Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Nuclear Astrophysics IV

HK 49.5: Vortrag

Mittwoch, 13. März 2024, 18:45–19:00, HBR 14: HS 4

Decoding the HESS J1731-347 compact object‘s equation of state — •Ishfaq Ahmad Rather¹, Grigoris Panotopoulos², and Ilidio Lopes³ — ¹Institute of Theoretical Physics, Goethe University, Frankfurt am main — ²Departamento de Ciencias Fisicas, Universidad de la Frontera, Casilla 54-D, 4811186 Temuco, Chile — ³CENTRA, Instituto Superior Tecnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal

The recently announced measurement of HESS J1731-347 with M = 0.77_−0.17^+0.20 M_⊙ and R = 10.4_−0.78^+0.86 km challenges our understanding of the EoS at densities (1-2) times the nuclear saturation density [1]. This estimate of maximum mass, 0.77 M_⊙, is intriguing, given the previous analysis revealed that the minimum possible mass of a neutron star is 1.17M*. The HESS J1731-347 measurement is also interesting as the first simultaneous measurement of the mass, radius, and surface temperature of a compact star and opens the possibility to study its thermal evolution. We examine the nature of HESS J1731-347 as a strange star and study the radial properties at its maximum mass [2]. We also explore the possibility of HESS J1731-347 CCO to be a Dark Matter admixed Strange star.

References:

1) V. Doroshenko, V. Suleimanov, G. Pühlhofer, A. Santangelo, Nat. Astron. 6(12), 1444-1451 (2022)

2) I. A. Rather, G. Panotopoulos, I. Lopes, EPJ C, 83:1065 (2023)

Keywords: Strange Stars; Dark matter; Equation of State; HESS J1731-347; Radial oscillations