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Doppler and modulation tomography of XTE J1118+480 in quiescence

We present Doppler and modulation tomography of the X-ray nova XTE J1118+480 with data obtained during quiescence using the 10-m Keck II telescope. The hot spot where the gas stream hits the accretion disc is seen in H-Alpha, H-Beta, He I Lambda-5876, and Ca II Lambda-8662, thus verifying the presence of continued mass transfer within the system. The disc is clearly seen in H-Alpha and Ca II Lambda-8662. We image the mass-donor star in narrow absorption lines of Na I Lambda-Lambda-5890, 5896, 8183, 8195 and Ca II Lambda-8662, implying an origin from the secondary itself rather than the interstellar medium. We also detect deviations in the centroid of the double peak of H-Alpha akin to those found by Zurita et al. 2002 suggesting disc eccentricity.

preprint2009arXivOpen access
D. E. CalveloS. D. VrtilekD. SteeghsM. A. P. TorresJ. NeilsenA. V. FilippenkoJ. I. Gonzalez Hernandez
astro-ph.SR
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D. E. CalveloS. D. VrtilekD. SteeghsM. A. P. TorresJ. NeilsenA. V. FilippenkoJ. I. Gonzalez Hernandez

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