activity
20062026
most citedDiscovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13

330 citations · 4.9k across the 99 of their papers we have counts for

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Showing 2021Show all

12 papers · 1 filter

astro-ph.HE2021★ 32 cited

Orbital decay in M82 X-2

Matteo Bachetti, Marianne Heida, Thomas Maccarone +21

M82 X-2 is the first pulsating ultraluminous X-ray source (PULX) discovered. The luminosity of these extreme pulsars, if isotropic, implies an extreme mass transfer rate. An altern…

astro-ph.HE2021★ 15 cited

Detection of periodic signals in AGN red noise light curves: empirical tests on the Auto-Correlation Function and Phase Dispersion Minimization

S. Krishnan, A. G. Markowitz, A. Schwarzenberg-Czerny +1

Active galactic nucleus (AGN) emission is dominated by stochastic, aperiodic variability which overwhelms any periodic/quasi-periodic signal (QPO) if one is present. The Auto Corre…

astro-ph.HE2021★ 8 cited

The impact of precession on the observed population of ULXs

Norman Khan, Matthew. J. Middleton, Grzegorz Wiktorowicz +3

The discovery of neutron stars powering several ultraluminous X-ray sources (ULXs) raises important questions about the nature of the underlying population. In this paper we build…

astro-ph.HE2021★ 19 cited

Thermally driven winds in ULXs

Matthew Middleton, Nick Higginbottom, Christian Knigge +2

The presence of radiatively driven outflows is well established in ultraluminous X-ray sources (ULXs). These outflows are optically thick and can reprocess a significant fraction o…

astro-ph.HE2021★ 17 cited

The chameleon on the branches: spectral state transition and dips in NGC 247 ULX-1

A. D'Aì, C. Pinto, M. Del Santo +14

Soft Ultra-Luminous X-ray (ULXs) sources are a subclass of the ULXs that can switch from a supersoft spectral state, where most of the luminosity is emitted below 1 keV, to a soft…

astro-ph.HE2021★ 18 cited

Broadband X-ray spectral variability of the pulsing ULX NGC 1313 X-2

A. Robba, C. Pinto, D. J. Walton +12

It is thought that ultraluminous X-ray sources (ULXs) are mainly powered by super-Eddington accreting neutron stars or black holes as shown by recent discovery of X-ray pulsations…