Variations of the Cosmic Expansion Field and the Value of the Hubble Constant
| dc.creator | Tammann, G. A. | |
| dc.date | 1998-05-04 | |
| dc.date.accessioned | 2026-07-07T02:26:44Z | |
| dc.date.available | 2026-07-07T02:26:44Z | |
| dc.description | Four Hubble diagrams are combined to test for the linearity of the cosmic expansion field. The expansion rate, H_0, is found to decrease by ~5% out to 18000km/s. Beyond this distance the mean value of H_0 is close to the value at 10000km/s. The absolute value of H_0 is derived in two different ways. The one leads through Cepheids from HST and blue SNe Ia to H_0=57+/-7 (external error) at 30000km/s. The other uses various distance indicators to the Virgo cluster whose distance can be extended to 10000km/s by means of only relative cluster distances; the result of H_0 is closely the same. Independent distances from purely physical methods (SZ effect, gravitational lenses, and MBW fluctuations) cluster about H_0(cosmic)=58. | |
| dc.description | 16 pages, LaTeX (mprocl.sty + psfig.sty), 8 figures. To be published in "General Relativity", 8th Marcel Grossmann Symposium, ed. T. Piran, Singapore: World Sientific | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9805013 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9805013 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/12396 | |
| dc.subject | Astrophysics | |
| dc.title | Variations of the Cosmic Expansion Field and the Value of the Hubble Constant | |
| dc.type | text |