THE ORBITS OF THE γ-RAY BINARIES LS I +61 303 AND LS 5039
نویسندگان
چکیده
منابع مشابه
High-energy Γ-ray Emission from Microquasars: Ls 5039 and Ls I +61 303
The possible associations between the microquasars LS 5039 and LS I +61 303 and the EGRET sources 3EG J1824−1514 and 3EG J0241+6103 suggest that microquasars could also be sources of high-energy γ-rays. In this work, we present a detailed numerical inverse Compton (IC) model, based on a microquasar scenario, that reproduces the high-energy γ-ray spectra and variability observed by EGRET for the...
متن کاملMulti-wavelength (radio, X-ray and Γ-ray) Observations of the Γ-ray Binary Ls I +61 303
We present the results of the first multiwavelength observing campaign on the high-mass X-ray binary LS I +61303 comprising observations at the TeV regime with the MAGIC telescope, along with X-ray observations with Chandra, and radio interferometric observations with the MERLIN, EVN and VLBA arrays, in October and November 2006. From our MERLIN observations, we can exclude the existence of lar...
متن کاملSpectral energy distribution of the γ - ray microquasar LS 5039
The microquasar LS 5039 has recently been detected as a source of very high energy (VHE) γ-rays. This detection, that confirms the previously proposed association of LS 5039 with the EGRET source 3EG J1824−1514, makes of LS 5039 a special system with observational data covering nearly all the electromagnetic spectrum. In order to reproduce the observed spectrum of LS 5039, from radio to VHE γ-r...
متن کاملOrbital 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 کاملNewton observation of a spectral state transition in the peculiar radio / X – ray / γ – ray source LS I + 61 303
We report the results of XMM-Newton and BeppoSAX observations of the radio and X–ray emitting star LS I +61 303, likely associated with the gamma-ray source 2CG 135+01 and recently detected also at TeV energies. The data include a long XMM-Newton pointing carried out in January 2005, which provides the deepest look ever obtained for this object in the 0.3–12 keV range. During this observation t...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/698/1/514