Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1010...82g&link_type=abstract
A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP Conference Proceedings, Volume 10
Physics
2
Photometric, Polarimetric, And Spectroscopic Instrumentation, Black Holes, Magnetohydrodynamics And Plasmas
Scientific paper
We have obtained optical and infrared photometry of the quiescent soft X-ray transient XTE J1118+480. In addition to optical and J-band variations, we present H- and Ks-band ellipsoidal variations for this system. We model the variations in all bands simultaneously with the WD98 light curve modeling code. The infrared colors of the secondary star in this system are consistent with those of a K7 V, while there is evidence for light from the accretion disk in the optical. Combining the models with the observed spectral energy distribution of the system, the most likely value for the orbital inclination angle is 68 °+/-2 °. This inclination angle corresponds to a primary black hole mass of 8.53+/-0.60 Msolar. Based on the derived physical parameters and infrared colors of the system, we determine a distance of 1.72+/-0.10 kpc to XTE J1118+480.
Balman Solen
Gelino Dawn M.
Kalemci Emrah
Kiziloglu Umit
Tomsick John A.
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