A Drop in the Light Bucket: How Do We Measure a Galaxy?
Amanda Pagul, Space Telescope Science Institute
Tracing back to the Hubble Deep Field in the 1990s, galaxy surveys with space telescopes have become a fundamental part of cosmological studies. Newer surveys have grown both larger and deeper to probe more galaxies at greater distance and detail. One such survey, Hubble’s Frontier Fields program, leverages gravitational lensing to push Hubble beyond even its impressive technical limits.
To extract understanding of how galaxies change across space and time, a crucial process is to convert these images into catalogs of galaxies with measured properties. Given the various observed wavelengths, cosmological redshift, galaxy development over billions of years, and numerous other factors, defining a reliable set of galaxy characteristics is a significant challenge. Dr. Pagul will describe previous survey results with galaxy cluster data from the Hubble Space Telescope and future work with the James Webb Space Telescope.
4:30 - News from the Universe
14:54 - Featured Speaker
1:07:54 - Live Q&A
Host: Frank Summers, , Space Telescope Science Institute
Recorded live on Tuesday, May 2, 2023
More information: www.stsci.edu/public-lectures
#STScI #galaxies #astronomy #space #telescopes #Hubble #NASAWebb #survey #galaxies #HubbleDeepField
