Doppler and modulation tomography of XTE J1118+480 in quiescence

被引：27

作者：

Calvelo, D. E. ^{[1
,2
]}

Vrtilek, S. D. ^{[1
]}

Steeghs, D. ^{[1
,3
]}

Torres, M. A. P. ^{[1
]}

Neilsen, J. ^{[1
,4
]}

Filippenko, A. V. ^{[5
]}

Hernandez, J. I. Gonzalez ^{[6
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[4] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA

[5] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[6] GEPI, Observ Paris Meudon, F-92195 Meudon, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2009年 / 399卷 / 02期

关键词：

accretion; accretion discs; binaries: close; stars: individual: XTE J1118+480; X-RAY TRANSIENT; BLACK-HOLE; ACCRETION DISC; GALACTIC HALO; XTE-J1118+480; OUTBURST; SPECTROSCOPY; SUPERHUMPS; A0620-00; BINARY;

D O I：

10.1111/j.1365-2966.2009.15304.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：539 / 549

页数：11

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