Patruno, A., Wette, K. and Messenger, C. (2018) A deep pulse search in 11 low mass X-ray binaries. Astrophysical Journal, 859(2), 112. (doi: 10.3847/1538-4357/aabf89)
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Abstract
We present a systematic coherent X-ray pulsation search in 11 low mass X-ray binaries (LMXBs). We select a relatively broad variety of LMXBs, including persistent and transient sources, spanning orbital periods between 0.3 and 17 hr. We use about 3.6 Ms of data collected by the Rossi X-Ray Timing Explorer and XMM-Newton and apply a semi-coherent search strategy to look for weak and persistent pulses in a wide spin frequency range. We find no evidence for X-ray pulsations in these systems and consequently set upper limits on the pulsed sinusoidal semi-amplitude below 1.6% for ten outbursting/persistent LMXBs and 6% for a quiescent system; the upper limits are further refined, by searching a narrower parameter space around the outliers, down to 0.14%-0.78% and 2.9%, respectively. These results suggest that weak pulsations might not form in (most) non pulsating LMXBs.
Item Type: | Articles |
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Additional Information: | A.P. acknowledges support from a Netherlands Organization for Scientific Research (NWO) Vidi Fellowship. K.W. acknowledges support from ARC CE170100004. |
Keywords: | Binaries: general, stars: neutron, stars: rotation, X-rays: binaries, X-rays: stars. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Messenger, Dr Christopher |
Authors: | Patruno, A., Wette, K., and Messenger, C. |
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
Research Group: | Institute for Gravitational Research |
Journal Name: | Astrophysical Journal |
Publisher: | American Astronomical Society |
ISSN: | 0004-637X |
ISSN (Online): | 1538-4357 |
Published Online: | 30 May 2018 |
Copyright Holders: | Copyright © 2018 The American Astronomical Society |
First Published: | First published in Astrophysical Journal 859(2): 112 |
Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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