SNe Ia Redshift in a Nonadiabatic Universe
By relaxing the constraint of adiabatic universe used in most cosmological models, we have shown that the new approach provides a better fit to the supernovae Ia redshift data with a single parameter, the Hubble constant H0, than the standard ΛCDM model with two parameters, H0 and the cos...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-10-01
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| Series: | Universe |
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| Online Access: | http://www.mdpi.com/2218-1997/4/10/104 |
| _version_ | 1811303655028031488 |
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| author | Rajendra P. Gupta |
| author_facet | Rajendra P. Gupta |
| author_sort | Rajendra P. Gupta |
| collection | DOAJ |
| description | By relaxing the constraint of adiabatic universe used in most cosmological models, we have shown that the new approach provides a better fit to the supernovae Ia redshift data with a single parameter, the Hubble constant H0, than the standard ΛCDM model with two parameters, H0 and the cosmological constant Λ related density, ΩΛ. The new approach is compliant with the cosmological principle. It yields the H0 = 68.28 (±0.53) km s−1 Mpc−1 with an analytical value of the deceleration parameter q0 = −0.4. The analysis presented is for a matter-only, flat universe. The cosmological constant Λ may thus be considered as a manifestation of a nonadiabatic universe that is treated as an adiabatic universe. |
| first_indexed | 2024-04-13T07:50:51Z |
| format | Article |
| id | doaj.art-febae85d8b374862b18d732b9d63a3f7 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-04-13T07:50:51Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-febae85d8b374862b18d732b9d63a3f72022-12-22T02:55:32ZengMDPI AGUniverse2218-19972018-10-0141010410.3390/universe4100104universe4100104SNe Ia Redshift in a Nonadiabatic UniverseRajendra P. Gupta0Macronix Research Corporation, 9 Veery Lane, Ottawa, ON K1J 8X4, CanadaBy relaxing the constraint of adiabatic universe used in most cosmological models, we have shown that the new approach provides a better fit to the supernovae Ia redshift data with a single parameter, the Hubble constant H0, than the standard ΛCDM model with two parameters, H0 and the cosmological constant Λ related density, ΩΛ. The new approach is compliant with the cosmological principle. It yields the H0 = 68.28 (±0.53) km s−1 Mpc−1 with an analytical value of the deceleration parameter q0 = −0.4. The analysis presented is for a matter-only, flat universe. The cosmological constant Λ may thus be considered as a manifestation of a nonadiabatic universe that is treated as an adiabatic universe.http://www.mdpi.com/2218-1997/4/10/104galaxiessupernovaedistances and redshiftscosmic microwave background radiationdistance scalecosmology theorycosmological constantHubble constantgeneral relativity |
| spellingShingle | Rajendra P. Gupta SNe Ia Redshift in a Nonadiabatic Universe Universe galaxies supernovae distances and redshifts cosmic microwave background radiation distance scale cosmology theory cosmological constant Hubble constant general relativity |
| title | SNe Ia Redshift in a Nonadiabatic Universe |
| title_full | SNe Ia Redshift in a Nonadiabatic Universe |
| title_fullStr | SNe Ia Redshift in a Nonadiabatic Universe |
| title_full_unstemmed | SNe Ia Redshift in a Nonadiabatic Universe |
| title_short | SNe Ia Redshift in a Nonadiabatic Universe |
| title_sort | sne ia redshift in a nonadiabatic universe |
| topic | galaxies supernovae distances and redshifts cosmic microwave background radiation distance scale cosmology theory cosmological constant Hubble constant general relativity |
| url | http://www.mdpi.com/2218-1997/4/10/104 |
| work_keys_str_mv | AT rajendrapgupta sneiaredshiftinanonadiabaticuniverse |