The impact of precession on the observed population of ULXs

Khan N, Middleton MJ, Wiktorowicz G, Dauser T, Roberts TP, Wilms J (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Monthly Notices of the Royal Astronomical Society Oxford University Press

Book Volume: 509

Pages Range: 2493-2506

Journal Issue: 2

DOI: 10.1093/mnras/stab3049

Abstract

The discovery of neutron stars (NSs) powering several ultraluminous X-ray sources (ULXs) raises important questions about the nature of the underlying population. In this paper, we build on previous work studying silated populations by incorporating a model where the emission originates from a precessing, geometrically beamed wind-cone, created by a supercritical inflow. We obtain estimates - independent of the prescription for the precession period of the wind - for the relative number of ULXs that are potentially visible (persistent or transient) for a range of underlying factors such as the relative abundance of black holes or NSs within the population, maxim precessional angle, and low-mass X-ray binary duty cycle. We make initial comparisons to existing data using a catalogue compiled from XMM-Newton. Finally, based on estimates for the precession period, we deteine how the eROSITA all-sky survey (eRASS) will be able to constrain the underlying demographic.

Authors with CRIS profile

Thomas Dauser Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Jörn Wilms Lehrstuhl für Astronomie und Astrophysik

Involved external institutions

University of Southampton GB United Kingdom (GB) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Durham University GB United Kingdom (GB)

How to cite

APA:

Khan, N., Middleton, M.J., Wiktorowicz, G., Dauser, T., Roberts, T.P., & Wilms, J. (2022). The impact of precession on the observed population of ULXs. Monthly Notices of the Royal Astronomical Society, 509(2), 2493-2506. https://dx.doi.org/10.1093/mnras/stab3049

MLA:

Khan, Norman, et al. "The impact of precession on the observed population of ULXs." Monthly Notices of the Royal Astronomical Society 509.2 (2022): 2493-2506.

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