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    Potential kick velocity distribution of black hole X-ray binaries and implications for natal kicks

    80258.pdf (6.477Mb)
    Access Status
    Open access
    Authors
    Atri, P.
    Miller-Jones, James
    Bahramian, Arash
    Plotkin, Richard
    Jonker, P.G.
    Nelemans, G.
    Maccarone, T.J.
    Sivakoff, G.R.
    Deller, A.T.
    Chaty, S.
    Torres, M.A.P.
    Horiuchi, S.
    McCallum, J.
    Natusch, T.
    Phillips, C.J.
    Stevens, J.
    Weston, S.
    Date
    2019
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Atri, P. and Miller-Jones, J.C.A. and Bahramian, A. and Plotkin, R.M. and Jonker, P.G. and Nelemans, G. and Maccarone, T.J. et al. 2019. Potential kick velocity distribution of black hole X-ray binaries and implications for natal kicks. Monthly Notices of the Royal Astronomical Society. 489 (3): pp. 3116-3134.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stz2335
    ISSN
    0035-8711
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT140101082
    Remarks

    Copyright © 2019 The American Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/80176
    Collection
    • Curtin Research Publications
    Abstract

    © 2019 The Author(s). We use very long baseline interferometry to measure the proper motions of three black hole X-ray binaries (BHXBs). Using these results together with data from the literature and Gaia DR2 to collate the best available constraints on proper motion, parallax, distance, and systemic radial velocity of 16 BHXBs, we determined their three-dimensional Galactocentric orbits. We extended this analysis to estimate the probability distribution for the potential kick velocity (PKV) a BHXB system could have received on formation. Constraining the kicks imparted to BHXBs provides insight into the birth mechanism of black holes (BHs). Kicks also have a significant effect on BH-BH merger rates, merger sites, and binary evolution, and can be responsible for spin-orbit misalignment in BH binary systems. 75 per cent of our systems have potential kicks> 70 km s-1. This suggests that strong kicks and hence spin-orbitmisalignment might be common among BHXBs, in agreement with the observed quasi-periodic X-ray variability in their power density spectra. We used a Bayesian hierarchical methodology to analyse the PKV distribution of the BHXB population, and suggest that a unimodal Gaussian model with a mean of 107 ± 16 km s-1 is a statistically favourable fit. Such relatively high PKVs would also reduce the number of BHs likely to be retained in globular clusters. We found no significant correlation between the BH mass and PKV, suggesting a lack of correlation between BH mass and the BH birth mechanism. Our PYTHON code allows the estimation of the PKV for any system with sufficient observational constraints.

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