Extremely Weak Reflection Features in the X-ray Spectrum of XTE J1118+480: Possible Evidence for X-ray-Emitting Jets?

Abstract

We have simultaneously fit Chandra and RXTE spectra of the Galactic black hole XTE J1118+480 with three models for X-ray reflection. We explored a range of accretion disc ionizations (log(xi)=1-4; xi=L_X/nR^{2}) and iron abundances (0.10-1.00). Our fits with the constant density ionized disc models of Ross & Fabian indicate that less than 0.5 per cent (90 per cent confidence upper-limit) of the observed flux is reflected. Fits with the "pexrav" of model Magdziarz & Zdziarski indicate that the two-dimensional solid angle (Omega/2pi) subtended by the disc relative to a central source of incident hard X-rays is 0.01 +0.06 -0.01. A combination of the high inclination (i=81 degrees), Comptonization, and bulk velocities may each contribute to the low reflection fractions we have measured. The results are also consistent with extended jets being the source of the hard X-ray flux, as the disc would then represent a small solid angle as seen from the emission region.

Accepted for publication in MNRAS

References in corpus (6)

• Modeling the Low State Spectrum of the X-Ray Nova XTE J1118+480
• Complete and Simultaneous Spectral Observations of the Black-Hole X-ray Nova XTE J1118+480
• A Black Hole of > 6 Solar Masses in the X-ray Nova XTE J1118+480
• The Halo Black-Hole X-ray Transient XTE J1118+480
• Chandra High-Resolution Spectrum of the Anomalous X-ray Pulsar 4U 0142+61
• The effects of a comptonizing corona on the appearance of the reflection components in accreting black hole spectra

Cited by in corpus (19)

• Going with the flow: can the base of jets subsume the role of compact accretion disk coronae?
• A Long, Hard Look at the Low-Hard State in Accreting Black Holes
• Exploring the Role of Jets in the Radio/X-ray Correlations of GX339-4
• Correlations between X-ray and radio spectral properties of accreting black holes
• Aborted jets and the X-ray emission of radio-quiet AGNs
• The remarkable rapid X-ray, ultraviolet, optical, and IR variability in the black hole XTE J1118+480
• Multiwavelength observations revealing the evolution of the outburst of the black hole XTE J1118+480
• Constraining Jet/Disk Geometry and Radiative Processes in Stellar Black Holes XTE J1118+480 and GX 339-4
• Constraining X-ray Binary Jet Models via Reflection
• Simulated spectral states of AGN and observational predictions
• The fast spiral-in of the companion star to the black hole XTE J1118+480
• The return to the hard state of GX 339-4 as seen by Suzaku
• Study of the reflection spectrum of the accreting neutron star GX 3+1 using XMM-Newton and INTEGRAL
• Spectral and Temporal Behavior of the Black Hole Candidate XTE J1118+480 as Observed with BeppoSAX
• Exploring Accretion and Disk-Jet Connections in the LLAGN M81*
• Thermal emission from the stellar-mass black hole binary XTE J1118+480 in the low/hard state
• Properties of the Black Hole Candidate XTE J1118+480 with the TCAF solution during its Jet Activity Induced 2000 Outburst
• Correlating spectral and timing properties in the evolving jet of the micro blazar MAXI J1836-194
• Physical mechanisms that shape the morphologies of extragalactic jets