Results 41 to 50 of about 1,546,467 (200)
The Possibility of a Multi-fold Time-Varying Hubble Constant
, 2023 The multi-fold theory provides microscopic interpretations to the universe accelerated expansion, inflation mechanisms and dark energy. From the beginning, the multi-fold dark matter main mechanisms have been identified as being stronger in the presence ...
Stephane Maes
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The Astrophysical Journal, 2023 We compare infrared surface brightness fluctuation (IR SBF) distances measured in galaxies that have hosted type Ia supernovae (SNe Ia) to distances estimated from SNe Ia light-curve fits.
Peter Garnavich +8 more
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Unimodular Theory of Gravity in Light of the Latest Cosmological Data
Universe, 2023 The unimodular theory of gravity is an alternative perspective to the traditional general relativity of Einstein and opens new possibilities for exploring its implications in cosmology.
Naveen K. Singh, Gopal Kashyap
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Revisiting the Oldest Stars as Cosmological Probes: New Constraints on the Hubble Constant
The Astrophysical Journal, 2023 Despite the tremendous advance of observational cosmology, the value of the Hubble constant ( H _0 ) is still controversial (the so-called “Hubble tension”) because of the inconsistency between local/late-time measurements and those derived from the ...
Andrea Cimatti, Michele Moresco
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Investigating the Hubble tension: Effect of cepheid calibration
Physics Letters B, 2023 Recent observations of Type Ia supernovae (SNe) by SH0ES collaboration (R11 and R16) diverge from the value reported by recent CMBR observations utilising the Planck satellite and application of the ΛCDM cosmological model by at least 3σ. It is among the
Rahul Kumar Thakur +4 more
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H0 tension in torsion-based modified gravity
Nuclear Physics B, 2023 The rising concern in the Hubble constant tension (H0 tension) of the cosmological models motivates the scientific community to search for alternative cosmological scenarios that could resolve the H0 tension.
Sanjay Mandal +3 more
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The Astrophysical Journal, 1998 18 pages; figure[1-2,7-9].ps are EPS files included in body of text, figure[3-6].jpg are JPEG images not included; LaTeX (AASTeX v4.0); Submitted to The Astrophysical Journal. Compressed PostScript of entire paper with all figures included is available at ftp://mars.tuc.noao.edu/sbf/hubble.ps ...
Lauer, Tod R. +4 more
openaire +2 more sources
Geometric Characterization of LEO–GEO Inter‐Satellite Links for Bidirectional Communications
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT Incorporating geosynchronous Earth orbit (GEO) and low Earth orbit (LEO) satellites can extend communication services far beyond the reach of terrestrial infrastructure. A key enabler of such architectures is the establishment of inter‐satellite links (ISLs) between LEOs and GEOs to support bidirectional communications.
Muhammad Furqan +2 more
wiley +1 more source
Variability of Saturn's Equatorial Zonal Winds at Cloud Level Between 2018 and 2025
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Saturn's zonal wind profile at cloud level has been measured at different epochs since the Voyager 1 and 2 in 1980–81. At most latitudes, zonal winds change little over time. However, the equatorial region, between planetographic latitudes 10°N and 10°S, presents a complex vertical structure and significant variability.
Aida Flix‐Bellmunt +7 more
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The Astrophysical Journal LettersWe present high-definition observations with the James Webb Space Telescope (JWST) of >1000 Cepheids in a geometric anchor of the distance ladder, NGC 4258, and in five hosts of eight Type Ia supernovae, a far greater sample than previous studies with ...
Adam G. Riess +9 more
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