Results 81 to 90 of about 38,497 (193)

Cosmological implications of primordial black holes [PDF]

Journal of Cosmology and Astroparticle Physics, 2017
20 pages, 9 figures.
Luis Bernal J., Bellomo N., Raccanelli A., Verde L.   +3 more
openaire   +3 more sources

Massive and supermassive black holes in the contemporary and early universe and the new problems of cosmology and astrophysics

, 2017
This is the translation into English of the introduction, conclusion, and the list of references of the review on massive primordial black holes, which is submitted in Russian to Uspekhi Fizicheskikh Nauk (Physics-Uspekhi).
Dolgov, A. D.
core   +1 more source

Massive Primordial Black Holes [PDF]

Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019), 2020
21 page, presented at Multifrequency Behaviour of High Energy Cosmic Sources - XIII - MULTIF2019, 3-8 June 2019; Palermo ...
openaire   +2 more sources

Quantum formation of primordial black holes [PDF]

General Relativity and Gravitation, 2019
We provide a (simplified) quantum description of primordial black holes at the time of their formation. Specifically, we employ the horizon quantum mechanics to compute the probability of black hole formation starting from a simple quantum mechanical characterization of primordial density fluctuations given by a Planckian spectrum. We then estimate the
Casadio, Roberto, Giugno, Andrea, Giusti, Andrea, Lenzi, Michele   +3 more
openaire   +4 more sources

Amazonian fish migration as a social–cultural–ecological process

People and Nature, Volume 7, Issue 12, Page 3297-3312, December 2025.
Abstract In this study, we highlight the rich perspectives and explanations of fish migration held by Indigenous groups across the Amazon. We present the aspects of Indigenous cosmological stories, drawing from our exploratory review of cultural ethnographies and grey literature, as well as the authors' own experiences. We ask, how do Amazonian peoples
LuLu Victoria‐Lacy, Thiago B. A. Couto, Natalia C. Piland, Jesús Dámaso, Stephannie Fernandes, Simone Athayde, Elizabeth P. Anderson   +6 more
wiley   +1 more source

Hawking Radiation from non-evaporating primordial black holes cannot enable the formation of direct collapse black holes

The Open Journal of Astrophysics
The formation of supermassive black holes (SMBHs) in the early Universe is a subject of significant debate. In this study, we examine whether non-evaporating primordial black holes (PBHs) can offer a solution.
Jonathan Regan, Marios Kalomenopoulos, Kelly Kosmo O'Neil   +2 more
doaj   +1 more source

Cosmological Constraints from Primordial Black Holes

, 1998
Primordial black holes may form in the early Universe, for example from the collapse of large amplitude density perturbations predicted in some inflationary models.
Andrew R Liddle, Anne M Green, Barrow, Bullock, Carr, Green, Green, Ivanov, Lindley, Lyth   +9 more
core   +2 more sources

Guises of Despair

European Journal of Philosophy, EarlyView.
Béatrice Han‐Pile
wiley   +1 more source

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

Implications of pulsar timing array data for scalar-induced gravitational waves and primordial black holes: Primordial non-Gaussianity f_{NL} considered

Physical Review Research
Multiple pulsar-timing-array collaborations have reported strong evidence for the existence of a gravitational-wave background. We study physical implications of this signal for cosmology, assuming that it is attributed to scalar-induced gravitational ...
Sai Wang, Zhi-Chao Zhao, Jun-Peng Li, Qing-Hua Zhu   +3 more
doaj   +1 more source