1305.5543 (Enrique Moreno Méndez)

From Gamma-Ray Bursts/Hypernovae To Black-Hole Binaries    [PDF]

Enrique Moreno Méndez

In this work I summarize a model of binary stellar evolution involving Case C mass transfer followed by a common envelope that strips away the hydrogen from the core of the primary star at the cost of shrinking the orbital separation and then, through tidal interaction, spins it up. This model is then used to produce the possible progenitors of long gamma-ray burst / hypernova (GRB/HN) explosions. As the core collapses with the newly supplied angular momentum it produces a Kerr black hole surrounded by an accretion disk. Energy is extracted from the rotation of the black hole (BH) through the Blandford-Znajek (BZ) mechanism to power both, the long gamma-ray burst and the accompanying hypernova (supernova type Ic broad line). If the binary survives the asymmetric mass loss its remnant is a black-hole binary that may eventually be observed as a soft X-ray transient (SXT) when the companion evolves and starts to transfer mass back to the black hole. A comparison with a sample of black-hole binaries where the masses and orbital periods are well constrained is performed.

View original: http://arxiv.org/abs/1305.5543