Session G06: Physical Review Invited Session: Aspects of Multimessenger Astrophysics

Live

As the breadth and depth of gravitational wave detection capabilities grows, so do the opportunities for multimessenger observations. This talk will survey the near- and medium-term future for ground- and space-based gravitational wave observatories, the astrophysical sources with the potential to also be observed electromagnetically, and the promise of how joint observations will answer long-standing questions in astrophysics, cosmology, and fundamental physics.   

Live

As demonstrated by the historic discovery and follow-up campaigns of the first neutron star merger, GW170817, future multi-messenger observations coupling gravitational waves and light hold the promise of precise localizations, thus enabling the determination of precise redshifts, the nature of their outflows, and properties of the environment on sub-parsec to kiloparsec scales. Here, I will discuss lessons learned from follow-up campaigns in O3 and prospects for the detection of future such multi-messenger detections, matched to current and planned electromagnetic facilities, as well as potential future capabilities.   

Live

Neutrino astrophysics became a reality in 2013 when IceCube discovered an all-sky celestial radiation of neutrinos in the TeV-PeV energy range. While this flux has been observed with higher significances with more years of data, what emits these neutrinos remains unknown. In 2017, a multi-messenger observation of the gamma-ray blazar TXS 0506$+$056 became the first compelling evidence of TeV neutrino emission from a celestial object. More such observations and further discoveries of neutrino point sources are needed to explain the all-sky diffuse flux. Multi-messenger astronomy will be key in these efforts, as will future neutrino detectors, with construction already under way.