A soft-spectrum PULX candidate is reported in Cen A but XMM-SAS randomisation during data reduction renders the marginal 1.27 Hz pulsation detection unreliable across repeated reductions.
Propeller effect in action in the ultraluminous accreting magnetar M82 X-2
2 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We present here the first convincing observational manifestation of a magnetar-like magnetic field in an accreting neutron star in binary system - the first pulsating ultra-luminous X-ray source X-2 in the galaxy M82. Using the Chandra X-ray observatory data we show that the source exhibit the bimodal distribution of the luminosity with two well-defined peaks separated by a factor of 40. This behaviour can be interpreted as the action of the "propeller regime" of accretion. The onset of the propeller in a 1.37 s pulsar at luminosity of ~$10^{40}$ erg/s implies the dipole component of the neutron star magnetic field of ~$10^{14}$ G.
fields
astro-ph.HE 2years
2026 2representative citing papers
Gemini spectroscopy suggests an A-type supergiant donor in NGC 1313 X-2 and provides updated constraints on orbital parameters, disk size, and gas bubble expansion.
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Significant or Not? The Impact of Randomisation During Data Reduction on Confirming a New Pulsating Ultraluminous X-ray Source Candidate in Centaurus A
A soft-spectrum PULX candidate is reported in Cen A but XMM-SAS randomisation during data reduction renders the marginal 1.27 Hz pulsation detection unreliable across repeated reductions.
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Deep optical spectroscopic monitoring of the pulsating ULX NGC 1313 X-2 with longslit Gemini observations
Gemini spectroscopy suggests an A-type supergiant donor in NGC 1313 X-2 and provides updated constraints on orbital parameters, disk size, and gas bubble expansion.