Peering back in time more than 7 billion years, a team of astronomers using a powerful new spectrograph at the W. M. Keck Observatory in Hawaii has obtained the first maps showing the distribution of galaxies in the early universe. The maps show the clustering of galaxies into a variety of large-scale structures, including long filaments, empty voids, and dense groups and clusters.
These maps are among the first results from the DEEP2 Redshift Survey, an ongoing three-year project designed to study galaxies in the distant universe over a volume comparable to recent surveys of the local universe. Using the new DEIMOS (Deep Extragalactic Imaging Multi-Object Spectrograph) instrument at the 10-meter Keck II Telescope, this project is measuring the properties of distant galaxies as well as mapping out their distribution in space. DEIMOS, which was built precisely for this survey, allows simultaneous, detailed observations of up to 150 galaxies at a time. By studying galaxies whose light has taken billions of years to reach the Earth, the astronomers are effectively looking far back in time.
"For the first time, we are getting a map of the universe as it was 7 billion years ago, when it was roughly half the age it is now. Comparing these observations with local surveys will yield direct clues to some of the most profound mysteries of the universe, such as the nature of dark matter, the nature of dark energy, and the origins of galaxies and quasars," said David Koo, professor of astronomy and astrophysics at the University of California, Santa Cruz.
Tim Stephens | EurekAlert!
Tiny lasers from a gallery of whispers
20.09.2017 | American Institute of Physics
New quantum phenomena in graphene superlattices
19.09.2017 | Graphene Flagship
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...
Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...
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