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We show that a Quark-Nova (QN; the explosive transition of a neutron star toa quark star) occurring a few days following the supernova explosion of anOxygen-type Wolf-Rayet (WO) star can account for the intriguing features ofASASSN-15lh, including its extreme energetics, its double-peaked light-curveand the evolution of its photospheric radius and temperature. A two-componentconfiguration of the homologously expanding WO remnant (an extended envelopeand a compact core) is used to harness the kinetic energy (>10^52 ergs) of theQN ejecta. The delay between the WO SN and the QN yields a large (~ 10^4 Rsun)envelope which when energized by the QN ejecta/shock gives the first peak inour model. As the envelope's photosphere recedes into the slowly expanding, hotand insulated, denser core (initially heated by the QN shock) a second humpemerges. The spectrum in our model should reflect the composition of an WO SNremnant re-heated by a QN going off in its wake.

The Superluminous (Type I) Supernova ASASSN-15lh : A case for a Quark-Nova inside an Oxygen-type Wolf-Rayet supernova remnant