English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A population of obscured supergiant High Mass X-ray Binaries (sgHMXBs) hasbeen discovered by INTEGRAL. X-ray wind tomography of IGR J17252-3616 inferreda slow wind velocity to account for the enhanced obscuration. The main goal ofthis study is to understand under which conditions high obscuration couldoccur. We have used an hydrodynamical code to simulate the flow of the stellarwind around the neutron star. A grid of simulations was used to study thedependency of the absorbing column density and of the X-ray light-curves on themodel parameters. A comparison between the simulation results and theobservations of IGR J17252-3616 provides an estimate on these parameters. Wehave constrained the wind terminal velocity to 500-600 km/s and the neutronstar mass to 1.75-2.15 solar masses. We have confirmed that the initialhypothesis of a slow wind velocity with a moderate mass loss rate is valid. Themass of the neutron star can be constrained by studying its impact on theaccretion flow.

Neutron star masses from hydrodynamical effects in obscured sgHMXBs