Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes
Abstract
We compute the mass, radius and tidal deformability of stars containing phase transitions from hadronic to quark phase(s). These quantities are computed for three types of hadronic envelopes: purely nuclear, hyperonic, and Δ-resonance--hyperon admixed matter. We consider either a single first-order phase transition to a quark phase with a maximally stiff equation of state (EOS) or two sequential first-order phase transitions mimicking a transition from hadronic to a quark matter phase followed by a second phase transition to another quark phase. We explore the parameter space which produces low-mass twin and triplet configurations where equal-mass stars have substantially different radii and tidal deformabilities. We demonstrate that while for purely hadronic stiff EOS the obtained maximum mass is inconsistent with the upper limit on this quantity placed by GW170817, the inclusion of the hyperonic and Δ-resonance degrees of freedom, as well as the deconfinement phase transition at sufficiently low density, produces a configuration of stars consistent with this limit. The obtained hybrid star configurations are in the mass range relevant for the interpretation of the GW170817 event. We compare our results for the tidal deformability with the limits inferred from GW170817 showing that the onset of non-nucleonic phases, such as Δ-resonance--hyperonmore »
- Authors:
-
- Goethe Univ., Frankfurt (Germany)
- Univ. of Wroclaw (Poland)
- Washington Univ., St. Louis, MO (United States)
- Publication Date:
- Research Org.:
- Washington Univ., St. Louis, MO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1606368
- Alternate Identifier(s):
- OSTI ID: 1605625
- Grant/Contract Number:
- FG02-05ER41375
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 6; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Li, Jia Jie, Sedrakian, Armen, and Alford, Mark. Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.101.063022.
Li, Jia Jie, Sedrakian, Armen, & Alford, Mark. Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes. United States. https://doi.org/10.1103/PhysRevD.101.063022
Li, Jia Jie, Sedrakian, Armen, and Alford, Mark. Fri .
"Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes". United States. https://doi.org/10.1103/PhysRevD.101.063022. https://www.osti.gov/servlets/purl/1606368.
@article{osti_1606368,
title = {Relativistic hybrid stars with sequential first-order phase transitions and heavy-baryon envelopes},
author = {Li, Jia Jie and Sedrakian, Armen and Alford, Mark},
abstractNote = {We compute the mass, radius and tidal deformability of stars containing phase transitions from hadronic to quark phase(s). These quantities are computed for three types of hadronic envelopes: purely nuclear, hyperonic, and Δ-resonance--hyperon admixed matter. We consider either a single first-order phase transition to a quark phase with a maximally stiff equation of state (EOS) or two sequential first-order phase transitions mimicking a transition from hadronic to a quark matter phase followed by a second phase transition to another quark phase. We explore the parameter space which produces low-mass twin and triplet configurations where equal-mass stars have substantially different radii and tidal deformabilities. We demonstrate that while for purely hadronic stiff EOS the obtained maximum mass is inconsistent with the upper limit on this quantity placed by GW170817, the inclusion of the hyperonic and Δ-resonance degrees of freedom, as well as the deconfinement phase transition at sufficiently low density, produces a configuration of stars consistent with this limit. The obtained hybrid star configurations are in the mass range relevant for the interpretation of the GW170817 event. We compare our results for the tidal deformability with the limits inferred from GW170817 showing that the onset of non-nucleonic phases, such as Δ-resonance--hyperon admixed phase and/or the quark phase(s), are favored by this data if the nuclear EOS is stiff. Also, we show that low-mass twins and especially triplets proliferate the number of combinations of possible types of stars that can undergo a merger event, the maximal number being six in the case of triplets. The prospects for uncovering the first-order phase transition(s) to and in quark matter via measurements of tidal deformabilities in merger events are discussed.},
doi = {10.1103/PhysRevD.101.063022},
journal = {Physical Review D},
number = 6,
volume = 101,
place = {United States},
year = {Fri Mar 20 00:00:00 EDT 2020},
month = {Fri Mar 20 00:00:00 EDT 2020}
}
Web of Science
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