Results 21 to 30 of about 8,643,173 (282)
Chameleon early dark energy and the Hubble tension [PDF]
Physical Review D, 2021 Early dark energy (EDE) offers a particularly interesting theoretical approach to the Hubble tension, albeit one that introduces its own set of challenges, including a new ‘why then’ problem related to the EDE injection time at matter-radiation equality,
Tanvi Karwal +4 more
semanticscholar +1 more source
Characterizing the Sample Selection for Supernova Cosmology
The Open Journal of Astrophysics, 2021 Type Ia supernovae (SNe Ia) are used as distance indicators to infer the cosmological parameters that specify the expansion history of the universe. Parameter inference depends on the criteria by which the analysis SN sample is selected.
Alex G. Kim +1 more
doaj +1 more source
Combining outlier analysis algorithms to identify new physics at the LHC
Journal of High Energy Physics, 2021 The lack of evidence for new physics at the Large Hadron Collider so far has prompted the development of model-independent search techniques. In this study, we compare the anomaly scores of a variety of anomaly detection techniques: an isolation forest ...
Melissa van Beekveld +9 more
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The Astrophysical Journal, 2023 We perform a rigorous cosmology analysis on simulated Type Ia supernovae (SNe Ia) and evaluate the improvement from including photometric host galaxy redshifts compared to using only the “ z _spec ” subset with spectroscopic redshifts from the host or SN.
Ayan Mitra +4 more
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Testing dark energy after pre-recombination early dark energy
Physics Letters B, 2022 In the studies on pre-recombination early dark energy (EDE), the evolution of Universe after recombination is usually regarded as ΛCDM-like, which corresponds that the equation of state of dark energy responsible for current accelerated expansion is w=−1.
Hao Wang, Yun-Song Piao
doaj +1 more source
290 metagenome-assembled genomes from the Mediterranean Sea: a resource for marine microbiology [PDF]
PeerJ, 2017 The Tara Oceans Expedition has provided large, publicly-accessible microbial metagenomic datasets from a circumnavigation of the globe. Utilizing several size fractions from the samples originating in the Mediterranean Sea, we have used current assembly ...
Benjamin J. Tully +3 more
doaj +2 more sources
Metadetection Weak Lensing for the Vera C. Rubin Observatory
The Open Journal of Astrophysics, 2023 Forthcoming astronomical imaging surveys will use weak gravitational lensing shear as a primary probe to study dark energy, with accuracy requirements at the 0.1% level.
Erin S. Sheldon +4 more
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Constrains on the electric charges of the binary black holes with GWTC-1 events
European Physical Journal C: Particles and Fields, 2021 Testing black hole’s charged property is a fascinating topic in modified gravity and black hole astrophysics. In the first Gravitational-Wave Transient Catalog (GWTC-1), ten binary black hole merger events have been formally reported, and these ...
Hai-Tang Wang +5 more
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Early dark energy does not restore cosmological concordance [PDF]
, 2020 Current cosmological data exhibit a tension between inferences of the Hubble constant, $H_0$, derived from early and late-universe measurements. One proposed solution is to introduce a new component in the early universe, which initially acts as "early ...
J. Hill +4 more
semanticscholar +1 more source
Constraining early dark energy with large-scale structure [PDF]
Physical Review D, 2020 An axion-like field comprising $\sim 10\%$ of the energy density of the universe near matter-radiation equality is a candidate to resolve the Hubble tension; this is the "early dark energy" (EDE) model. However, as shown in Hill et al.
M. Ivanov +6 more
semanticscholar +1 more source