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.
Referencia bibliográfica

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

Fecha de publicación:
10
2009
Número de autores
7
Número de autores del IAC
0
Número de citas
27
Número de citas referidas
27
Descripción
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.