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

Soft Gamma Repeaters and the Anomalous X-ray Pulsars are believed to containslowly spinning "magnetars". The enormous energy liberated in the 2004 Dece 27giant flare from SGR 1806-20, together with the likely recurrence time of suchevents, points to an internal magnetic field strength ~ 10^{16} G. Such strongfields are expected to be generated by a coherent alpha-Omega dynamo in theearly seconds after the Neutron Star formation, if its spin period is of a fewmilliseconds at most. A substantial deformation of the NS is caused by suchfields and a newborn millisecond-spinning magnetar would thus radiate for a fewdays a strong gravitational wave signal. Such a signal may be detected withAdvanced LIGO-class detectors up to the distance of the Virgo cluster, where ~1 magnetar per year are expected to form. Recent X-ray observations reveal thatSNRs around magnetar candidates do not show evidence for a larger energycontent than standard SNRs (Vink & Kuiper 2006). This is at variance with whatwould be expected if the spin energy of the young, millisecond NS were radiatedaway as electromagnetic radiation andd/or relativistic particle winds and,thus, transferred quickly to the expanding gas shell. We show here that theserecent findings can be reconciled with the idea of magnetars being formed withfast spins, if most of their initial spin energy is radiated thorugh GWs. Inparticular, we find that this occurs for essentially the same parameter rangethat would make such objects detectable by Advanced LIGO-class detectors up tothe Virgo Cluster.Comment: Proceedings of the Conference "Isolated Neutron stars: from the  interior to the surface", Eds. D. Page, R. Turolla, S. Zan

Newborn magnetars as sources of gravitational radiation: constraints from high energy observations of magnetar candidates