SIMBAD references

2011ApJ...734L..33S - Astrophys. J., 734, L33 (2011/June-3)

Sw 1644+57/GRB 110328A: the physical origin and the composition of the relativistic outflow.

SHAO L., ZHANG F.-W., FAN Y.-Z. and WEI D.-M.

Abstract (from CDS):

Sw 1644+57/GRB 110328A is a remarkable cosmological X-ray outburst detected by the Swift satellite. Its early-time (t ≲ 0.1 days since the trigger) X-ray emission resembles some gamma-ray bursts (GRBs), e.g., GRB 090417B. But the late-time flaring X-ray plateau lasting >40 days renders it unique. We examine the possibilities that the outburst is a super-long GRB powered either by the fallback accretion onto a nascent black hole or by a millisecond pulsar, and find out that these two scenarios can address some but not all of the main observational features. We then focus on the model of tidal disruption of a (giant) star by a massive black hole. The mass of the tidal-disrupted star is estimated to be ≲ a few solar masses. A simple/straightforward argument for a magnetic origin of the relativistic outflow is presented.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: general - radiation mechanisms: non-thermal - X-rays: general

Simbad objects: 5

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