Results 1 to 10 of about 2,640,441 (306)
Neural network reconstructions for the Hubble parameter, growth rate and distance modulus [PDF]
European Physical Journal C: Particles and Fields, 2023 This paper introduces a new approach to reconstruct cosmological functions using artificial neural networks based on observational measurements with minimal theoretical and statistical assumptions.
Isidro Gómez-Vargas +3 more
doaj +4 more sources
A new analytical solution for the distance modulus in flat cosmology [PDF]
The International Journal of Astronomy and Astrophysics
(2019),9,51-62, 2019 A new analytical solution for the luminosity distance in flat $\Lambda$CDM cosmology is derived in terms of elliptical integrals of first kind with real argument. The consequent derivation of the distance modulus allows evaluating the Hubble constant, $H_0=69.77\pm 0.33$, $\om= 0.295\pm0.008$ and the cosmological constant, $\Lambda= (1.194 \pm 0.017)10^
Lorenzo Zaninetti
arxiv +5 more sources
Direct evidence of acceleration from distance modulus redshift graph [PDF]
JCAP0708:018,2007, 2007 The energy conditions give upper bounds on the luminosity distance. We apply these upper bounds to the 192 essence supernova Ia data to show that the Universe had experienced accelerated expansion. This conclusion is drawn directly from the distance modulus-reshift graph.
Yungui Gong +3 more
arxiv +5 more sources
Sparse Formulae for the Distance Modulus in Cosmology [PDF]
, 2021 We review the distance modulus in twelve different cosmologies: the ΛCDM model, the wCDM model, the Cardassian model, the flat case, the φCDM cosmology, the Einstein–De Sitter model, the modified Einstein– De Sitter model, the simple GR model, the flat ...
Lorenzo Zaninetti
openalex +3 more sources
On the Distance Modulus of the Large Magellanic Cloud [PDF]
, 1980 The corrected modulus = 18.31 ± 0.15 (external m.e.) previously derived from five independent primary distance indicators is confirmed by nine different secondary and tertiary indicators which give = 18.20 ± 0.10 (internal mean error) on the same system ...
G. de Vaucouleurs
semanticscholar +3 more sources
A New Red Giant–based Distance Modulus of 13.3 Mpc to the Antennae Galaxies and Its Consequences1 [PDF]
, 2008 The Antennae galaxies are the closest example of an ongoing major galaxy merger and, as such, represent a unique laboratory for furthering the understanding of the formation of exotic objects (e.g., tidal dwarf galaxies, ultraluminous X-ray sources ...
I. Saviane +4 more
openalex +3 more sources
The Near-IR TRGB Magnitude and Distance Modulus to NGC 185 [PDF]
Journal of Astronomy and Space Sciences, 2008 We determined values of distance modulus to nearby dwarf galaxy NGC 185 from the Tip of Red-Giant Branch (TRGB) method. Apparent magnitudes of the TRGB are estimated from the near-infrared JHK luminosity functions (LFs) of the resolved giant branch stars.
Y.-J. Sohn +7 more
doaj +3 more sources
Progressive Fracture Behavior and Acoustic Emission Release of CJBs Affected by Joint Distance Ratio
Mathematics, 2022 The progressive collapse behavior and energy release of columnar jointed basalts (CJBs) can be greatly influenced by different joint distance ratios. By adopting the digital image correlation, a series of heterogeneous CJB models are established.
Yongyi Wang +4 more
doaj +2 more sources
The distance modulus of the Small Magellanic Cloud based on double-mode Cepheids [PDF]
Astron. Astrophys., Vol. 360, L1-4 (2000), 2000 We employ the very recent photometric data of the OGLE project together with stellar atmosphere and linear pulsation models to determine the distance modulus of the Small Magellanic Cloud from its double-mode Cepheids. Based on the requirement of obtaining the same distance modulus DM from the two types of variables (fundamental & first overtone and ...
G. Kovács
arxiv +3 more sources
Near-IR TRGB Distance Modulus of Dwarf Irregular Galaxy IC 1613 [PDF]
Journal of Astronomy and Space Sciences, 2009 The JHKs magnitudes of the red giant branch tip (TRGB) and the distance moduli of the nearby dwarf irregular galaxy IC 1613 have been determined from the nearinfrared luminosity functions (LFs) of the resolved stars in the galaxy.
M. Y. Jung +6 more
doaj +3 more sources