演講資訊

摘要：

Pulsars make for some of the best laboratories for some of the most interesting areas of physics. From tests of General Relativity, to restrictions on the physics of the densest matter outside a black hole, to probes of gravitational wave background. They can also provide detailed information about the intervening Interstellar Medium (ISM) through pulsar scintillometry. As the signal propagates through the ISM, density variations cause it to deflect which can result in the formation of multiple images of the pulsar on the sky. The interference of these images cause the observed pulsed intensity of the pulsar to vary in frequency and time, known as the dynamic spectrum, as the Earth moves through the interference pattern. These variations encode information about the transverse motion of the pulsar and ISM, as well as the nature of the lensing structures. In this talk, I will discuss how this information can be used to assist research into three of the biggest questions for pulsar astronomy, as well as how the discovery of "Scintillation Arcs" in the Fourier transform of the dynamic spectrum has transformed the field.