Potential kick velocity distribution of black hole X-ray binaries and implications for natal kicks
MetadataShow full item record
Funding and Sponsorship
Copyright © 2019 The American Astronomical Society. All rights reserved.
© 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.
Showing items related by title, author, creator and subject.
Russell, D.; Markoff, S.; Casella, P.; Cantrell, A.; Chatterjee, R.; Fender, R.; Gallo, E.; Gandhi, P.; Homan, J.; Maitra, D.; Miller-Jones, James; O'Brien, K.; Shahbaz, T. (2013)In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to ?-ray energies, the contribution of the jet is debated. The total luminosity, and hence power of the ...
Miller-Jones, James; Jonker, P.; Nelemans, G.; Portegies Zwart, S.; Dhawan, V.; Brisken, W.; Gallo, E.; Rupen, M. (2009)Using new and archival radio data, we have measured the proper motion of the black hole X-ray binary V404 Cyg to be 9.2 ± 0.3 mas yr-1. Combined with the systemic radial velocity from the literature, we derive the full ...
Plotkin, Richard; Gallo, E.; Jonker, P. (2013)Most transient black hole X-ray binaries (BHXBs) spend the bulk of their time in a quiescent state, where they accrete matter from their companion star at highly sub-Eddington luminosities (we define quiescence here as a ...