As big fish eat little fish in the Earths vast oceans, so too do supermassive black holes gorge on smaller black holes and neutron stars, making themselves more massive in the process. Using sophisticated computer modeling, Penn State scientists have calculated the rate of this black-hole snacking, called "extreme-mass-ratio inspirals." They expect to see several events per year with the Laser Interferometer Space Antennae (LISA), a joint NASA - European Space Agency mission now in development.
Steinn Sigurdsson, associate professor of astronomy and astrophysics at Penn State, discusses the inspiral rate today during a presentation at the American Astronomical Society meeting in San Diego. These events will be a major source of gravitational waves, which are ripples in spacetime. Sigurdsson said that this type of black hole inspiral provides one of the cleanest tests for assessing Einsteins theory of general relativity.
"Most galaxies contain a supermassive black hole, and from time to time a smaller black hole or neutron star will fall in," said Sigurdsson. "Very little light, if any, is emitted. This is done in the dark. Our best chance of studying the process is through gravitational radiation."
Barbara K. Kennedy | EurekAlert!
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In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
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