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DARK ENERGY WITH DARK SPINORS [PDF]
Modern Physics Letters A, 2010 Ever since the first observations that we are living in an accelerating universe, it has been asked what dark energy is. There are various explanations, all of which have various drawbacks or inconsistencies. Here we show that using a dark spinor field it is possible to have an equation of state that crosses the phantom divide, becoming a dark phantom
James Burnett, Christian G. Böhmer
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Observational constraints on Barrow holographic dark energy [PDF]
The European Physical Journal C, 2020 We use observational data from Supernovae (SNIa) Pantheon sample, as well as from direct measurements of the Hubble parameter from the cosmic chronometers (CC) sample, in order to extract constraints on the scenario of Barrow holographic dark energy. The
Fotios Anagnostopoulos +2 more
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Physical Review D, 2020 We present a novel source of dark energy, which is motivated by the prevalence of hidden sectors in string theory models and is consistent with all of the proposed swampland conjectures. Thermal effects hold a light hidden sector scalar at a point in field space that is not a minimum of its zero temperature potential.
Edward Hardy, Susha Parameswaran
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Hot new early dark energy: Towards a unified dark sector of neutrinos, dark energy and dark matter
Physics Letters B, 2022 Hot new early dark energy describes a supercooled, first-order phase transition that takes place at sub-eV temperatures in the dark sector. It lowers the sound horizon, which provides a possible solution to the Hubble tension, and, at the same time, it ...
Florian Niedermann, Martin S. Sloth
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Barrow holographic dark energy [PDF]
Physical Review D, 2020 We formulate Barrow holographic dark energy, by applying the usual holographic principle at a cosmological framework, but using the Barrow entropy instead of the standard Bekenstein-Hawking one.
E. Saridakis
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Influence of quintessence dark energy on the shadow of black hole [PDF]
The European Physical Journal C, 2020 We investigate the effects of quintessence dark energy on the shadows of black hole, surrounded by various profiles of accretions. For the thin-disk accretion, the images of the black hole comprises the dark region and bright region, including direct ...
Xiao-Xiong Zeng, Hai-Qing Zhang
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The Astronomical Journal, 2023 We present a study of the potential for convolutional neural networks (CNNs) to enable separation of astrophysical transients from image artifacts, a task known as “real–bogus” classification, without requiring a template-subtracted (or difference) image,
Tatiana Acero-Cuellar +5 more
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DESI 2024: reconstructing dark energy using crossing statistics with DESI DR1 BAO data [PDF]
Journal of Cosmology and Astroparticle PhysicsWe implement Crossing Statistics to reconstruct in a model-agnostic manner the expansion history of the universe and properties of dark energy, using DESI Data Release 1 (DR1) BAO data in combination with one of three different supernova compilations ...
R. Calderon +54 more
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, 2006 We review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating universe. In particular we discuss the arguments for and recent progress made towards understanding the nature of dark ...
Edmund J. Copeland +2 more
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DESI 2024: Constraints on physics-focused aspects of dark energy using DESI DR1 BAO data [PDF]
Physical Review DBaryon acoustic oscillation data from the first year of the Dark Energy Spectroscopic Instrument (DESI) provide near percent-level precision of cosmic distances in seven bins over the redshift range $z=0.1$-$4.2$.
K. Lodha +48 more
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