X-ray emission from fast moving shocks in the protostellar jet HH 154: a binding diagnostic of the emission mechanism
- Authors: Favata, Fabio; Micela, Giuseppina; Fridlund, Malcolm; Bonito, Rosaria; Orlando, Salvatore; Peres, Giovanni; Harnden, F. R
- Publication year: 2004
- Type: Altro
- Key words: hydrodynamics – Herbig-Haro objects – ISM: jets and outflows – X-rays: ISM
- OA Link: http://hdl.handle.net/10447/85413
Abstract
We propose to determine the proper motion of the X-ray source associated with HH 154, the only known protostellar jet in which the X-ray emission mechanism can be studied in detail. Our numerical simulations indicate that the X-rays are produced in a fast-moving (500 km/s) post-shock region, and our HST observations show high proper motion shocked material moving at similar speed. Detection (or lack of) of proper motion of the X-ray source will strongly confirm (or falsify) our model, and constitute the basis for a general theory of X-ray emission in protostellar jets. Understanding and modeling the emission mechanism is key to assess the lifetime of the X-ray emission and thus the influence of X-ray from protostellar jets on the star (and planetary) formation process in general.