An original constraint on the Hubble constant: h>0.74
arXiv:0804.3699 · doi:10.1111/j.1365-2966.2008.13607.x
Abstract
The Hubble parameter H0 still not very well measured. Although the Hubble Key Project, Chandra and WMAP gave good estimates, the uncertainties remain quite large. In this brief report, we suggest an original and independent method to derive a lower limit on H0 using the absorption of very high energy gamma-rays by the cosmic infrared background. With conservative hypothesis, we obtain H0>74 km/s/Mpc at the 68% confidence level, which favors the upper end of the intervals allowed by dedicated experiments.
7 pages, 3 figures. Version accepted by MNRAS, minor changes, results unchanged
References in corpus (8)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Gravitational Lens Time Delays: A Statistical Assessment of Lens Model Dependences and Implications for the Global Hubble Constant
- Blazar Gamma-Rays, Shock Acceleration, and the Extragalactic Background Light
- A synchrotron self-Compton scenario for the very high energy gamma-ray emission of the radiogalaxy M87
- The WEBT Campaign on the Blazar 3C279 in 2006
- Observations of Selected AGN with H.E.S.S
- On the July 2007 flare of the blazar 3C 454.3
- Galaxy Evolution through Infrared Surveys: from Spitzer to Herschel