Zobrazeno 1 - 10
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pro vyhledávání: '"Lee, Seokcheon"'
The significance of measuring cosmological time dilation in the Dark Energy Survey Supernova Program
Autor:
Lee, Seokcheon
Publikováno v:
Physics of the Dark Universe 46, 101703 (2024)
In the context of the dispersion relation $c = \lambda \nu$ and considering an expanding universe where the observed wavelength today is redshifted from the emitted wavelength by $\lambda_{0} = \lambda_{\text{emit}} (1+z)$, to keep $c$ constant, it m
Externí odkaz:
http://arxiv.org/abs/2407.09532
Autor:
Lee, Seokcheon
Publikováno v:
Astronomy 2024, 3(2), 100-113
Cosmography, as an integral branch of cosmology, strives to characterize the Universe without relying on pre-determined cosmological models. This model-independent approach utilizes Taylor series expansions around the current epoch, providing a direc
Externí odkaz:
http://arxiv.org/abs/2406.05990
Autor:
Lee, Seokcheon
Publikováno v:
Particles 2024, 7(2), 309-326
It has been known that dimensional constants such as $\hbar$, $c$, $G$, $e$, and $k$ are merely human constructs whose values and units vary depending on the chosen system of measurement. Therefore, the time variation of dimensional constants lacks o
Externí odkaz:
http://arxiv.org/abs/2406.02556
Autor:
Lee, Seokcheon
In the expanding Universe, the dimensional quantities like the wavelength and the temperature of photons are cosmologically redshifted by the relative difference between the observed and emitted ones. Therefore, it can be physically meaningful to tal
Externí odkaz:
http://arxiv.org/abs/2305.09367
Autor:
Lee, Seokcheon
Publikováno v:
Foundations of Physics, 53, 40 (2023)
The Robertson-Walker (RW) metric allows us to apply general relativity to model the behavior of the Universe as a whole (i.e., cosmology). We can properly interpret various cosmological observations, like the cosmological redshift, the Hubble paramet
Externí odkaz:
http://arxiv.org/abs/2303.13772
Autor:
Lee, Seokcheon
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 524, Issue 3, September 2023, 4019-4023
The Friedmann-Lema\^{i}tre-Robertson-Walker model establishes the correlation between redshifts and distances. It has a metric expansion of space. As a result, the wavelength of photons propagating through the expanding space is stretched, creating t
Externí odkaz:
http://arxiv.org/abs/2302.09735
Autor:
Lee, Seokcheon
Publikováno v:
MNRAS 522, 3248-3255 (2023)
At least one dimensionless physical constant (i.e., a physically observable) must change for the cosmic time to make the varying speed of light (VSL) models phenomenologically feasible. Various physical constants and quantities also should be functio
Externí odkaz:
http://arxiv.org/abs/2301.06947
Autor:
Lee, Seokcheon
Publikováno v:
Physics of the Dark Universe Physics of the Dark Universe, Volume 42, December 2023, 101286
There have been various varying speed of light (VSL) models with one free parameter, $b$, to characterize the time variation of the speed of light as a function of a scale factor, $c = c_0a^{b/4}$, based on the expanding universe. One needs to induce
Externí odkaz:
http://arxiv.org/abs/2212.03728
Publikováno v:
In Computers & Industrial Engineering November 2024 197
Understanding the dynamics of food banks' demand from food insecurity is essential in optimizing operational costs and equitable distribution of food, especially when demand is uncertain. Hence, Gaussian Mixture Model (GMM) clustering is selected to
Externí odkaz:
http://arxiv.org/abs/2202.01347