A light strange star in the remnant HESS J1731-347: minimal consistency checks

Abstract

Context: Recently, Doroshenko and collaborators reported a very low-mass compact star, a Central Compact Object named XMMU J173203.3-344518 inside the supernova remnant HESS J1731-347. Its tiny mass is at odds with all calculations of minimum masses of neutron stars generated by iron cores, therefore (and even if not compellingly) it has been suggested to be a {\it strange star}. Besides the mass, a radius and surface temperature have been extracted from data, and the whole body of information should ultimately reveal if this object is truly consistent with an exotic composition. Aims: To understand the status of the compact object XMMU J173203.3-344518 in HESS J1731-347 within the existing models of strange stars, including its prompt formation. Methods: The information obtained on the mass, radius and surface temperature are compared to theoretical calculations performed within usual theoretical models using General Relativity as the assumed theory of gravitation and a handful of cooling scenarios. A qualitative discussion showing the consistency of the strange-matter driven supernova scenario with a low-mass compact star is provided. Results: We found that the object HESS J1731-347 fits within the same quark star models recently employed to explain the masses and radii of the NICER objects PSR J040+6620 and PSR J0030+0451, in which both quantities were simultaneously determined. It is also remarkable to find that a simple cooling scenario devised $30\text{ yr}$ ago with superconducting quarks provides an overall good explanation of the surface temperature. Conclusions: We conclude that XMMU J173203.3-344518 in the remnant HESS J1731-347 fits into a ``strange star'' scenario that is also consistent with heavier compact stars, which can also belong to the same class and constitute an homogeneous type of self-bound objects produced in Nature.

Accepted by A&A Letters, in the press

References in corpus (11)

• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
• Was GW190814 a black hole -- strange quark star system?
• Numerical Simulation of the Hydrodynamical Combustion to Strange Quark Matter
• Inferring the neutron star maximum mass and lower mass gap in neutron star-black hole systems with spin
• Probing The Local Environment of the Supernova Remnant HESS J1731-347 with CO and CS Observations
• Modelling a $2.5M_{\odot }$ Compact Star with Quark Matter
• An X-Ray-dim "Isolated'' Neutron Star in a Binary?
• Neutrino emissivities and bulk viscosity in neutral two-flavor quark matter

Cited by in corpus (30)

• What is the nature of the HESS J1731-347 compact object?
• Colour-Flavour Locked Quark Stars in Light of the Compact Object in HESS J1731-347 and the GW190814 Event
• Nuclear and Hybrid Equations of State in Light of the Low-Mass Compact Star in HESS J1731-347
• Hybrid stars in light of the HESS J1731-347 remnant and the PREX-II experiment
• Quark stars with a unified interacting equation of state in regularized 4D Einstein-Gauss-Bonnet gravity
• Baryonic models of ultra-low-mass compact stars for the central compact object in HESS J1731-347
• Could a slow stable hybrid star explain the central compact object in HESS~J1731-347?
• Probing the Impact of WIMP Dark Matter on Universal Relations, GW170817 Posterior and Radial Oscillations
• Neutron stars in 4D Einstein-Gauss-Bonnet gravity
• A Bayesian study of quark models in view of recent astrophysical constraints
• Quadratic Rastall Gravity: from low-mass HESS J1731-347 to high-mass PSR J0952-0607 pulsars
• Speed of sound bounds and first-order phase transitions in compact stars
• Two-flavor color superconducting quark stars may not exist
• Fully general relativistic simulations of rapidly rotating quark stars: Oscillation modes and universal relations
• Is the central compact object in HESS J1731-347 a hybrid star with a quark core? An analysis with the constant speed of sound parametrization
• Analyzing the dense matter equation of states in the light of the compact object HESS J1731-347
• Strange stars admixed with dark matter: equiparticle model in a two fluid approach
• Exploring $\Delta$-resonance in neutron stars: implications from astrophysical and nuclear observations
• Observational Probes of the Neutron Star Equation of State with Hyperons, Bosonic Dark Matter, and Quark Matter
• Quasi-normal f-modes of anisotropic quark stars in full general relativity
• Strange quark stars: the role of excluded volume effects
• Confronting recent light compact star observations with color-flavor locked quark matter
• Properties of the Object HESS J1731-347 as a Twin Compact Star
• Constraints on color-flavor locked quark matter in view of the HESS J1731-347 measurement
• Buchdahl limit of compact stars in presence of Weyl anomaly
• On the Cooling of Compact Stars in Light of the HESS J1731-347 Remnant
• General relativistic hydrodynamic simulations of binary strange star mergers
• Constraints on Bose-Einstein condensate stars as neutron stars models from new observational data
• Finding strangelets in cosmic rays from HESS J1731-347, a possible strange quark star using the Cherenkov Telescope Array Observatory
• The mass of the neutron star in 4U 1820-30 revisited