Photometric Periodicities of Be/X-ray Pulsars in the Small Magellanic Cloud

Abstract

Analysis of the longterm photometric variability of 7 Be/X-ray-pulsar systems in the Small Magellanic Cloud has been carried out. We find a variety of types of variability are present, including: longterm irregular changes, periodic orbital outbursts due to interaction between the stars (weeks to months), low-amplitude quasi-periodic variations of the equatorial disk (days), and nonradial pulsations of the Be primary star (hours). This is the first time nonradial pulsations have been identified in Be/X-ray binaries, although they were previously known in some single Be stars.

arXiv comment27 pages, 15 figures

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Cited by in corpus (13)

• High-Mass X-ray binaries in the Small Magellanic Cloud
• A Long Look at the Be/X-Ray Binaries of the Small Magellanic Cloud
• On the orbital parameters of Be/X-ray binaries in the Small Magellanic Cloud
• Very Long-term Optical Variability of High Mass X-ray Binaries in the SMC
• On the periodicities present in the optical light curves of SMC Be/X-ray binaries
• The Chandra survey of the SMC "Bar": II. Optical counterparts of X-ray sources
• Criteria for Dynamical Timescale Mass Transfer of Metal-poor Intermediate-mass Stars
• Discovery of a 26.2 day period in the long-term X-ray light curve of SXP 1323: a very short orbital period for a long spin period pulsar
• XMM-Newton observations of the Small Magellanic Cloud: XMMU J004814.1-731003, a 25.55 s Be/X-ray binary pulsar
• An Investigation of Be/X-ray Pulsars with OGLE-III Data
• Deep Chandra Survey of the Small Magellanic Cloud. II. Timing Analysis of X-ray Pulsars
• Spectral analysis of SXP59.0 during its 2017 outburst and properties of the soft excess in X-ray binary pulsars
• Non-radial pulsations in the Be/X binaries 4U0115+63 and SAXJ2103.5+4545