Search for intermittent X-ray pulsations from neutron stars in low-mass X-ray binaries

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Bahar, Yunus Emre and Chakraborty, Manoneeta and Göğüş, Ersin (2021) Search for intermittent X-ray pulsations from neutron stars in low-mass X-ray binaries. Publications of the Astronomical Society of Australia, 38 . ISSN 1323-3580 (Print) 1448-6083 (Online)

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Abstract

We present the results of our extensive binary orbital motion corrected pulsation search for 13 low-mass X-ray binaries. These selected sources exhibit burst oscillations in X-rays with frequencies ranging from 45 to 1 122 Hz and have a binary orbital period varying from 2.1 to 18.9 h. We first determined episodes that contain weak pulsations around the burst oscillation frequency by searching all archival Rossi X-ray Timing Explorer data of these sources. Then, we applied Doppler corrections to these pulsation episodes to discard the smearing effect of the binary orbital motion and searched for recovered pulsations at the second stage. Here we report 75 pulsation episodes that contain weak but coherent pulsations around the burst oscillation frequency. Furthermore, we report eight new episodes that show relatively strong pulsations in the binary orbital motion corrected data.
Item Type: Article
Uncontrolled Keywords: Methods: data analysis; Stars: neutron; X-rays: binaries; X-rays: stars
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Ersin Göğüş
Date Deposited: 17 Aug 2022 15:36
Last Modified: 17 Aug 2022 15:36
URI: https://research.sabanciuniv.edu/id/eprint/43332

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