Peryton (astronomy)
In radio astronomy, perytons are short radio signals with a length of a few milliseconds that are probably exclusively of terrestrial origin. The perytons are named after mythical creatures .
Terrestrial interference is always a problem in radio astronomy . Probably, these signals are sidelobes captured the antenna. The perytons occur at great heights above the horizon and show no frequency dispersion in contrast to the closely related Fast Radio Bursts . Perytons often appear as a series of periodic bursts. A recombination of three charge carriers or the synchrotron radiation of a decaying magnetic field were discussed as mechanisms of origin .
Potential sources of perytons are:
- Signals from aircraft
- Lightning bolts in the ionosphere
- Solar flares
- Terrestrial gamma-ray bursts
- Narrow bipolar pulse. These are electrical discharges between clouds at great heights with an output of a few hundred gigawatts
The only proven source of perytons to date are commercial microwave ovens . When opening a device that is in operation, the safety shutdown only triggers after a few milliseconds. The microwave radiation emitted during this time is possibly picked up as a signal by the sensitive antennas, as researchers at the Australian Parkes Observatory were able to demonstrate. It is unclear, however, whether this is the only cause of perytons.
literature
- Mohammad Danish Khan: Perytons and their Possible Sources . In: Astrophysics. Solar and Stellar Astrophysics . 2014, arxiv : 1404.5080v1 .
- JI Katz: What Perytons Aren't, and Might Be . In: Astrophysics. Solar and Stellar Astrophysics . 2014, arxiv : 1403.0637v1 .
- SR Kulkarni, EO Ofek, JD Neill, Z. Zheng, M. Juric: Giant Sparks at Cosmological Distances? In: Astrophysics. Solar and Stellar Astrophysics . 2014, arxiv : 1402.4766v1 .
- Pascal Saint-Hilaire, Arnold O. Benz, Christian Monstein: Short-duration Radio Bursts with Apparent Extragalactic Dispersion . In: Astrophysics. Solar and Stellar Astrophysics . 2014, arxiv : 1402.0664v1 .
- Manjari Bagchi, Angela Cortes Nieves, Maura McLaughlin: A search for dispersed radio bursts in archival Parkes Multibeam Pulsar Survey data . In: Astrophysics. Solar and Stellar Astrophysics . 2012, arxiv : 1207.2992v2 .
Individual evidence
- ^ Petroff et al .: Identifying the source of perytons at the Parkes radio telescope . 2015, arxiv : 1504.02165v1 [astro-ph.IM] .
- ↑ Dirk Lorenzen: Microwaves from the depths of the kitchen. In: Deutschlandfunk. Retrieved July 12, 2019 .
- ^ Bob Yirka: Mystery of Peryton Reception at Australian Observatory solved: It's from microwave ovens. In: Phys.org. April 13, 2015, accessed on July 12, 2019 .