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Locally Varying Hubble Parameter in Terms of Reduced Friedmann Equation
Egyptair, Cairo, Egypt
- 1 Egyptair, Cairo, Egypt
International Journal of Astronomy and Astrophysics·Volume 11 (2021)·Pages 175–189·Published 26 May 2021·DOI10.4236/ijaa.2021.112010
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Abstract
Assessment of the Hubble parameter as an indicator of the expansion rate of the universe holds a central position in the field of astronomy. From its initial estimate of about 500 km ⋅ sec -1 ⋅ parsc -1 , this value had been steadily amended as the observational tools became more accurate and precise. Despite this, a gap remains between the value of observations relating to local and nonlocal estimations of the Hubble parameter that gave rise to what became known as the Hubble tension. This tension is addressed here while dealing with space fabric as a cosmological fluid that undergoes transition.
KeywordsCosmic Fluid TransitionLocally Varying Hubble ParameterEnergy Degrees of Freedom
- Riess, A.G., Casertano, S., Yuan, W., Macri, L.M. and Scolnic, D. (2019) Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics beyond ΛCDM. Astrophysical Journal, 876, 85. https://doi.org/10.3847/1538-4357/ab1422
- Wong, K.C., Suyu, S.H., Chen, G.F., Rusu, C.L., et al. (2019) H0LiCOW—XIII. A 2.4 per cent Measurement of H 0 from Lensed Quasars: 5.3σ Tension between Early- and Late-Universe Probe. Monthly Notices of the Royal Astronomical Society, 498, 1420-1439. https://doi.org/10.1093/mnras/stz3094
- De Jaeger, T., Stahl, B.E., Zheng, W., Filippenko, A.V., Riess, A.G. and Galbany, L. (2020) A Measurement of the Hubble Constant from Type II Supernovae. Monthly Notices of the Royal Astronomical Society, 496, 3402-3411. https://doi.org/10.1093/mnras/staa1801
- Huang, C.D., Riess, A.G., Yuan, W., Macri, L.M., Zakamska, N.L., Casertano, S., et al. (2020) Hubble Space Telescope Observations of Mira Variables in the SN Ia Host NGC 1559: An Alternative Candle to Measure the Hubble Constant. The Astrophysical Journal, 889, 5. https://doi.org/10.3847/1538-4357/ab5dbd
- Aghanim, N., Akrami, Y., Ashdown, M., et al. (2020) Planck 2018 Results VI. Cosmological Parameters. Astronomy & Astrophysics, 641, A6.
- Aiola, S., Calabrese, E., Maurin, L., Naess, S., Schmitt, B.L., et al. (2020) The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters. Journal of Cosmology and Astroparticle Physics, 12, 047. https://doi.org/10.1088/1475-7516/2020/12/047
- Aghanim, N., Akrami, Y., Ashdown, M., et al. (2020) Planck 2018 Results. V. CMB Power Spectra and Likelihoods. Astronomy & Astrophysical Journal, 641, A5.
- Ade, P.A.R., Aghanim, N., Arnaud, M., et al. (2016) Planck 2015 Results XIII. Cosmological Parameters. Astronomy &Astrophysics, 594, A13.
- Kassem, A. (2020) Symmetries in the Universe, a Quanton Origin. International Astronomy and Astrophysics Research Journal, 2, 52-70. http://www.journaliaarj.com/index.php/IAARJ/article/view/27
- Kassem, A. (n.d.) Quanton Based Model of Field Interactions. http://vixra.org/abs/1912.0314
- Das, S. and Roychowdhury, D. (2020) Thermodynamics of a Photon Gas with an Invariant Energy Scale. Physical Review D, 81, Article ID: 085039. http://doi.org/10.1103/PhysRevD.81.085039
- Mansuripur, M. and Han, P. (2017) Thermodynamics of Radiation Pressure and Photon Momentum. Dholakia, K. and Spalding, G.C., Eds., Optical Trapping and Optical Micromanipulation XIV, Proceedings of SPIE Vol. 10347, 1-20. http://doi.org/10.1117/12.2274589