High-energy Γ-ray Emission from Microquasars: Ls 5039 and Ls I +61 303

نویسنده

  • J. M. Paredes
چکیده

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 mentioned sources. Our model considers a population of relativistic electrons entrained in a cylindrical inhomogeneous jet that interact through IC scattering with both the radiation and the magnetic fields.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

GeV - TeV gamma - ray light curves expected in the IC e ± pair cascade model for massive binaries : Application to LS 5039

Context. TeV gamma-ray emission from two massive binaries of the microquasar type, LS 5039 and LS I +61o 303, show clear variability with their orbital periods. Aims. Our purpose is to calculate the GeV and TeV γ-ray light curves from the massive binary LS 5039 which are expected in the specific Inverse Compton e pair cascade model. This model successfully predicted the basic features of the hi...

متن کامل

Time-dependent Synchrotron and Compton Spectra from Microquasar Jets

Jet models for the high-energy emission of Galactic X-ray binary sources have regained significant interest with detailed spectral and timing studies of the X-ray emission from microquasars, the recent detection by the HESS collaboration of very-high-energy $\gamma$-rays from the microquasar LS~5039, and the earlier suggestion of jet models for ultraluminous X-ray sources observed in many nearb...

متن کامل

ar X iv : a st ro - p h / 05 12 16 2 v 1 6 D ec 2 00 5 Gamma Rays from Compton Scattering in the Jets of Microquasars : Application to LS 5039

Recent High Energy Stereoscopic System (HESS) observations show that microquasars in high-mass systems are sources of very high energy γ-rays. A leptonic jet model for microquasar γ-ray emission is developed. Using the head-on approximation for the Compton cross section and taking into account angular effects from the star’s orbital motion, we derive expressions to calculate the spectrum of γ r...

متن کامل

Gamma Rays from Compton Scattering in the Jets of Microquasars: Application to Ls 5039

Recent High Energy Stereoscopic System (HESS) observations show that microquasars in highmass systems are sources of very high energy γ-rays. A leptonic jet model for microquasar γ-ray emission is developed. Using the head-on approximation for the Compton cross section and taking into account angular effects from the star’s orbital motion, we derive expressions to calculate the spectrum of γ ra...

متن کامل

Propagation of very high energy gamma - rays inside massive binaries LS 5039 and LSI + 61 o 303

Two massive binary systems of the microquasar type, LS 5039 and LSI +61 o 303, have been suggested as possible counterparts of EGRET sources. LS 5039 has been also recently detected in TeV gamma-rays. Since the massive stars in these binary systems are very luminous, it is expected that high energy gamma-rays, if injected relatively close to the massive stars, should be strongly absorbed, initi...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004