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06-07-2022
Colloquium: The complex process to protect radio astronomy from harmful interferences
| Submitter: | Gyula Jozsa |
| Description: | Colloquium - The complex process to protect radio astronomy from harmful interferences In spectrum management, we participate in the regulatory processes that can be used to protect radio astronomy from harmful interference though other radio services. One aspect of this is the simulation of the strength of the signal entering radio astronomical observations and, with that, the connected data loss to radio astronomy. The image shows the average received power flux density per grid cell on the sky, as simulated for a hypothetical (!) megaconstellation of 484 satellites, and the expected time loss per grid cell. For statistical reasons he simulations have to be repeated many times, making such calculations computationally demanding. WLT - MeerKAT observations of extragalactic and anomalous gas The largest dark neutral gas complex so far has been revealed with the MeerKAT telescope. An international team of researchers used the telescope to observe a cosmic filament of galaxies and found this unusual object close to the centre of the filament, where it is densest. With a mass of 10 billion solar masses and no significant amount of associated stars (hence it is "dark") it is the most massive dark neutral hydrogen loud complex found so far. Its origin has yet to be determined. The original press release with some more information can be found on the SARAO pages |
| Copyright: | Gyula Jozsa |
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