Low redshift constraints on scale-covariant models
Sign Up to like & getrecommendations! Published in 2022 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2022.100964
Abstract: The search for a physical model which explains the observed recent acceleration of the universe is a compelling task of modern fundamental cosmology. Recently Fernandes et al. presented low redshift observational constraints on a scale… read more here.
Keywords: constraints scale; redshift constraints; cosmological constant; low redshift ... See more keywords
An optical perspective on the theory of relativity -â…˘: Gravitational redshift
Sign Up to like & getrecommendations! Published in 2020 at "Optik"
DOI: 10.1016/j.ijleo.2020.165684
Abstract: Abstract By using the concept of a space-time ruler, the clock difference between the clocks on two aircraft flying around the world, one east and one west, along the equator and a clock fixed on… read more here.
Keywords: optical perspective; generalized hamiltonian; theory relativity; gravitational redshift ... See more keywords
A novel redshift mechanism of Ce3+ emission in ZrO2-Ce: YAG composite phosphor ceramics
Sign Up to like & getrecommendations! Published in 2020 at "Journal of The European Ceramic Society"
DOI: 10.1016/j.jeurceramsoc.2020.06.026
Abstract: Abstract In this work, ZrO2-Ce: YAG composite phosphor ceramic for the application of high brightness w-LEDs was fabricated for the first time. A novel redshift mechanism of Ce3+ emission is discovered in the composite ceramics… read more here.
Keywords: zro2 yag; yag composite; composite phosphor; ce3 emission ... See more keywords
Cosmological Inference from Host-Selected Type Ia Supernova Samples
Sign Up to like & getrecommendations! Published in 2017 at "Publications of the Astronomical Society of Australia"
DOI: 10.1017/pasa.2017.2
Abstract: Abstract We compare two Type Ia supernova samples that are drawn from a spectroscopically confirmed Type Ia supernova sample: a host-selected sample in which SNe Ia are restricted to those that have a spectroscopic redshift… read more here.
Keywords: supernova samples; type supernova; host selected; host ... See more keywords
Extreme quasars at high redshift
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201833541
Abstract: Context:Quasars radiating at extreme Eddington ratios (xA) are likely a prime mover of galactic evolution and have been hailed as potential distance indicators. Their properties are still scarcely known. Aims:We test the effectiveness of the… read more here.
Keywords: siiii 1892; high redshift; quasars high; extreme quasars ... See more keywords
Photoexcited Blueshift and Redshift Switchable Metamaterial Absorber at Terahertz Frequencies
Sign Up to like & getrecommendations! Published in 2019 at "Chinese Physics Letters"
DOI: 10.1088/0256-307x/36/12/124202
Abstract: We propose a design and numerical study of an optically blueshift and redshift switchable metamaterial (MM) absorber in the terahertz regime. The MM absorber comprises a periodic array of metallic split-ring resonators (SRRs) with semiconductor… read more here.
Keywords: switchable metamaterial; redshift switchable; absorber; metamaterial absorber ... See more keywords
High-redshift post-reionization cosmology with 21cm intensity mapping
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/05/004
Abstract: We investigate the possibility of performing cosmological studies in the redshift range $2.5 read more here.
Keywords: cosmology; sigma; 21cm intensity; intensity mapping ... See more keywords
Quantifying the evidence for the current speed-up of the Universe with low and intermediate-redshift data. A more model-independent approach
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/05/026
Abstract: We reconstruct in this paper the deceleration and jerk parameters as functions of the cosmological redshift from data on cosmic chronometers (CCH), baryon acoustic oscillations (BAOs), and the Pantheon+MCT compilation of supernovae of Type Ia… read more here.
Keywords: universe; evidence; model; redshift data ... See more keywords
Constraining neutrino mass with weak lensing Minkowski Functionals
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/06/019
Abstract: The presence of massive neutrinos affects structure formation, leaving imprints on large-scale structure observables such as the weak lensing field. The common lensing analyses with two-point statistics are insensitive to the large amount of non-Gaussian… read more here.
Keywords: neutrino mass; minkowski functionals; mass; weak lensing ... See more keywords
Speeding up the detectability of the harmonic-space galaxy bispectrum
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/01/002
Abstract: We present a method that allows us for the first time to estimate the signal-to-noise ratio (SNR) of the harmonic-space galaxy bispectrum induced by gravity, a complementary probe to already well established Fourier-space clustering analyses.… read more here.
Keywords: space galaxy; galaxy; space; harmonic space ... See more keywords
Outlier Prediction and Training Set Modification to Reduce Catastrophic Outlier Redshift Estimates in Large-scale Surveys
Sign Up to like & getrecommendations! Published in 2020 at "Publications of the Astronomical Society of the Pacific"
DOI: 10.1088/1538-3873/abe5fb
Abstract: We present results of using individual galaxies’ probability distribution over redshift as a method of identifying potential catastrophic outliers in empirical photometric redshift estimation. In the course of developing this approach we develop a method… read more here.
Keywords: large scale; training set; catastrophic outlier; percentage ... See more keywords