AstroTours - Using Interstellar Plasma Lenses As Billion Kilometre Telescopes (July 2017) скачать в хорошем качестве

AstroTours - Using Interstellar Plasma Lenses As Billion Kilometre Telescopes (July 2017)

Fifty years ago, two radio telescopes across Canada were combined to achieve the resolution of a telescope 3000 km across, a technique now known as VLBI. Interstellar plasma lenses bend light from sources like pulsars, creating multiple images of the same source on the sky. When we combine these images in the same way as radio telescope on Earth, we can measure the position and motion of their source. Since instead of being telescopes separated by 3000km these images are separated by billions of km, this results in remarkably high precision. In my talk, I will describe the first successful VLBI experiment, and the principles behind how it works. I will then talk about my current research, using VLBI to map the scattered images of pulsars, and using these scattered images to study physical properties of pulsars which were previously unmeasurable. About the Speaker: Robert Main is a PhD candidate in Astronomy & Astrophysics at the University of Toronto. For his research, he analyses radio data of pulsars, attempting to use the scattering of pulsar light to map out their emission to unparalleled precision. He spends his free time writing a rock musical with his brother, watching kung-fu movies, befriending cats (and certain dogs), and jumping off of various things. He hopes someday to follow in the footsteps of his idol, Commander William Riker of the Starship Enterprise.