A possible black hole in the γ-ray microquasar LS 5039

  title={A possible black hole in the $\gamma$-ray microquasar LS 5039},
  author={Jorge Casares and Marc Rib{\'o} and Ignasi Ribas and Josep Maria Paredes and Jos{\'e}-Mar{\'i}a Mart{\'i} and Artemio Herrero},
  journal={Monthly Notices of the Royal Astronomical Society},
The population of high-energy and very high-energy γ-ray sources, detected with EGRET and the new generation of ground-based Cherenkov telescopes, forms a reduced but physically important sample. Most of these sources are extragalactic (e.g. blazars), while among the galactic ones there are pulsars and supernova remnants. The microquasar LS 5039, previously proposed to be associated with an EGRET source by Paredes et al., has recently been detected at TeV energies, confirming that microquasars… 

Figures and Tables from this paper

Spectral and Variability Properties of LS 5039 from Radio to very High-Energy Gamma-Rays
Microquasars are X-ray binaries with relativistic jets. The microquasar LS 5039 turned out to be the first high-energy gamma-ray microquasar candidate due to its likely association with the EGRET
Spectral 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
Modeling Gamma-Ray Emission From the High-Mass X-Ray Binary LS 5039
A few high-mass X-ray binaries–consisting of an OB star plus compact com panion–have been observed by Fermi and ground-based Cerenkov telescopes like High Energy Stereoscopic System (HESS) to be
Looking into the heart of a beast: The black hole binary LS 5039
LS 5039 is a relatively close microquasar consisting of a late O-type star and a compact object (very possibly a black hole) on a highly eccentric orbit with a period of 3.9 days. The high X-ray,
Discovery of the 3.9 days orbital periodicity in Very High Energy γ -rays
Recent observations of the binary system LS 5039 with the High Energy Stereoscopic System (H.E.S.S.) re- vealed that its Very High Energy (VHE) γ -ray emission is modulated at the 3.9 days orbital
Microquasars are X-ray binaries with relativistic jets. These jets are powerful energy carriers — thought to be fed by accretion — which produce nonthermal emission at different energy bands. The
Sign of Hard-X-Ray Pulsation from the γ-Ray Binary System LS 5039.
The results suggest that the highly efficient particle acceleration process, known to be operating in LS 5039, emerges through interactions between dense stellar winds from the massive primary star, and ultrastrong magnetic fields of the magnetar.
Propagation of very high energy γ‐rays inside massive binaries LS 5039 and LSI +61○ 303
Two massive binary systems of the microquasar type, LS 5039 and LSI +61° 303, have been suggested as possible counterparts of EGRET sources. LS 5039 has also been recently detected in TeV γ-rays.
Microquasar LS 5039: a TeV gamma-ray emitter and a potential TeV neutrino source
The recent detection of TeV γ-rays from the microquasar LS 5039 by HESS is one of the most exciting discoveries of observational gamma-ray astronomy in the very high energy regime. This result
Constraints on the geometry of the VHE emission in LS 5039 from photon photon deabsorption
Abstract Evidence for orbital modulation of the very high energy (VHE) γ-ray emission from the high-mass X-ray binary and microquasar LS 5039 has recently been reported by the HESS collaboration. The


The Orbit of the Massive X-Ray Binary LS 5039
We present the first spectroscopic orbit for the massive X-ray binary LS 5039, which we find to be a short-period (P = 4.117 ± 0.011 days) and highly eccentric (e = 0.41 ± 0.05) system. The low-mass
Orbital X-Ray Variability of the Microquasar LS 5039
The properties of the orbit and the donor star in the high-mass X-ray binary microquasar LS 5039 indicate that accretion processes should mainly occur via a radiatively driven wind. In such a
The N Enrichment and Supernova Ejection of the Runaway Microquasar LS 5039
We present an investigation of new optical and ultraviolet spectra of the mass donor star in the massive X-ray binary LS 5039. The optical band spectral line strengths indicate that the atmosphere is
On the radio emitting high mass X-ray binary LS 5039
We present new optical { near{IR spectroscopic and photometric observations of the newly discovered galactic microquasar LS 5039, which indicate a classication for the mass donor in the system of
LS 5039: A runaway microquasar ejected from the galactic plane
We have compiled optical and radio astrometric data of the microquasar LS 5039 and derived its proper motion. This, together with the distance and radial velocity of the system, allows us to state
Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2 1450
We report on the results of the spectral and timing analysis of a BeppoSAX observation of the microquasar system LS 5039/RX J1826.2−1450. The source was found in a low-flux state with FX(1-10 keV)=
Sources of Relativistic Jets in the Galaxy
▪ Abstract Black holes of stellar mass and neutron stars in binary systems are first detected as hard X-ray sources using high-energy space telescopes. Relativistic jets in some of these compact
Discovery of a high-energy gamma-ray-emitting persistent microquasar
The star LS 5039 is a new microquasar system with apparent persistent ejection of relativistic plasma at a 3-kiloparsec distance from the sun and may be associated with a gamma-ray source discovered by the Energetic Gamma Ray Experiment Telescope (EGRET) on board the COMPTON-Gamma Ray Observatory satellite.
Discovery of Very High Energy Gamma Rays Associated with an X-ray Binary
Evidence for gamma-ray emission of >100 gigaelectron volts from a candidate microquasar, LS 5039, is found, showing that particles are also accelerated to very high energies in these systems.
Physical parameters of the high-mass X-ray binary 4U1700-37
We present the results of a detailed non-LTE analysis of the ultraviolet and optical spectrum of the O6.5 Iaf + star HD 153919 - the mass donor in the high-mass X-ray binary 4U1700-37. We find that