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Lorentz Factors of compact jets in Black hole X-ray binaries
Payaswini Saikia, David M. Russell, D. M. Bramich +3
Compact, continuously launched jets in black hole X-ray binaries (BHXBs) produce radio to optical-infrared synchrotron emission. In most BHXBs, an infrared (IR) excess (above the d…
Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst
N. V. Gusinskaia, T. D. Russell, J. W. T. Hessels +7
IGR J175912342 is a new accreting millisecond X-ray pulsar (AMXP) that was recently discovered in outburst in 2018. Early observations revealed that the source's radio emission…
Quasi-simultaneous radio and X-ray observations of Aql X-1: probing low luminosities
N. V. Gusinskaia, J. W. T. Hessels, N. Degenaar +8
Aql X-1 is one of the best-studied neutron star low-mass X-ray binaries. It was previously targeted using quasi-simultaneous radio and X-ray observations during at least 7 differen…
Chandra Spectral and Timing Analysis of Sgr A*'s Brightest X-ray Flares
Daryl Haggard, Melania Nynka, Brayden Mon +17
We analyze the two brightest Chandra X-ray flares detected from Sagittarius A*, with peak luminosities more than 600 x and 245 x greater than the quiescent X-ray emission. The brig…
Crust cooling of the neutron star in Aql X-1: Different depth and magnitude of shallow heating during similar accretion outbursts
N. Degenaar, L. S. Ootes, D. Page +7
The structure and composition of the crust of neutron stars plays an important role in their thermal and magnetic evolution, hence in setting their observational properties. One wa…
Recurrent low-level luminosity behaviour after a giant outburst in the Be/X-ray transient 4U 0115+63
A. Rouco Escorial, R. Wijnands, J. van den Eijnden +4
In 2017, the Be/X-ray transient 4U 0115+63 exhibited a new type-II outburst that was two times fainter than its 2015 giant outburst (in the Swift/BAT count rates). Despite this dif…