Bibliographic Details
| Title: |
Solar system measurements and the local Hubble tension. |
| Authors: |
King, Leslie A. les@king.myzen.co.uk |
| Source: |
Physics Essays. Mar2026, Vol. 39 Issue 1, p49-52. 4p. |
| Subjects: |
Solar system, Hubble constant, Cosmic background radiation, Expanding universe, Type I supernovae, Astrophysics, Hubble, Edwin Powell, 1889-1953 |
| Abstract (English): |
The existing astrophysical paradigm asserts that cosmological expansion does not operate on gravitationally bound bodies. However, there is now considerable evidence that such expansion does occur within the Solar System. Seven quantitative estimates of "local" expansion phenomena suggest that H0, the mean (±σ) current value of the Hubble-Lemaître parameter, is (49 ± 11) (km/s)/Mpc. That is far lower than has been derived from analysis of the cosmic background radiation, i.e., H0 = (67.4 ± 0.5) (km/s)/Mpc or the luminosity of type Ia supernovae, i.e., (73.04 ± 1.04) (km/s)/Mpc. Furthermore, there are several other situations within the Solar System where precise values are less readily obtained, but there is some suggestion that H0 might also have a lower value. These findings, when considered alongside the large-scale "Hubble tension," may support the suggestion that H0 may be scale-dependent, although the physical origin of that effect is unclear. [ABSTRACT FROM AUTHOR] |
| Abstract (French): |
Le paradigme astrophysique actuel affirme que l'expansion cosmologique n'opère pas sur les corps liés par la gravité. Cependant, il existe désormais de nombreuses preuves que cette expansion se produit également au sein du Système solaire. Sept estimations quantitatives des phénomènes d'expansion 'locale' suggèrent que Ho, la valeur moyenne actuelle (±0) du paramètre de Hubble-Lemaître, est de (49±11) (km/s)/Mpc. Cela est bien inférieur aux valeurs dérivées de l'analyse du rayonnement de fond cosmique, soit Ho(67.4±0.5) (km/s)/Mpc, ou de la lumi-nosité des supernovae de type la, soit (73.04±1.04) (km/s)/Mpc. De plus, il existe plusieurs autres situations au sein du Système solaire, où des valeurs précises sont moins facilement obtenues, mais il semble que Ho pourrait également y être plus faible. Ces résultats, lorsqu'ils sont considérés en parallèle avec la 'tension de Hubble' à grande échelle, peuvent soutenir l'hypothèse selon laquelle Ho pourrait dépendre de l'échelle, bien que l'origine physique de cet effet reste incertaine. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
