HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Optical and Near-Infrared Spectroscopy of the Black Hole Swift J1753.5-0127

Abstract : We report on a multiwavelength observational campaign of the black hole X-ray binary Swift J1753.5-0127 that consists of an ESO/X-shooter spectrum supported by contemporaneous Swift/XRT+UVOT and ATCA data. ISM absorption lines in the X-shooter spectrum allows us to determine E(B-V)=0.45+/-0.02 along the line-of-sight to the source. We also report detection of emission signatures of He II at 4686 angstrom, H alpha, and, for the first time, H I at 10906 angstrom and Paschen Beta. The double-peaked morphology of these four lines is typical of the chromosphere of a rotating accretion disk. Nonetheless, the paucity of disk features points towards a low level of irradiation in the system. This is confirmed through spectral energy distribution modeling and we find that the UVOT+X-shooter continuum mostly stems from the thermal emission of a viscous disk. We speculate that the absence of reprocessing is due to the compactness of an illumination-induced envelope that fails to reflect enough incoming hard X-ray photons back to the outer regions. The disk also marginally contributes to the Compton-dominated X-ray emission and is strongly truncated, with an inner radius about a thousand times larger than the black hole's gravitational radius. A near-infrared excess is present, and we associate it with synchrotron radiation from a compact jet. However, the measured X-ray flux is significantly higher than what can be explained by the optically thin synchrotron jet component. We discuss these findings in the framework of the radio quiet versus X-ray bright hypothesis, favoring the presence of a residual disk, predicted by evaporation models, that contributes to the X-ray emission without enhancing the radio flux.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-01343963
Contributor : Nathalie Rouchon Connect in order to contact the contributor
Submitted on : Thursday, May 18, 2017 - 11:00:31 AM
Last modification on : Monday, May 16, 2022 - 8:20:23 AM

File

Rahoui_2015_ApJ_810_161.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Farid Rahoui, John A. Tomsick, Mickael Coriat, Stéphane Corbel, Felix Fürst, et al.. Optical and Near-Infrared Spectroscopy of the Black Hole Swift J1753.5-0127. The Astrophysical journal letters, Bristol : IOP Publishing, 2015, 810 (2), pp.161. ⟨10.1088/0004-637X/810/2/161⟩. ⟨insu-01343963⟩

Share

Metrics

Record views

432

Files downloads

144