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Constraining the properties of dense neutron star cores: The case of the low-mass X-ray binary HETE J1900.1-2455
N. Degenaar, D. Page, J. van den Eijnden +3
Measuring the time evolution of the effective surface temperature of neutron stars can provide invaluable information on the properties of their dense cores. Here, we report on a n…
A Swift study of long-term changes in the X-ray flaring properties of Sagittarius A*
A. Andrés, J. van den Eijnden, N. Degenaar +12
The radiative counterpart of the supermassive black hole at the Galactic Centre, Sagittarius A*, displays flaring emission in the X-ray band atop a steady, quiescent level. Flares…
The evolving radio jet from the neutron star X-ray binary 4U 182030
T. D. Russell, N. Degenaar, J. van den Eijnden +6
The persistently bright ultra-compact neutron star low-mass X-ray binary 4U 182030 displays a 170 d accretion cycle, evolving between phases of high and low X-ray modes, w…
A new radio census of neutron star X-ray binaries
J. van den Eijnden, N. Degenaar, T. D. Russell +16
We report new radio observations of a sample of thirty-six neutron star (NS) X-ray binaries, more than doubling the sample in the literature observed at current-day sensitivities.…
Revisiting the archetypical wind accretor Vela X-1 in depth -- A case study of a well-known X-ray binary and the limits of our knowledge
Peter Kretschmar, Ileyk El Mellah, Silvia Martínez-Núñez +9
Context: Vela X-1 is one of the best studied X-ray binaries. Frequently though, specific values for its parameters have been used in subsequent studies without considering alternat…
Dips and eclipses in the X-ray binary Swift J1858.6-0814 observed with NICER
D. J. K. Buisson, D. Altamirano, M. Armas Padilla +24
We present the discovery of eclipses in the X-ray light curves of the X-ray binary Swift J1858.6-0814. From these, we find an orbital period of s ($\appro…