Results 11 to 20 of about 34,160 (259)
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
doaj +4 more sources
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
doaj +5 more sources
Entropy Production During Star Formation: An Analytic Thermodynamic Framework from the Main Sequence to Compact Remnants [PDF]
EntropyThe transformation of a diffuse molecular cloud into a star necessarily increases the entropy of the universe, chiefly through the radiation emitted as gravitational binding energy is released.
Javier Martín-Torres +1 more
doaj +2 more sources
A Nearby Long Gamma-Ray Burst From a Merger of Compact Objects [PDF]
Nature, 2022 Maria Caballero-Garcia +2 more
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
openaire +3 more sources
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
openaire +4 more sources
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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