Hubble's largest ever infrared image dates back 10 billion years. The largest near-infrared image of galaxies ever captured by the Hubble Space Telescope, possible James Webb TelescopeIt provided a playground for target-seeking scientists. Already the division of labor between the Hubble Space Telescope and the James Webb Telescope, astronomers and astrophysicists aroused.
The image was acquired by the Hubble Space Telescope's Wide Field Camera 3 (WFC3) with additional archival data from Hubble's Advanced Surveys Camera as part of a project called 3D-DASH. It spans the 1.35-degree sky, roughly six full moons, and is home to thousands of galaxies. The purpose of this observation is to identify galaxies that will be further studied by the James Webb Space Telescope and other telescopes in the future.
"I was fascinated by large galaxies with the greatest mass in the universe, formed by the merging of other galaxies," said Lamiya Mowla, an astronomer at the University of Toronto's Dunlap Institute for Astronomy and Astrophysics and lead author of the study.
“What caused the changes in their form and how did their structure grow? It was impossible to investigate these unusual examples using existing photographs, so this massive review was created.”
Normally, it would take 2.000 hours of Hubble observations to produce such an enormous image, but Mowla's team worked with Drift and Shift (DASH), which took multiple images and stitched them together, resulting in single images eight times larger than WFC3's ordinary field. used a new technique called (0,04 x 0,04 degrees).
Also, using the DASH technique, Hubble is able to collect eight photos instead of one each time it orbits the Earth.
The entire image was completed in just 1.256 hours of observation using a total of 3 unique WFC250 images.
Most of the galaxies in the photo can be seen as infrared blobs. The light of the bright star-forming regions within them has been redshifted by the expansion of the universe into near-infrared wavelengths.
The farthest ones were allowed to be seen as they were about 10 billion years ago. You can see these galaxies in more detail in the online interactive version of the image in the 3D-Dash image navigator.
Unlike Hubble, Webb will be able to study these galaxies in greater detail thanks to the improved light-gathering power of the newer telescope's 6,5-metre (21,3-foot) mirror. The release of the 12D-DASH data came just in time, as Webb's first science-quality photos were scheduled to be released on July 3.
Astronomers predict the Euclidean mission of the European Space Agency and NASA's Nancy Grace Roman Space Telescope, which will have larger fields of view (0,79 x 1,16 degrees and 0,8 x 0,4 degrees, respectively) than Hubble and Webb. They will have to wait until 2023 and 2027.