[SEMINARI] Radiative jet models for low-mass X-ray binaries, Gabriela Vila

Enric Marco Enric.Marco en uv.es
Mar Mar 11 12:58:19 CET 2014


Títol: Radiative jet models for low-mass X-ray binaries

  A càrrec de: Gabriela Vila. Instituto Argentino de Radioastronomía.

Divendres 21 de març a les 14:45.


Abstract: X-ray binaries (XRBs) are systems formed by a compact object
(a neutron star or a stellar-mass black hole) accreting from a
non-collapsed companion. In some X-ray binaries, a fraction of the
accretion flow is ejected from the surroundings of the compact object as
two collimated jets that may reach velocities close to the speed of
light. Such XRBs with jets are called microquasars.

     Microquasars emit electromagnetic radiation almost along the whole
spectrum, from radio to X-rays. A few of them have also been detected at
high and very high-energy gamma rays. It is usually accepted that the
gamma rays are produced by relativistic particles accelerated in situ in
the jets.

     In this talk, I will present the main features and results of a
lepto-hadronic model for the electromagnetic radiation of jets in
microquasars with low-mass companion stars. I will describe the channels
of interaction of relativistic particles with matter, radiation, and
magnetic field that are relevant under the physical conditions in the
jets. The output of these processes is a complex broadband radiative
spectrum. I will show the results of the model for some generic
scenarios and specific applications to two well-studied X-ray transients.

     Motivated by the growing volume and quality of the data available at
high and very high energies, I will focus on the predictions for the
gamma-ray band and the chances of detecting these sources in the near
future. Finally, I will briefly comment on the neutrino emission from
microquasar jets.

http://celeste.uv.es/daa/seminari.php.UTF8?id=1083

-- 
/------------------------------------\
Dr. Enric Marco
Departament d'Astronomia i Astrofísica
Facultat de Física
Universitat de València
C/  Dr. Moliner, 50
46100 Burjassot, Spain
Phone: (34)-96-354-3069
Fax:(34)-96-354-3084
enric.marco en uv.es
www.uv.es/marco
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