2022
DOI: 10.48550/arxiv.2201.07252
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Quasi periodic whispers from a transient ULX in M\,101: signatures of a fast-spinning neutron star?

Ryan T. Urquhart,
Roberto Soria,
Rosanne Di Stefano
et al.

Abstract: We have studied the unusual time variability of an ultraluminous X-ray source in M 101, 4XMM J140314.2+541806 (henceforth, J1403), using Chandra and XMM-Newton data. Over the last two decades, J1403 has shown short-duration outbursts with an X-ray luminosity ∼1-3 ×10 39 erg s −1 , and longer intervals at luminosities ∼0.5-1 ×10 38 erg s −1 . The bimodal behaviour and fast outburst evolution (sometimes only a few days) are more consistent with an accretor/propeller scenario for a neutron star than with the cano… Show more

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