Sentences with phrase «weak lensing maps»

Deeper redshift surveys combined with similar weak lensing maps should reveal an even greater contribution of star - forming galaxies as tracers of the matter distribution in this higher redshift range.

In other words, the matter distribution traced by the foreground galaxies and the distribution traced by the Subaru weak lensing map are similar.

The MMT redshift survey provides the map for the way all types of galaxies might contribute to the weak lensing map.

Figure 1 shows a close - up view of a cluster of galaxies with the weak lensing map tracing the matter distribution.

The research team provides a new window on galaxy evolution by comparing the three - dimensional galaxy distribution mapped with a redshift survey including star - forming galaxies to a weak lensing map based on Subaru imaging.

Remarkably, the distribution of star - forming galaxies around a cluster of galaxies in the more distant universe (5 billion years ago) corresponds much more closely with the weak lensing map than a slice of the more nearby universe (3 billion years ago).

Not exact matches

Weak lensing is a phenomenon that provides a powerful technique for mapping the changing contribution of star - forming galaxies as tracers of the cosmic web.

Using this «weak lensing» effect to map dark matter is «a first important step to understand the dark Universe,» says Van Waerbeke's co-worker Catherine Heymans of the University of Edinburgh in the United Kingdom.

These maps are the first demonstration of this effect in the weak lensing signal.

The Hiroshima group combined these two tracers: galaxies and their weak lensing signal to map the changing role of massive star - forming galaxies as the universe evolves.

They are the locations of bright stars and other nearby objects that get in the way of the observations of more distant galaxies and are hence masked out in these maps as no weak - lensing signal can be measured in these areas.

By measuring the CMB polarization data provided by POLARBEAR, a collaboration of astronomers working on a telescope in the high - altitude desert of northern Chile designed specifically to detect «B - mode» polarization, the UC San Diego astrophysicists discovered weak gravitational lensing in their data that, they conclude, permit astronomers to make detailed maps of the structure of the universe, constrain estimates of neutrino mass and provide a firm test for general relativity.