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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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Compact objects and the swampland [PDF]
Journal of High Energy Physics, 2019 Recently, two simple criteria were proposed to assess if vacua emerging from an effective scalar field theory are part of the string “landscape” or “swampland”.
Carlos A. R. Herdeiro +2 more
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A nearby long gamma-ray burst from a merger of compact objects [PDF]
Nature, 2022 E Troja, Chris L Fryer, B O'Connor
exaly +2 more sources
Compact objects in entangled relativity [PDF]
Physical Review D, 2021 We describe the first numerical Tolman-Oppenheimer-Volkoff solutions of compact objects in entangled relativity, which is an alternative to the framework of general relativity that does not have any additional free parameter. Assuming a simple polytropic equation of state and the conservation of the rest-mass density, we notably show that, for any ...
Denis Arruga +2 more
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Rates of compact object coalescences [PDF]
Living Reviews in Relativity, 2022 AbstractGravitational-wave detections are enabling measurements of the rate of coalescences of binaries composed of two compact objects—neutron stars and/or black holes. The coalescence rate of binaries containing neutron stars is further constrained by electromagnetic observations, including Galactic radio binary pulsars and short gamma-ray bursts ...
Ilya Mandel, Floor S. Broekgaarden
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European Physical Journal C: Particles and FieldsSelf-gravitating horizonless ultra-compact objects that possess light rings have attracted the attention of physicists and mathematicians in recent years.
Shahar Hod
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On thermodynamics of compact objects
Classical and Quantum Gravity, 2023 Abstract With the recent progress in observations of astrophysical black holes, it has become more important to understand in detail the physics of strongly gravitating horizonless objects. If the objects identified in the observations are indeed horizonless and ultracompact, high curvature effects may become important, and their ...
Ufuk Aydemir, Jing Ren
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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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