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Gravitational instability of exotic compact objects [PDF]
European Physical Journal C: Particles and Fields, 2020 Exotic compact objects with physical surfaces a Planckian distance away from where the horizon would have been are inspired by quantum gravity. Most of these objects are defined by a classical spacetime metric, such as boson stars, gravastars and ...
Andrea Addazi +2 more
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Astroparticle Physics with Compact Objects [PDF]
Universe, 2021 Probing the existence of hypothetical particles beyond the Standard model often deals with extreme parameters: large energies, tiny cross-sections, large time scales, etc.
Peter Tinyakov +2 more
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A nearby long gamma-ray burst from a merger of compact objects [PDF]
Nature, 2022 Geoffrey Ryan +2 more
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Analysis of class I complexity induced spherical polytropic models for compact objects
Frontiers in Astronomy and Space Sciences, 2023 In this research, we present a comprehensive framework that uses a complexity factor to analyze class I generalized relativistic polytropes. We establish class I generalized Lane–Emden equations using the Karmarkar condition under both isothermal and non-
Adnan Malik +3 more
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Nonsingular, Lump-like, Scalar Compact Objects in (2 + 1)-Dimensional Einstein Gravity
UniverseWe study the space-time geometry generated by coupling a free scalar field with a noncanonical kinetic term to general relativity in (2+1) dimensions. After identifying a family of scalar Lagrangians that yield exact analytical solutions in static and ...
Roberto V. Maluf +3 more
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On the Maximum Energy Release from Formation of Static Compact Objects
Galaxies, 2023 Type II Supernova 1987A (SN 1987A), observed in 1987, released an energy of Q≈3×1053 erg. This huge energy is essentially the magnitude of gravitational potential or self-gravitational energy (PE) of a new born cold neutron star having a gravitational ...
Abhas Mitra, Krishna Kumar Singh
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Exotic Compact Objects with Two Dark Matter Fluids
The Astrophysical Journal, 2023 The generic properties of compact objects made of two different fluids of dark matter are studied in a scale-invariant approach. We investigate compact objects with a core–shell structure, where the two fluids are separated, and with mixed dark matter ...
Marie Cassing +3 more
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Compact Objects in Alternative Gravities
Universe, 2022 We address neutron stars and black holes in alternative gravities, after recalling their basic properties in General Relativity. Among the plethora of interesting alternative gravities we here focus on an interesting set of scalar-tensor theories.
Jose Luis Blázquez-Salcedo +2 more
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The Astrophysical Journal, 2023 Recent simulations find that hot gas accretion onto compact accretors is often highly turbulent and diskless, and shows a power-law density profile with slope α _ρ ≈ −1.
Wenrui Xu
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Measuring Mass and Radius of the Maximum-mass Nonrotating Neutron Star
The Astrophysical Journal, 2023 The mass ( M _TOV ) and radius ( R _TOV ) of the maximum-mass nonrotating neutron star (NS) play a crucial role in constraining the elusive equation of state of cold dense matter and in predicting the fate of remnants from binary neutron star (BNS ...
Shao-Peng Tang +4 more
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