrophysics, v.424, p.L1-L4 (2004)
Astronomy and Astrophysics
Astrophysics
16
Ism: Herbig-Haro Objects, Ism: Individual Objects: Hh 154, Ism: Jets And Outflows, X-Rays: Ism
Scientific paper
We study the mechanism causing the X-ray emission recently detected in protostellar jets, by performing a detailed modeling of the interaction between a supersonic jet originating from a young stellar object and the ambient medium, for various values of density contrast, ν, between the ambient density and the jet, and of Mach number, M; radiative losses and thermal conduction have been taken into account. Here we report a representative case which reproduces, without any ad hoc assumption, the characteristics of the X-ray emission recently observed in the protostellar jet HH 154. We find that the X-ray emission originates from a localized blob, consistent with observations, which moves with velocity v ˜ 500 km s-1; we therefore predict the X-ray source to have a detectable proper motion.
Bonito Rosaria
Favata Fabio
Orlando Salvatore
Peres Giovanni
Rosner Robert
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