Gießen 2024 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Nuclear Astrophysics II
HK 31.1: Gruppenbericht
Dienstag, 12. März 2024, 17:30–18:00, HBR 19: C 103
Quark-hadron phase transition in neutron star cooling — •Melissa Mendes1,2, Jan-Erik Christian3, Farrukh Fattoyev4, Andrew Cumming5, Jürgen Schaffner-Bielich6, and Charles Gale5 — 1Technische Universität Darmstadt, Germany — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum fu*r Schwerionenforschung GmbH, Germany — 3Universität Hamburg, Germany — 4Manhattan College, United States — 5McGill University, Canada — 6Goethe-Universität, Frankfurt, Germany
The study of neutron stars has proved complex, both from a theoretical point of view as well as from an observational one. Nonetheless, major advances have been achieved lately with research initiatives, such as NICER and LIGO, which provided relevant constraints to the nuclear equation of state (EOS) with astronomical observations. We give a brief overview of the state-of-the-art data constraints to the neutron star EOS and introduce the possibility of constraining these EOS even further with neutron star temperature measurements. We claim that investigating the cooling of already cold neutron stars is crucial for a better understanding of the nuclear EOS, in particular regarding the existence of a possible quark-hadron phase transition. In this talk, we describe the cooling signature of a quark phase in neutron star temperature evolution considering quark-hadron hybrid equations of state with a first-order phase transition. We compare our calculations with current neutron star luminosity data and obtain estimates for phase transition density. MM funded by the ERC Grant Agreement No. 101020842.
Keywords: neutron star; equation of state; phase transition; cooling