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On the nature of Supergiant Fast X-ray Transients

Published online by Cambridge University Press:  30 December 2019

Ignacio Negueruela
Ignacio Negueruela*
Affiliation:
Departamento de Fsica Aplicada, Facultad de Ciencias, Universidad de Alicante Carretera de San Vicente del Raspeigs/n, E03690, San Vicente del Raspeig, Alicante, Spain email: ignacio.negueruela@ua.es
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Abstract

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More than a decade after fast x-ray transients with an OB supergiant counterpart were identified as a distinct class of wind-accreting sources, we still have not reached a consensus on the physical origin of their similarities and differences with persistent sources. Both kinds seem to extend over the same range of every relevant parameter. Here I argue that, despite this overall overlap, persistent sources have – on average – later-type, more evolved counterparts, and discuss the hypothesis that SFXTs are – on average – a younger population, as well as some of its possible implications.

Keywords

accretionstars: atmospheresstars: early-typestars: mass lossstars: neutronstars: windsoutflowsX-rays: binaries
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S346: High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects , August 2018 , pp. 170 - 177
Copyright
© International Astronomical Union 2019 

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