Millisecond magnetar or accreting black hole as GRB engine? · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title
Millisecond magnetar or accreting black hole as GRB engine?
Plain
The engine could be a fast-spinning, highly magnetized neutron star or a newborn black hole swallowing a disk; each leaves different marks in the X-ray afterglow.
Precise · changed · core
Revision 1: For long and short GRBs, determine whether the engine is a millisecond proto-magnetar (rotational energy at most $\sim 2e52\ \mathrm{erg}$, X-ray plateau followed by $L\sim t^{-2}$ decay) or a hyperaccreting black hole (Blandford-Znajek power with fall-back accretion L ~ t^-5/3). Answer: per-burst engine classification with energy budget, using X-ray plateaus, extended emission and late flares.
Revision 2: For long and short GRBs, determine whether the engine is a millisecond proto-magnetar (rotational energy at most $\sim 2 \times 10^{52}\ \mathrm{erg}$, X-ray plateau followed by $L\sim t^{-2}$ decay) or a hyperaccreting black hole (Blandford-Znajek power with fall-back accretion L ~ t^-5/3). Answer: per-burst engine classification with energy budget, using X-ray plateaus, extended emission and late flares.
Settled by · changed · core
Revision 1: Beaming-corrected jet energies above $2e52\,\mathrm{erg}$ excluding magnetars for a burst subclass, and gravitational-wave detection of the post-merger remnant for short bursts.
Revision 2: Beaming-corrected jet energies above $2 \times 10^{52}\,\mathrm{erg}$ excluding magnetars for a burst subclass, and gravitational-wave detection of the post-merger remnant for short bursts.
Kind
well-posed
Answer type
identification
References
(empty)
Literature status
contested
Status note
(empty)
Posed since
(empty)

Decisions