The evolution of a newborn millisecond magnetar with a propeller-recycling disk

Abstract

A rapidly rotating and highly magnetized neutron star (NS) could be formed from the explosive phenomena such as superluminous supernovae and gamma-ray bursts. This newborn NS can substantially influence the emission of these explosive transients through its spin-down. The spin-down evolution of the NS can sometimes be affected by fallback accretion, although it is usually regulated by the magnetic dipole radiation and gravitational wave radiation of the NS. Under appropriate conditions, the accreting material can be firstly ejected and subsequently recycled back, so that the accretion disk can keep in a quasi-steady state for a long time. Here we describe the interaction of the NS with such a propeller-recycling disk and their co-evolution. Our result shows that, the spin-down of the NS can be initially dominated by the propeller, which prevents the disk material from falling onto the NS until hundreds or thousands of seconds later. It is suggested that the abrupt fall of the disk material onto the NS could significantly suppress the magnetic dipole radiation and then convert the NS from a normal magnetar to a low-field magnetar. This evolution behavior of the newborn NS can help to understand the very different influence of the NS on the early GRB afterglows and the late supernova/kilonova emission.

6 pages, 2 figures, Accepted for publication in ApJ

References in corpus (11)

• Producing ultra-strong magnetic fields in neutron star mergers
• Short Duration Gamma-Ray Bursts with Extended Emission from Proto-Magnetar Spin-Down
• X-Ray Flares from Postmerger Millisecond Pulsars
• The Millisecond Magnetar Central Engine in short GRBs
• Mass Fall-back and Accretion in the Central Engine of Gamma-Ray Bursts
• Fallback accretion in the aftermath of a compact binary merger
• Properties of Gamma-Ray Burst Progenitor Stars
• Hyperaccreting Black Hole as Gamma-Ray Burst Central Engine. II. Temporal evolution of central engine parameters during Prompt and Afterglow Phases
• The role of newly born magnetars in gamma-ray burst X-ray afterglow emission: Energy injection and internal emission
• X-ray transients from the accretion-induced collapse of white dwarfs
• Discovery of 1-5 Hz flaring at high luminosity in SAX J1808.4-3658

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• Evolution of Crab Pulsar: Magnetic Inclination Angle and Spin