The Unsettled Number: Hubble’s Tension
One of main sources of uncertainty in modern cosmology is the present rate of the universe’s expansion, H<sub>0</sub>, called the Hubble constant. Once again, different observational techniques bring about different results, causing new “Hubble tension”. In the present work, we review th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/9/12/501 |
| _version_ | 1797379216031875072 |
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| author | Jorge L. Cervantes-Cota Salvador Galindo-Uribarri George F. Smoot |
| author_facet | Jorge L. Cervantes-Cota Salvador Galindo-Uribarri George F. Smoot |
| author_sort | Jorge L. Cervantes-Cota |
| collection | DOAJ |
| description | One of main sources of uncertainty in modern cosmology is the present rate of the universe’s expansion, H<sub>0</sub>, called the Hubble constant. Once again, different observational techniques bring about different results, causing new “Hubble tension”. In the present work, we review the historical roots of the Hubble constant from the beginning of the twentieth century, when modern cosmology originated, to the present. We develop the arguments that gave rise to the importance of measuring the expansion of the Universe and its discovery, and we describe the different pioneering works attempting to measure it. There has been a long dispute on this matter, even in the present epoch, which is marked by high-tech instrumentation and, therefore, in smaller uncertainties in the relevant parameters. It is, again, currently necessary to conduct a careful and critical revision of the different methods before one invokes new physics to solve the so-called Hubble tension. |
| first_indexed | 2024-03-08T20:18:56Z |
| format | Article |
| id | doaj.art-3d3cfa0a02db49ac9d4ccfbf7d4a55dd |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-08T20:18:56Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-3d3cfa0a02db49ac9d4ccfbf7d4a55dd2023-12-22T14:46:34ZengMDPI AGUniverse2218-19972023-11-0191250110.3390/universe9120501The Unsettled Number: Hubble’s TensionJorge L. Cervantes-Cota0Salvador Galindo-Uribarri1George F. Smoot2Department of Physics, National Institute for Nuclear Research, Km 36.5 Carretera Mexico-Toluca, Ocoyoacac C.P. 52750, Mexico State, MexicoDepartment of Physics, National Institute for Nuclear Research, Km 36.5 Carretera Mexico-Toluca, Ocoyoacac C.P. 52750, Mexico State, MexicoDonostia International Physics Center (DIPC), Basque Country, E-48080 San Sebastian, SpainOne of main sources of uncertainty in modern cosmology is the present rate of the universe’s expansion, H<sub>0</sub>, called the Hubble constant. Once again, different observational techniques bring about different results, causing new “Hubble tension”. In the present work, we review the historical roots of the Hubble constant from the beginning of the twentieth century, when modern cosmology originated, to the present. We develop the arguments that gave rise to the importance of measuring the expansion of the Universe and its discovery, and we describe the different pioneering works attempting to measure it. There has been a long dispute on this matter, even in the present epoch, which is marked by high-tech instrumentation and, therefore, in smaller uncertainties in the relevant parameters. It is, again, currently necessary to conduct a careful and critical revision of the different methods before one invokes new physics to solve the so-called Hubble tension.https://www.mdpi.com/2218-1997/9/12/501Hubble constantHubble tensionobservational cosmologyhistory of physics |
| spellingShingle | Jorge L. Cervantes-Cota Salvador Galindo-Uribarri George F. Smoot The Unsettled Number: Hubble’s Tension Universe Hubble constant Hubble tension observational cosmology history of physics |
| title | The Unsettled Number: Hubble’s Tension |
| title_full | The Unsettled Number: Hubble’s Tension |
| title_fullStr | The Unsettled Number: Hubble’s Tension |
| title_full_unstemmed | The Unsettled Number: Hubble’s Tension |
| title_short | The Unsettled Number: Hubble’s Tension |
| title_sort | unsettled number hubble s tension |
| topic | Hubble constant Hubble tension observational cosmology history of physics |
| url | https://www.mdpi.com/2218-1997/9/12/501 |
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