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news:fast_radio_enigmas [2016/04/12 10:58] (current)
salome created
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 +Date: Tuesday April 12 2016
 +Time: 16:00-17:00
 +Place: HG00.071
 +
 +
 +"Fast Radio Enigmas” by Jason Hessels (UvA/​ASTRON)
 +
 +ABSTRACT:
 +Almost 10 years ago, Dunc Lorimer and collaborators discovered a
 +single millisecond-duration radio burst with the Parkes telecope. ​ The
 +dispersion measure of this burst was much higher than can be explained
 +by material within our galaxy - thereby suggesting an extragalactic
 +origin. This was the first "Fast Radio Burst",​ or FRB, or "​Furby"​ (but
 +please don't call them that). Since then, a scientific roller-coaster
 +ride has ensued. The discovery of 16 other FRBs has strengthened the
 +case that they must be astronomical in origin, while at the same time
 +artificial signals from observatory microwaves (i.e. the infamous
 +"​Perytons"​) have muddied the waters and generated skepticism.
 +Recently, a series of 3 papers in Nature have provided a lot of new
 +fodder to chew on.  After summarizing some of the highs and lows of
 +the last decade, I will focus on our discovery of a repeating FRB seen
 +with the Arecibo telescope. ​ This cleanly points to a non-cataclysmic
 +origin like a rapidly spinning and highly magnetized neutron star -
 +possibly one hosted by another galaxy. ​ Lastly, I'll give the status
 +of pulsar and fast transient searches with LOFAR as well as the
 +prospects for future facilities, including the Square Kilometre Array.