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Multiband echo tomography of Sco X-1

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Muñoz-Darias, T., Martínez-Paris, I. G., Casares, J., Marsh, T. R., Cornelisse, R., Steeghs, D., Dhillon, V. S. and Charles, P. A.. (2006) Multiband echo tomography of Sco X-1. Advances in space research, No.38 (Vol.12). pp. 2762-2764. ISSN 0273-1177

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Official URL: http://dx.doi.org/10.1016/j.asr.2005.10.056

Abstract

We present preliminary results of a simultaneous X-ray/optical campaign of the prototypical LMXB Sco X-1 at 1-10 Hz time resolution. Lightcurves of the high excitation Bowen/Hell emission lines and a red continuum at lambda(c) similar to 6000 angstrom were obtained through narrow interference filters with ULTRACAM, and these were cross-correlated with simultaneous RXTE X-ray lightcurves. We find evidence for correlated variability, in particular when Sco X-1 enters the Flaring branch. The Bowen/Hell lightcurves lag the X-ray lightcurves with a light travel time which is consistent with reprocessing in the companion star while the continuum lightcurves have shorter delays consistent with reprocessing in the accretion disc.

Item Type:

Journal Article

Subjects:

Q Science > QB Astronomy

Divisions:

Faculty of Science > Physics

Library of Congress Subject Headings (LCSH):

Double stars

Journal or Publication Title:

Advances in space research

Publisher:

Elsevier Science BV

ISSN:

0273-1177

Official Date:

2006

Dates:

Date	Event
2006	Published

Volume:

No.38

Number:

Vol.12

Number of Pages:

Page Range:

pp. 2762-2764

Identification Number:

10.1016/j.asr.2005.10.056

Status:

Peer Reviewed

Publication Status:

Published

Access rights to Published version:

Restricted or Subscription Access

References:

[1] Casares J., Charles P.A. & Kuulkers E. 1998, ApJ, 493, L39.
[2] Dhillon V.S. & Marsh T.R. 2001, NewA Rev., 45(1-2), 91.
[3] Munoz-Darias T., Martınez-Pais I.G. & Casares J. 2005, in INTERACTING
BINARIES: Accretion, Evolution and Outcomes, eds. L.A. Antonelli et al.
[4] O’Brien K., Horne K., Hynes R.I., Chen W., Haswell C.A. & Still M.D. 2002,
MNRAS, 334, 426.
[5] Steeghs D. & Casares J. 2002, ApJ, 568, 273.

URI:

http://wrap.warwick.ac.uk/id/eprint/32620

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