A team of astronomers is announcing today that they have discovered a giant Milky Way-sized tunnel filled with high energy particles in a distant galaxy cluster. These new findings are of special interest to astronomers as they may provide the missing evolutionary link necessary to understand the cycle of birth and death, as well as the environmental impact, of radio jets which result from ravenous supermassive black holes within giant galaxies. The report is being presented to the American Astronomical Society meeting in Washington, DC, by Dr. Tracy Clarke of Interferometrics, Inc. in Herndon, VA, and the Naval Research Laboratory (NRL) in Washington, DC; along with collaborators Dr. Craig Sarazin of the University of Virginia in Charlottesville, VA; Dr. Elizabeth Blanton of Boston University in Boston, MA; Dr. Namir Kassim, also of NRL; and Dr. Doris Neumann of CEA in Saclay, France.
Using the Chandra X-ray Observatory to study the multi-million degree gas in the galaxy cluster Abell 2597, the scientists discovered an unusual X-ray tunnel large enough to fit the entire Milky Way galaxy inside. The cluster, located at a distance of roughly one billion light years, contains a tunnel in the hot gas, which measures nearly 110 thousand light years by 36 thousand light years in size. The tunnel, which appears to originate near the core of the central giant galaxy in the cluster, may be more than 200 million years old.
A constant battle is being waged in the central regions of clusters of galaxies. The hot gas invades the core of the cluster and feeds the supermassive black hole that is lurking there. As the black hole eats more and more, it becomes active and nearby material is funneled into powerful jets of highly energetic particles (so-called radio jets) outward into the hot gas. These relativistic jets, containing particles moving at close to the speed of light, carve out bubbles while they expand, pushing aside the hot gas. Like a poorly planned invasion, these jets cut off the fuel supply to the central black hole, leading to a temporary starvation. Without fuel to maintain the attack, the radio jets cease and the hot gas once again is able to invade the central region of the cluster and the battle begins again.
NRL Public Affairs | EurekAlert!
NASA's SDO sees partial eclipse in space
29.05.2017 | NASA/Goddard Space Flight Center
Strathclyde-led research develops world's highest gain high-power laser amplifier
29.05.2017 | University of Strathclyde
The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.
The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
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