The 2018 outburst of BHXB H1743−322 as seen with MeerKAT

D.R.A. Williams , S.E. Motta , R. Fender , J. Bright , I. Heywood , E. Tremou (1) , P. Woudt , D.A.H. Buckley , S. Corbel (1, 2) , M. Coriat (3) , T. Joseph , L. Rhodes , G.R. Sivakoff , A.J. van Der Horst

1 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
2 USN - Unité Scientifique de la Station de Nançay
3 IRAP - Institut de recherche en astrophysique et planétologie

In recent years, the black hole candidate X-ray binary system H1743−322 has undergone outbursts and it has been observed with X-ray and radio telescopes. We present 1.3 GHz MeerKAT radio data from the ThunderKAT Large Survey Project on radio transients for the 2018 outburst of H1743−322. We obtain seven detections from a weekly monitoring programme and use publicly available Swift X-ray Telescope and Monitor of All-sky X-ray Image data to investigate the radio/X-ray correlation of H1743−322 for this outburst. We compare the 2018 outburst with those reported in the literature for this system and find that the X-ray outburst reported is similar to previously reported ‘hard-only’ outbursts. As in previous outbursts, H1743−322 follows the ‘radio-quiet’ correlation in the radio/X-ray plane for black hole X-ray binaries, and the radio spectral index throughout the outburst is consistent with the ‘radio-quiet’ population.

Mots clés: X-rays: binaries; radio continuum: transients

Domaines: Astrophysique [astro-ph]

D.R.A. Williams, S.E. Motta, R. Fender, J. Bright, I. Heywood, et al.. The 2018 outburst of BHXB H1743−322 as seen with MeerKAT. Monthly Notices of the Royal Astronomical Society, 2020, 491 (1), pp.L29-L33. ⟨10.1093/mnrasl/slz152⟩. ⟨hal-02410939⟩