期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 399, 期 2, 页码 539-549出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1365-2966.2009.15304.x
关键词
accretion; accretion discs; binaries: close; stars: individual: XTE J1118+480
资金
- W. M. Keck Foundation
- NSF [AST-0507637, AST-0607485]
- European Commission [MEXT-CT-2004-014265]
- STFC [PP/D005914/1, ST/F002599/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D005914/1, ST/F002599/1] Funding Source: researchfish
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 hotspot 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. suggesting disc eccentricity.
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