Question BIG BANG EVIDENCE

[Harry Costas]

And this paper

[Submitted on 26 Apr 2025]

Superradiant dark matter production from primordial black holes: Impact of multiple modes and gravitational wave emission​

Nayun Jia, Shou-Shan Bao, Chen Zhang, Hong Zhang, Xin Zhang

Rotating primordial black holes (PBHs) in the early universe can emit particles through superradiance, a process particularly efficient when the particle's Compton wavelength is comparable to the PBH's gravitational radius. Superradiance leads to an exponential growth of particle occupation numbers in gravitationally bound states. We present an analysis of heavy bosonic dark matter (DM) production through three gravitational mechanisms: Hawking radiation, superradiant instabilities, and ultraviolet (UV) freeze-in. We consider PBHs that evaporate before Big Bang Nucleosynthesis (BBN). For both scalar and vector DM, our analysis incorporates the evolution of a second superradiant mode. We demonstrate that the growth of a second superradiant mode causes the decay of the first mode, and thus the second mode cannot further enhance the DM abundance beyond that already achieved by the first mode. Our study also reveals that while superradiance generally enhances DM production, gravitational wave (GW) emission from the superradiant cloud may significantly modify this picture. For scalar DM, GW emission reduces the parameter space where superradiance effectively augments relic abundance. For vector DM, rapid GW emission from the superradiant cloud may yield relic abundances below those achieved through Hawking radiation alone. These findings demonstrate that multiple-mode effect and GW emission play critical roles in modeling DM production from PBHs in the early universe.

 

[Harry Costas]

Sorry if I have posted some papers again.

 

[Harry Costas]

Just keep reading, the answers to the universe's workings have yet to be resolved.

[Submitted on 5 May 2025]

Pre-geometric Einstein-Cartan Field Equations and Emergent Cosmology​

Giuseppe Meluccio

The field equations of pre-geometric theories of gravity are derived and analysed, both without and with matter. After the spontaneous symmetry breaking that reduces the gauge symmetry of these theories à la Yang-Mills, a metric structure for spacetime emerges and the field equations recover both the Einstein and the Cartan field equations for gravity. A first exact solution of the pre-geometric field equations is also presented. This solution can be considered as a pre-geometric de Sitter universe and provides a possible resolution for the problem of the Big Bang singularity.

 

[Harry Costas]

Answers have yet to resolve the BBT.

[Submitted on 7 May 2025]

Improved Predictions on Higgs-Starobinsky Inflation and Reheating with ACT DR6 and Primordial Gravitational Waves​

Md Riajul Haque, Sourav Pal, Debarun Paul

Improved Predictions on Higgs-Starobinsky Inflation and Reheating with ACT DR6 and Primordial Gravitational Waves

We investigate the implications of recent CMB observations for Higgs-Starobinsky inflationary models and their associated reheating dynamics, utilizing data from ACT DR6, Planck 2018, BICEP/Keck 2018, and DESI, collectively referred to as P-ACT-LB-BK18. In addition to direct CMB constraints, we...

arxiv.org

 

[Harry Costas]

Read this to your hearts content.

The Big Bang is often described as the explosive birth of the Universe – a singular moment when space, time and matter sprang into existence. Source: ScienceAlert https://share.google/tEGw0RwwkNbbhpptv

Shared via the Google app

 

[Harry Costas]

The alternative option is via compaction of Transient Condensates that can mimic Black Hole properties.
The compacted core under chiral supersymmetry, dipolar, and electromagnetic fields produces a vortex that expels matter away from the core.

This paper gives us one option on how Black Holes Form.

We show that, just like for Einstein gravity, the modified junction conditions for these models impose that the dust particles on the star surface follow geodesic trajectories on the corresponding black hole background. Generically, in these models the star collapses until it reaches a minimum size (and a maximum density) inside the inner horizon of the black hole it creates.

Then, it bounces back and reappears through a white hole in a different universe, where it eventually reaches its original size and restarts the process. A

[Submitted on 14 May 2025]

Regular black holes from Oppenheimer-Snyder collapse​

Pablo Bueno, Pablo A. Cano, Robie A. Hennigar, Ángel J. Murcia, Aitor Vicente-Cano

It has been recently shown that regular black holes arise as the unique spherically symmetric solutions of broad families of generalizations of Einstein gravity involving infinite towers of higher-curvature corrections in

spacetime dimensions. In this paper we argue that such regular black holes arise as the byproduct of the gravitational collapse of pressureless dust stars. We show that, just like for Einstein gravity, the modified junction conditions for these models impose that the dust particles on the star surface follow geodesic trajectories on the corresponding black hole background. Generically, in these models the star collapses until it reaches a minimum size (and a maximum density) inside the inner horizon of the black hole it creates. Then, it bounces back and reappears through a white hole in a different universe, where it eventually reaches its original size and restarts the process. Along the way, we study FLRW cosmologies in the same theories that regularize black hole singularities. We find that the cosmological evolution is completely smooth, with the big bang and big crunch singularities predicted by Einstein gravity replaced by cosmological bounces.

 

[Harry Costas]

Imagine monsters growing within a few million years.
It's not possible.

[Submitted on 16 May 2025]

A Cosmic Miracle: A Remarkably Luminous Galaxy at zspec=14.44 confirmed with JWST​

Rohan P. Naidu, Pascal A. Oesch, Gabriel Brammer, Andrea Weibel, Yijia Li, Jorryt Matthee, John Chisholm, Clara L. Pollock, Kasper E. Heintz, Benjamin D. Johnson, Xuejian Shen, Raphael E. Hviding, Joel Leja, Sandro Tacchella, Arpita Ganguly, Callum Witten, Hakim Atek, Sirio Belli, Sownak Bose, Rychard Bouwens, Pratika Dayal, Roberto Decarli, Anna de Graaff, Yoshinobu Fudamoto, Emma Giovinazzo, Jenny E. Greene, Garth Illingworth, Akio K. Inoue, Sarah G. Kane, Ivo Labbe, Ecaterina Leonova, Rui Marques-Chaves, Romain A. Meyer, Erica J. Nelson, Guido Roberts-Borsani, Daniel Schaerer, Robert A. Simcoe, Mauro Stefanon, Yuma Sugahara, Sune Toft, Arjen van der Wel, Pieter van Dokkum, Fabian Walter, Darach Watson, John R. Weaver, Katherine E. Whitaker

A Cosmic Miracle: A Remarkably Luminous Galaxy at $z_{\rm{spec}}=14.44$ Confirmed with JWST

JWST has revealed a stunning population of bright galaxies at surprisingly early epochs, $z>10$, where few such sources were expected. Here we present the most distant example of this class yet -- MoM-z14, a luminous ($M_{\rm{UV}}=-20.2$) source in the COSMOS legacy field at...

arxiv.org