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.
Favata, F., Micela, G., Fridlund, M., Bonito, R., Orlando, S., Peres, G., et al. (2004). X-ray emission from fast moving shocks in the protostellar jet HH 154: a binding diagnostic of the emission mechanism [Altro].
X-ray emission from fast moving shocks in the protostellar jet HH 154: a binding diagnostic of the emission mechanism
BONITO, Rosaria;PERES, Giovanni;
2004-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.