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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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Onset of superradiant instabilities in rotating spacetimes of exotic compact objects
Journal of High Energy Physics, 2017 Exotic compact objects, horizonless spacetimes with reflective properties, have intriguingly been suggested by some quantum-gravity models as alternatives to classical black-hole spacetimes.
Shahar Hod
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On the stability of compact supermassive objects [PDF]
Astronomische Nachrichten, 2001 Proceeded from the gravitation equations proposed by one of authors it was argued in a previous paper that there can exist supermassive compact configurations of degenerated Fermi-gas without events horizon. In the present paper we consider the stability
Kochetov, A., Verozub, L.
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Testing the nature of dark compact objects: a status report
Living Reviews in Relativity, 2019 Very compact objects probe extreme gravitational fields and may be the key to understand outstanding puzzles in fundamental physics. These include the nature of dark matter, the fate of spacetime singularities, or the loss of unitarity in Hawking ...
Vitor Cardoso, Paolo Pani
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A nearby long gamma-ray burst from a merger of compact objects [PDF]
Nature, 2022 Eleonora Troja +2 more
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Astroparticle Physics with Compact Objects
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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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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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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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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Repeating fast radio bursts from collapses of the crust of a strange star
The Innovation, 2021 Summary: Strange stars (SSs) are compact objects made of deconfined quarks. It is hard to distinguish SSs from neutron stars as a thin crust composed of normal hadronic matter may exist and obscure the whole surface of the SS.
Jinjun Geng, Bing Li, Yongfeng Huang
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