Doppler and modulation tomography of XTEJ1118+480 in quiescence

Calvelo, D. E.; Vrtilek, S. D.; Steeghs, D.; Torres, M. A. P.; Neilsen, J.; Filippenko, A. V.; González Hernández, J. I.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 399, Issue 2, pp. 539-549.

Advertised on:
10
2009
Number of authors
7
IAC number of authors
0
Citations
27
Refereed citations
27
Description
We present Doppler and modulation tomography of the X-ray nova XTEJ1118+480 with data obtained during quiescence using the 10-m Keck II telescope. The hotspot where the gas stream hits the accretion disc is seen in Hα, Hβ, HeI λ5876 and CaII λ8662, thus verifying the presence of continued mass transfer within the system. The disc is clearly seen in Hα and CaII λ8662. We image the mass-donor star in narrow absorption lines of NaI λλ5890, 5896, 8183, 8195 and CaII λ8662, implying an origin from the secondary itself rather than the interstellar medium. We also detect deviations in the centroid of the double peak of Hα akin to those found by Zurita et al. suggesting disc eccentricity.