Details

Autor(en) / Beteiligte

• Zha, Shuai
• O’Connor, Evan P.
• Chu, Ming-chung
• Lin, Lap-Ming
• Couch, Sean M.

Titel

Gravitational-wave Signature of a First-order Quantum Chromodynamics Phase Transition in Core-Collapse Supernovae

Ist Teil von

• Physical review letters, 2020-07, Vol.125 (5), p.1-051102, Article 051102

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• A first-order quantum chromodynamics (QCD) phase transition (PT) may take place in the protocompact star (PCS) produced by a core-collapse supernova (CCSN). In this work, we study the consequences of such a PT in a nonrotating CCSN with axisymmetric hydrodynamic simulations. We find that the PT leads to the collapse of the PCS and results in a loud burst of gravitational waves (GWs). The amplitude of this GW burst is ∼ 30 times larger than the postbounce GW signal normally found for nonrotating CCSN. It shows a broad peak at high frequencies ( ∼ 2500 – 4000     Hz ) in the spectrum, has a duration of ≲ 5     ms , and carries ∼ 3 orders of magnitude more energy than the other episodes. Also, the peak frequency of the PCS oscillation increases dramatically after the PT-induced collapse. In addition to a second neutrino burst, the GW signal, if detected by the ground-based GW detectors, is decisive evidence of the first-order QCD PT inside CCSNe and provides key information about the structure and dynamics of the PCS.