Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity
In this work we analyze kinematical conformal cosmology (KCC), an alternative cosmological model based on conformal Weyl gravity (CG), and test it against current type Ia supernova (SNIa) luminosity data and other astrophysical observations. Expanding upon previous work on the subject, we revise the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-12-01
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| Series: | Galaxies |
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| Online Access: | http://www.mdpi.com/2075-4434/2/4/577 |
| _version_ | 1811263211389845504 |
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| author | Gabriele U. Varieschi |
| author_facet | Gabriele U. Varieschi |
| author_sort | Gabriele U. Varieschi |
| collection | DOAJ |
| description | In this work we analyze kinematical conformal cosmology (KCC), an alternative cosmological model based on conformal Weyl gravity (CG), and test it against current type Ia supernova (SNIa) luminosity data and other astrophysical observations. Expanding upon previous work on the subject, we revise the analysis of SNIa data, confirming that KCC can explain the evidence for an accelerating expansion of the Universe without using dark energy or other exotic components. We obtain an independent evaluation of the Hubble constant, H0 = 67:53 kms-1 Mpc-1, very close to the current best estimates. The main KCC and CG parameters are re-evaluated and their revised values are found to be close to previous estimates. We also show that available data for the Hubble parameter as a function of redshift can be fitted using KCC and that this model does not suffer from any apparent age problem. Overall, |
| first_indexed | 2024-04-12T19:41:55Z |
| format | Article |
| id | doaj.art-3869350326ac4c889bc14fd16af72cb0 |
| institution | Directory Open Access Journal |
| issn | 2075-4434 |
| language | English |
| last_indexed | 2024-04-12T19:41:55Z |
| publishDate | 2014-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Galaxies |
| spelling | doaj.art-3869350326ac4c889bc14fd16af72cb02022-12-22T03:19:04ZengMDPI AGGalaxies2075-44342014-12-012457760010.3390/galaxies2040577galaxies2040577Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl GravityGabriele U. Varieschi0Department of Physics, Loyola Marymount University, Los Angeles, CA 90045, USAIn this work we analyze kinematical conformal cosmology (KCC), an alternative cosmological model based on conformal Weyl gravity (CG), and test it against current type Ia supernova (SNIa) luminosity data and other astrophysical observations. Expanding upon previous work on the subject, we revise the analysis of SNIa data, confirming that KCC can explain the evidence for an accelerating expansion of the Universe without using dark energy or other exotic components. We obtain an independent evaluation of the Hubble constant, H0 = 67:53 kms-1 Mpc-1, very close to the current best estimates. The main KCC and CG parameters are re-evaluated and their revised values are found to be close to previous estimates. We also show that available data for the Hubble parameter as a function of redshift can be fitted using KCC and that this model does not suffer from any apparent age problem. Overall,http://www.mdpi.com/2075-4434/2/4/577modified theories of gravityconformal gravityconformal cosmologytype Ia supernovaestandard candlescosmic chronometers |
| spellingShingle | Gabriele U. Varieschi Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity Galaxies modified theories of gravity conformal gravity conformal cosmology type Ia supernovae standard candles cosmic chronometers |
| title | Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity |
| title_full | Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity |
| title_fullStr | Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity |
| title_full_unstemmed | Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity |
| title_short | Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl Gravity |
| title_sort | astrophysical tests of kinematical conformal cosmology in fourth order conformal weyl gravity |
| topic | modified theories of gravity conformal gravity conformal cosmology type Ia supernovae standard candles cosmic chronometers |
| url | http://www.mdpi.com/2075-4434/2/4/577 |
| work_keys_str_mv | AT gabrieleuvarieschi astrophysicaltestsofkinematicalconformalcosmologyinfourthorderconformalweylgravity |