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

We report on our monitoring of the strong-field magnetar-like pulsar PSRJ1846-0258 with the Neutron Star Interior Composition Explorer (NICER) and thetiming and spectral evolution during its outburst in August 2020.Phase-coherent timing solutions were maintained from March 2017 throughNovember 2021, including a coherent solution throughout the outburst. Wedetected a large spin-up glitch of magnitude \Delta\nu/\nu = 3 X 10^{-6} at thestart of the outburst and observed an increase in pulsed flux that reached afactor of more than 10 times the quiescent level, a behavior similar to that ofthe 2006 outburst. Our monitoring observations in June and July 2020 indicatethat the flux was rising prior to the SWIFT announcement of the outburst onAugust 1, 2020. We also observed several sharp rises in the pulsed fluxfollowing the outburst and the flux reached quiescent level by November 2020.The pulse profile was observed to change shape during the outburst, returningto the pre-outburst shape by 2021. Spectral analysis of the pulsed emission ofNICER data shows that the flux increases result entirely from a new black bodycomponent that gradually fades away while the power-law remains nearly constantat its quiescent level throughout the outburst. Joint spectral analysis ofNICER and simultaneous NuSTAR data confirms this picture. We discuss theinterpretation of the magnetar-like outburst and origin of the transientthermal component in the context of both a pulsar-like and a magnetar-likemodel.

A NICER View on the 2020 Magnetar-Like Outburst of PSR J1846-0258