Dynamical and thermal evolution of the quark-nova ejecta

Details Dynamical and thermal evolution of the quark-nova ejecta Dynamical and thermal evolution of the quark-nova ejecta

2008-12-23

arxiv.org/abs/0812.4441v1

Astrophys.J.696:562-566,2009

Astronomy and Astrophysics

Astrophysics

5 journal pages

Scientific paper

10.1088/0004-637X/696/1/562

We explore the dynamical and thermal evolution of the ejected neutron star crust in a Quark-Nova explosion. Typical explosion energies and ejected crust masses result in relativistic ejection with Lorentz factors of a few to a few hundred. The ejecta undergoes a rapid cooling and stretching resulting in break up into many small pieces (clumps) when the ejecta is only ~ 100 km from the explosion site. The number and size of the clumps depends on whether the breakup occurs in the liquid or solid phase. For these two cases, the clump number is ~ 10^3 (liquid phase) or ~ 10^7 (solid phase) and, at break up, are spherical (size ~ 10^4 cm; liquid phase) or needle shaped (~ 10^4x10^2 cm; solid phase).

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