Results 91 to 100 of about 176,413 (293)

Primordial Gas Collapse in The Presence of Radiation: Direct Collapse Black Hole or Population III star?

, 2018
The first billion years in the evolution of the Universe mark the formation of the first stars, black holes and galaxies. The radiation from the first galaxies plays an important role in determining the final state of primordial gas collapsing in a ...
Agarwal, Bhaskar
core   +1 more source

Holographic Principle bounds on Primordial Black Hole abundances [PDF]

, 2003
The generalized Second Law of thermodynamics and the Holographic Principle are combined to obtain the maximum mass of black holes formed inside a static spherical box of size $R$ filled with radiation at initial temperature $T_{i}$. The final temperature
Bekenstein J, Bekenstein J, Bigatti D, Bousso R, Carr B, Carr B, Custódio P S, Custódio P S, Green A M, Guth A H, Hawking S W, Ivanov M G, J E Horvath, Jacobson T, Kolb E W, Linde A, Mukohyama S, P S Cust dio, Verlinde E, Youm D, Zel'dovich Ya B   +20 more
core   +2 more sources

Phantasmic Encounters in the Arctic: Haunting Materialities Beyond the Ghosts of War

Anthropology of Consciousness, EarlyView.
ABSTRACT In the vast north, ghostly experiences are common for locals and outsiders alike. Here, we explore how cultural‐natural attributes, like remoteness and extreme seasonal variation, compound experiences of the haunting in visceral ways. This provides the Arctic region with an unusually pronounced baseline of other‐than‐human agency, which in the
Aki Hakonen, Oula Seitsonen
wiley   +1 more source

Multi-messenger probes of asteroid mass primordial black holes: Superradiance spectroscopy, Hawking radiation, and microlensing

Physics Letters B
Superradiance provides a unique opportunity for investigating dark sectors as well as primordial black holes, which themselves are candidates for dark matter over a wide mass range.
James B. Dent, Bhaskar Dutta, Tao Xu
doaj   +1 more source

Evaporation of a Kerr black hole by emission of scalar and higher spin particles [PDF]

, 1998
We study the evolution of an evaporating rotating black hole, described by the Kerr metric, which is emitting either solely massless scalar particles or a mixture of massless scalar and nonzero spin particles.
Brett E. Taylor, C. Flammer, C. M. Chambers, Chris M. Chambers, D. N. Page, D. N. Page, S. A. Teukolsky, T. Elster, W. H. Press, W. H. Press, W. H. Press, William A. Hiscock   +11 more
core   +4 more sources

Golden weapons and golden fetters: From the gold standard to the new geopolitics

The Economic History Review, EarlyView.
Abstract This paper explores the historical relationship between monetary regimes, security concerns, and geopolitical tensions, particularly focusing on the role of gold. Throughout history, monetary systems have been deeply intertwined with international state systems and security provisions.
Harold James
wiley   +1 more source

Black Component of Dark Matter

Advances in High Energy Physics, 2014
A mechanism of primordial black hole formation with specific mass spectrum is discussed. It is shown that these black holes could contribute to the energy density of dark matter. Our approach is elaborated in the framework of universal extra dimensions.
A. V. Grobov, S. G. Rubin, V. Yu. Shalamova   +2 more
doaj   +1 more source

Renormalized primordial black holes

Journal of Cosmology and Astroparticle Physics
Abstract The formation of primordial black holes in the early universe may happen through the collapse of large curvature perturbations generated during a non-attractor phase of inflation or through a curvaton-like dynamics after inflation. The fact that such small-scale curvature perturbation is typically non-Gaussian leads to the
G. Franciolini, A. Ianniccari, A. Kehagias, D. Perrone, A. Riotto   +4 more
openaire   +3 more sources

Impact of LIGO-Virgo black hole binaries on gravitational wave background searches

European Physical Journal C: Particles and Fields, 2023
We study the impact of the black hole binary population currently probed by LIGO-Virgo on future searches for the primordial gravitational wave background.
Marek Lewicki, Ville Vaskonen
doaj   +1 more source

Implications of primordial black holes on the first stars and the origin of the super--massive black holes [PDF]

, 2009
If the cosmological dark matter has a component made of small primordial black holes, they may have a significant impact on the physics of the first stars and on the subsequent formation of massive black holes.
Abel, Abramowicz, Alcock, Alexander D. Dolgov, Bambi, Barkana, Begelman, Begelman, Binney, Bisnovatyi-Kogan, Bondi, Bromm, Bromm, Carr, Carr, Carr, Ciotti, Cosimo Bambi, Crawford, Dolgov, Douglas Spolyar, Freese, Freese, Gould, Haiman, Hawke, Hawking, Hawking, Hawking, Hawking, Heger, Hollenbach, Jedamzik, Katherine Freese, Li, MacFadyen, Marani, Marta Volonteri, Matsuda, McKee, Navarro, Nemiroff, Novikov, Omukai, Page, Page, Peebles, Pelupessy, Polnarev, Rubin, Sellwood, Seto, Shapiro, Silk, Spolyar, Springel, Tegmark, Tisserand, Volonteri, Volonteri, Yoshida, Yoshida, Zeldovich   +62 more
core   +1 more source