We update globular cluster age estimates and discuss their implications in the context of present knowledge in cosmology. On the basis of the best information now available, the ages of the oldest globular clusters are estimated at 13.0±1.5 Gyr. If this result, whose main uncertainty is primarily in the distance scale, continues to hold, the long standing discrepancy between the stellar evolution timescale and the universal expansion timescale will have been resolved
A variation of Newton's constant G over cosmological time scales would modify the main-squence time ...
The ACS Survey of Galactic globular clusters is a Hubble Space Telescope Treasury program designed t...
We present homogeneous age determinations for a large sample of 55 Galactic globular clusters, whi...
We update globular cluster age estimates and discuss their implications in the context of present kn...
We update globular cluster age estimates and discuss their implications in the context of present kn...
We update globular cluster age estimates and discuss their implications in the context of present kn...
Estimating the age of the Universe is an old problem. Rapid progress in observational cosmology in r...
The age of three of the oldest clusters - M15, M68, M92 - has been redetermined. We use the latest E...
We present accurate relative ages for a sample of 55 Galactic globular clusters. The ages have been ...
The Galactic globular clusters are believed to be among the most ancient objects for which reliable ...
International audienceThe dominant systematic uncertainty in the age determination of galactic globu...
We have applied a new method to analyze the horizontal branch (HB) morphology in relation to the dis...
Ages have been derived for 55 globular clusters (GCs) for which Hubble Space Telescope Advanced Came...
The ACS Survey of Galactic Globular Clusters is a Hubble Space Telescope (HST) Treasury program desi...
Using updated stellar models and isochrones we determine the age of 25 galactic halo clusters. The c...
A variation of Newton's constant G over cosmological time scales would modify the main-squence time ...
The ACS Survey of Galactic globular clusters is a Hubble Space Telescope Treasury program designed t...
We present homogeneous age determinations for a large sample of 55 Galactic globular clusters, whi...
We update globular cluster age estimates and discuss their implications in the context of present kn...
We update globular cluster age estimates and discuss their implications in the context of present kn...
We update globular cluster age estimates and discuss their implications in the context of present kn...
Estimating the age of the Universe is an old problem. Rapid progress in observational cosmology in r...
The age of three of the oldest clusters - M15, M68, M92 - has been redetermined. We use the latest E...
We present accurate relative ages for a sample of 55 Galactic globular clusters. The ages have been ...
The Galactic globular clusters are believed to be among the most ancient objects for which reliable ...
International audienceThe dominant systematic uncertainty in the age determination of galactic globu...
We have applied a new method to analyze the horizontal branch (HB) morphology in relation to the dis...
Ages have been derived for 55 globular clusters (GCs) for which Hubble Space Telescope Advanced Came...
The ACS Survey of Galactic Globular Clusters is a Hubble Space Telescope (HST) Treasury program desi...
Using updated stellar models and isochrones we determine the age of 25 galactic halo clusters. The c...
A variation of Newton's constant G over cosmological time scales would modify the main-squence time ...
The ACS Survey of Galactic globular clusters is a Hubble Space Telescope Treasury program designed t...
We present homogeneous age determinations for a large sample of 55 Galactic globular clusters, whi...