PIRSA:23010117

Observing sub-nanohertz gravitational waves with pulsar parameter drift

DeRocco, W. (2023). Observing sub-nanohertz gravitational waves with pulsar parameter drift. Perimeter Institute. https://pirsa.org/23010117

DeRocco, William. Observing sub-nanohertz gravitational waves with pulsar parameter drift. Perimeter Institute, Jan. 31, 2023, https://pirsa.org/23010117 

          @misc{ pirsa_PIRSA:23010117,
            doi = {10.48660/23010117},
            url = {https://pirsa.org/23010117},
            author = {DeRocco, William},
            keywords = {Particle Physics},
            language = {en},
            title = {Observing sub-nanohertz gravitational waves with pulsar parameter drift},
            publisher = {Perimeter Institute},
            year = {2023},
            month = {jan},
            note = {PIRSA:23010117 see, \url{https://pirsa.org}}
          }

William DeRocco

University of California, Santa Cruz

Talk number
PIRSA:23010117
Collection
Talk Type
Subject
Abstract

Gravitational waves with frequencies below 1 nHz are notoriously difficult to detect. With periods exceeding current experimental lifetimes, they induce slow drifts in observables rather than periodic correlations. Observables with well-known intrinsic contributions provide a means to probe this regime. In this talk, I will demonstrate the viability of using observed pulsar timing parameters to discover such ultralow frequency gravitational waves, presenting two complementary observables for which the systematic shift induced by ultralow-frequency gravitational waves can be extracted. I will then show the results of searches for both continuous and stochastic signals from supermassive black hole binaries using existing data for these observables, and demonstrate that this technique has the power to probe astrophysically-interesting strains.

Zoom Link:  https://pitp.zoom.us/j/95734210379?pwd=Wnp1cHR2QW93bksxaGlCWEZVSjRsUT09