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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2021

Measuring the distance to the black hole candidate X-ray binary MAXI J1348–630 using H I absorption

J. Chauhan
  • Function : Author
J.C.A. Miller-Jones
  • Function : Author
W. Raja
  • Function : Author
J.R. Allison
  • Function : Author
P.F.L. Jacob
  • Function : Author
G.E. Anderson
  • Function : Author
R. Fender
  • Function : Author
A. Hotan
  • Function : Author
M. Whiting
P.A. Woudt
  • Function : Author
B. Koribalski
  • Function : Author
E. Mahony
  • Function : Author

Abstract

We present neutral hydrogen (H i) absorption spectra of the black hole candidate X-ray binary (XRB) MAXI J1348–630 using the Australian Square Kilometre Array Pathfinder (ASKAP) and MeerKAT. The ASKAP H i spectrum shows a maximum negative radial velocity (with respect to the local standard of rest) of −31 ± 4 km s^−1 for MAXI J1348–630, as compared to −50 ± 4 km s^−1 for a stacked spectrum of several nearby extragalactic sources. This implies a most probable distance of |$2.2^{+0.5}_{-0.6}$| kpc for MAXI J1348–630, and a strong upper limit of the tangent point distance at 5.3 ± 0.1 kpc. Our preferred distance implies that MAXI J1348–630 reached 17 ± 10  per cent of the Eddington luminosity at the peak of its outburst, and that the source transited from the soft to the hard X-ray spectral state at 2.5 ± 1.5  per cent of the Eddington luminosity. The MeerKAT H i spectrum of MAXI J1348–630 (obtained from the older, low-resolution 4k mode) is consistent with the re-binned ASKAP spectrum, highlighting the potential of the eventual capabilities of MeerKAT for XRB spectral line studies.
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Dates and versions

hal-03034733 , version 1 (23-03-2023)

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J. Chauhan, J.C.A. Miller-Jones, W. Raja, J.R. Allison, P.F.L. Jacob, et al.. Measuring the distance to the black hole candidate X-ray binary MAXI J1348–630 using H I absorption. Monthly Notices of the Royal Astronomical Society, 2021, 501 (1), pp.L60-L64. ⟨10.1093/mnrasl/slaa195⟩. ⟨hal-03034733⟩
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