New aspects of the QCD phase transition in proto-neutron stars and core-collapse supernovae

Hempel, Matthias and Heinimann, Oliver and Yudin, Andrey and Iosilevskiy, Igor and Liebendörfer, Matthias and Thielemann, Friedrich-Karl. (2017) New aspects of the QCD phase transition in proto-neutron stars and core-collapse supernovae. In: Journal of Physics Conference Series, 861.

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The QCD phase transition from hadronic to deconfined quark matter is found to be a so-called "entropic" phase transition, characterized, e.g., by a negative slope of the phase transition line in the pressure-temperature phase diagram. In a first part of the present proceedings it is discussed that entropic phase transitions lead to unusual thermal properties of the equation of state (EoS). For example one finds a loss of pressure (a "softening") of the proto-neutron star EoS with increasing entropy. This can lead to a novel, hot third family of compact stars, which exists only in the early proto-neutron star phase. Such a hot third family can trigger explosions of core-collapse supernovae. However, so far this special explosion mechanism was found to be working only for EoSs which are not compatible with the 2 M⊙ constraint for the neutron star maximum mass. In a second part of the proceeding it is discussed which quark matter parameters could be favorable for this explosion mechanism, and have sufficiently high maximum masses at the same time.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Astrophysik (Liebendörfer)
05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Hempel, Matthias
Item Type:Conference or Workshop Item, refereed
Conference or workshop item Subtype:Conference Paper
Publisher:IOP Publishing
Note:Publication type according to Uni Basel Research Database: Conference paper
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Last Modified:24 Jan 2018 11:35
Deposited On:28 Dec 2017 07:30

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