The Discovery of a Middle-Aged Galaxy From When the Universe Was Young
Hubble observations of a gravitationally lensed high redshift galaxy harboring an old stellar population.
Dark matter with microlensing
Some strong gravitational lenses exhibit what are known as “anomalous flux ratios”: the multiple images don’t have the same flux. One possible explanation for this is microlensing, which results from the gravitational influence of stars and perhaps dark matter.
Details at a distance
In this paper, the authors seek to explore the properties of star-forming galaxies by looking at a lensed galaxy. This galaxy has been distorted into a giant arc by the gravitational potential of a foreground galaxy cluster.
The Emission Line Properties of Gravitationally-lensed 1.5 < z < 5 Galaxies
Studying galaxies at high redshift helps us to understand how galaxies formed and evolved; in particular, astronomers are interested in the rates of star formation in galaxies and how these rates change with time.