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Part 1: Document Description
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Citation |
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Title: |
What neutron stars tell about the hadron-quark phase transition: A Bayesian study |
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Identification Number: |
hdl:21.15109/CONCORDA/O5XS5A |
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Distributor: |
ARP |
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Date of Distribution: |
2023-11-06 |
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Version: |
1 |
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Bibliographic Citation: |
Takátsy, János; Kovács, Péter; Wolf, György; Schaffner-Bielich, Juergen, 2023, "What neutron stars tell about the hadron-quark phase transition: A Bayesian study", https://hdl.handle.net/21.15109/CONCORDA/O5XS5A, ARP, V1 |
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Citation |
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Title: |
What neutron stars tell about the hadron-quark phase transition: A Bayesian study |
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Identification Number: |
hdl:21.15109/CONCORDA/O5XS5A |
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Authoring Entity: |
Takátsy, János (Wigner Research Centre for Physics) |
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Kovács, Péter (Wigner Research Centre for Physics) |
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Wolf, György (Wigner Research Centre for Physics) |
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Schaffner-Bielich, Juergen (Institut für Theoretische Physik, Goethe Universität Frankfurt) |
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Grant Number: |
FK 131982 |
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Grant Number: |
K 138277 |
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Grant Number: |
ÚNKP-22-3 |
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Grant Number: |
315477589-TRR 211 |
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Grant Number: |
315477589-TRR 211 |
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Distributor: |
ARP |
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Access Authority: |
Kovács, Péter |
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Depositor: |
Kovács, Péter |
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Date of Deposit: |
2023-10-18 |
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Holdings Information: |
https://hdl.handle.net/21.15109/CONCORDA/O5XS5A |
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Study Scope |
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Keywords: |
Physics, Astronomy and Astrophysics, Effective Field Theory, Neutron stars & pulsars, Statistical methods |
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Abstract: |
The existence of quark matter inside the heaviest neutron stars has been the topic of numerous recent studies, many of them suggesting that a phase transition to strongly interacting conformal matter inside neutron stars is feasible. Here we examine this hybrid star scenario using a soft and a stiff hadronic model, a constituent quark model with three quark flavors, and applying a smooth crossover transition between the two. Within a Bayesian framework, we study the effect of up-to-date constraints from neutron star observations on the equation-of-state (EOS) parameters and various neutron star observables. Our results show that a pure quark core is only possible if the maximum mass of neutron stars is below ~2.35 <i>M</i><sub>⊙</sub>. However, we also find, consistent with other studies, that a peak in the speed of sound, exceeding 1/3, is highly favored by astrophysical measurements, which might indicate the percolation of hadrons at ~3-4 <i>n</i><sub>0</sub>. Even though our prediction for the phase transition parameters varies depending on the specific astrophysical constraints utilized, the position of the speed of sound peak only changes slightly, while the existence of pure quark matter below ~4 <i>n</i><sub>0</sub>, using our parametrization, is disfavored. On the other hand, the preferred range for the EOS shows signs of conformality above ~4 <i>n</i><sub>0</sub>. Additionally, we present the difference in the upper bounds of radius estimates using the full probability density data and sharp cutoffs and stress the necessity of using the former. |
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Other Study Description Materials |
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Related Publications |
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Citation |
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Title: |
János Takátsy, Péter Kovács, György Wolf, and Jürgen Schaffner-Bielich Phys. Rev. D 108, 043002 |
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Identification Number: |
10.1103/PhysRevD.108.043002 |
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Bibliographic Citation: |
János Takátsy, Péter Kovács, György Wolf, and Jürgen Schaffner-Bielich Phys. Rev. D 108, 043002 |
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