Astronomers at the Gemini telescope in Hawaii have obtained a complete, multi-dimensional picture, of the dynamic flow of gas and stars at the core of an active galaxy [NGC 1068] located 70 million light years away. The image was achieved in a single snapshot and is the first time such a picture has been obtained by one of the new generation of giant telescopes with an 8 - 10 metre light collecting mirror. The astronomers used a new instrument - the Integral Field Unit (IFU), designed and built at Durham University - fitted to the telescope`s multi-object spectrograph to image the violent galaxy. The resulting data has been transformed into an animation that dramatically reveals the internal dynamics of the galaxy - including the interactions of a pair of galactic-scale jets that spew material for thousands of light years away from a suspected black hole at the galaxy`s core.
"We are very excited by these results and the superb capabilities that the IFU has added to the Gemini Multi-Object Spectrograph (GMOS)", commented Dr. Jeremy Allington-Smith, from Durham University, who was responsible for the overall design and construction of the GMOS Integral Field Unit. " In effect we have added an extra dimension to the main instrument so that it can physically map the motion of gas and stars at any point in the image of the object under study. So far we have used it to map the motion of gas within the nucleus of a powerful active galaxy, NGC1068, and the orbits of stars within more normal galaxies, but it can also be used to study regions within our own galaxy where stars are being formed."
The IFU instrument uses hundreds of tiny optical fibres, each thinner than a human hair, with tiny micro-lenses attached to the end to guide light from the telescope`s two dimensional image to a spectrograph. The spectrograph produces one individual spectrum for each fibre, a total of 1500 individual spectra, that can each reveal details of the physical conditions and velocity of the gas, dust and stars that it observes. This technology is new to the world of 8 -10 metre class telescopes and is particularly powerful when combined with an advanced telescope like Gemini which has 10 times the light collecting power of the Hubble Space Telescope and uses sophisticated optical technologies to focus starlight to razor sharpness.
Gill Ormrod | alphagalileo
Quantum optics allows us to abandon expensive lasers in spectroscopy
22.11.2017 | Lomonosov Moscow State University
Nano-watch has steady hands
22.11.2017 | University of Vienna
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
22.11.2017 | Business and Finance
22.11.2017 | Physics and Astronomy
22.11.2017 | Physics and Astronomy