Spectroscopic diagnostics of precessing discs: The stream-disc impact in XTEJ1118+480 (= KV UMA) in outburst

Authors

C. A. Haswell, The Open University
S. B. Foulkes, The Open University
D. J. Rolfe, The Open University
J. R. Murray, University of Leicester
G. H. Tovmassian, Universidad Nacional Autónoma de México
S. V. Zharikov, Universidad Nacional Autónoma de México
P. F.L. Maxted, Keele University
R. North, University of Southampton
P. A. Charles, University of Southampton
R. I. Hynes, University of Southampton

Document Type

Conference Proceeding

Publication Date

1-1-2004

Abstract

We present orbital trailed spectrograms of XTEJ1118+480 taken at the rise to outburst maximum in 2000. These show an evolving S-wave feature arising from the stream impact on the edge of the eccentric precessing disc. By comparing the observed S-waves with those generated in an SPH simulation, we deduce the disc precession phases corresponding to our observations. Hence we infer changes in the disc precession period around the outburst maximum: taken at face value our spectroscopy suggests a precession period temporarily as short as 20 days. © Copyright 2004: IA, UNAM.

Publication Source (Journal or Book title)

Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias

First Page

160

Last Page

161

Recommended Citation

Haswell, C., Foulkes, S., Rolfe, D., Murray, J., Tovmassian, G., Zharikov, S., Maxted, P., North, R., Charles, P., & Hynes, R. (2004). Spectroscopic diagnostics of precessing discs: The stream-disc impact in XTEJ1118+480 (= KV UMA) in outburst. Revista Mexicana de Astronomia y Astrofisica: Serie de Conferencias, 20, 160-161. https://doi.org/10.1017/s0252921100152303