IAR   05382
INSTITUTO ARGENTINO DE RADIOASTRONOMIA
Unidad Ejecutora - UE
artículos
Título:
An inhomogeneous lepto-hadronic model for the radiation of relativistic jets. Application to XTE J1118+480
Autor/es:
GABRIELA S. VILA; GUSTAVO E. ROMERO; NICOLÁS A. CASCO
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Año: 2012 vol. 538 p. 97 - 97
ISSN:
0004-6361
Resumen:
Context. Conceptually reconstructing the physical conditions in
relativistic jets, given the observed electromagnetic spectrum, is a
complex inverse problem. We aim to improve our
understanding of the mechanisms operating in relativistic jets by
modeling their broadband electromagnetic spectrum. We
develop an inhomogeneous jet model where the injection of relativistic
primary and secondary particles takes place in a spatially extended
region. We calculate the contribution of all particles species to the
jet emissivity by several radiative processes, and assess the effect of
gamma-ray absorption in internal and external photon fields. A number of
specific models with different parameters are computed to explore the
possibilities of this scenario. We obtain a variety of
spectral shapes depending on the model parameters, some of them
predicting significant gamma-ray emission. The observed broadband
spectrum of the low-mass microquasar XTE J1118+480 can be satisfactorily
reproduced by the model. Our results indicate that
outbursts similar to those displayed in the past by XTE J1118+480 might
be detected with present-day gamma-ray instruments.