ICTS:30645

Video URL

Cosmology with pulsar timing arrays.

Cosmology with pulsar timing arrays.

(2024). Cosmology with pulsar timing arrays.. SciVideos. https://youtube.com/live/CSaYTSg4zGU

Cosmology with pulsar timing arrays.. SciVideos, Dec. 31, 2024, https://youtube.com/live/CSaYTSg4zGU 

          @misc{ scivideos_ICTS:30645,
            doi = {},
            url = {https://youtube.com/live/CSaYTSg4zGU},
            author = {},
            keywords = {},
            language = {en},
            title = {Cosmology with pulsar timing arrays.},
            publisher = {},
            year = {2024},
            month = {dec},
            note = {ICTS:30645 see, \url{https://scivideos.org/index.php/icts-tifr/30645}}
          }
Golam Mohiuddin Shaifullah
Talk numberICTS:30645
Source RepositoryICTS-TIFR
Collection

Abstract

Pulsar timing arrays are on the cusp of making a detection of the stochastic gravitational wave background at nanohertz frequencies, with strong evidence presented in the datasets of five PTAs. While an astrophysical supermassive black-hole binaries driven background has been the most favoured source, current amplitudes appear to be in tension with classical models using quasi-circularised SMBHBs. This raises the intriguing possibility that the current background is at least partially driven by cosmological or "new physics" sources. I will present the current state of PTA experiments and the constraints on cosmological backgrounds, as well as future prospects.