2024ApJ...973L..50E

Query : 2024ApJ...973L..50E

2024ApJ...973L..50E - Astrophys. J., 973, L50 (2024/October-1)

Exotic Stable Branches with Efficient TOV Sequences.

ESSICK R.

Abstract (from CDS):

Modern inference schemes for the neutron star (NS) equation of state (EoS) require large numbers of stellar models constructed with different EoS, and these stellar models must capture all the behavior of stable stars. I introduce termination conditions for sequences of stellar models for cold nonrotating NSs that can identify all stable stellar configurations up to arbitrarily large central pressures along with an efficient algorithm to build accurate interpolators for macroscopic properties. I explore the behavior of stars with both high- and low-central pressures. Interestingly, I find that EoSs with monotonically increasing sound-speed can produce multiple stable branches (twin stars) and that large phase transitions at high densities can produce stable branches at nearly any mass scale, including sub-solar masses while still supporting stars with M > 2 M⊙. I conclude with some speculation about the astrophysical implications of this behavior.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Neutron stars - Compact objects - Degenerate matter - Ejecta - General relativity - Relativity - Gravitation

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PSR J0740+6620 Psr 07 40 45.799 +66 20 33.60           ~ 395 0

Query : 2024ApJ...973L..50E

Basic data :
PSR J0740+6620 -- Pulsar
Other object types: otypes_help 		gam (3FGL,4FGL,...), Psr (2022ApJS,PSR), BL? (2021MNRAS)
ICRS coord. (ep=J2000) : 		07 40 45.799 +66 20 33.60 (Radio) [ ] C 2018ApJ...859...93L
FK4 coord. (ep=B1950 eq=1950) : 		07 35 53.012 +66 27 30.42 [ ]
Gal coord. (ep=J2000) : 		149.729709 +29.599376 [ ]
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Identifiers (5) :
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PSR J0742+6620 4FGL J0741.0+6618 PSR J0740+6620
3FGL J0740.8+6621 FL8Y J0741.0+6618

References (395 between 1850 and 2026) (Total 395)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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