LS I +61 303: MICROQUASAR OR NOT MICROQUASAR?
نویسندگان
چکیده
منابع مشابه
Orbital Parameters of the Microquasar LS I + 61 303
New optical spectroscopy of the HMXB microquasar LS I +61 303 is presented. Eccentric orbital fits to our radial velocity measurements yield updated orbital parameters in good agreement with previous work. Our orbital solution indicates that the periastron passage occurs at radio phase 0.23 and the X-ray/radio outbursts are triggered 2.5–4 days after the compact star passage. The spectrum of th...
متن کاملVariable very-high-energy gamma-ray emission from the microquasar LS I +61 303.
Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics of relativistic jets. We report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LS I 61 + 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, which sug...
متن کاملA Time-dependent Leptonic Model for Microquasar Jets: Application to Ls I 61 303
The Galactic high-mass X-ray binary and jet source (microquasar) LS I 61 303 has recently been detected at TeV g-ray energies by the MAGIC telescope. We have applied a time-dependent leptonic jet model to the broadband spectral energy distribution (SED), and we have suggested (although not unambiguously detected) an orbital modulation of the very high energy (VHE) g-ray emission of this source....
متن کاملHadronic High-energy Gamma-ray Emission from the Microquasar Ls I +61 303
We present a hadronic model for gamma-ray production in the microquasar LS I +61 303. The system is formed by a neutron star that accretes matter from the dense and slow equatorial wind of the Be primary star. We calculate the gamma-ray emission originated in pp interactions between relativistic protons in the jet and cold protons from the wind. After taking into account opacity effects on the ...
متن کاملDENSITY AND VELOCITY STRUCTURE OF THE Be STAR EQUATORIAL DISK IN THE BINARY LS I +61 303, A PROBABLE MICROQUASAR
We explore a new method for investigating the density and velocity structure of the Be star equatorial disk in LS I +61 303, based on its variable radio emission. At a particular radius the method yields a circularly shaped solution locus in the radial (vr) and circular (vc) components of the disk gas velocity, which allows us to set limits on vr and vc at that radius. For a given model of the ...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2008
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271808013510