Draft:MeerKAT Pulsar Timing Array
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The MeerKAT Pulsar Timing Array (MPTA) is an international collaboration using the MeerKAT radio telescope to carry out high-precision timing of millisecond pulsars.[1], primarily ones in the southern hemisphere. The main goal of the experiment is to detect nanohertz gravitational waves. It is one of several pulsar timing array projects in operation collaborating globally under the aegis of the International Pulsar Timing Array.
Data releases
[edit]MPTA started observations in 2019 and released two datasets to date: the 2.5-year dataset consisting of observations of 78 pulsars[2], and the 4.5-year dataset consisting of observations of 83 pulsars[3]. The analysis of the 4.5-year dataset found evidence for a stochastic gravitational wave background[4] consistent with recent findings of other pulsar timing arrays[5]
References
[edit]- ^ "MPTA". mpta-gw.github.io. Retrieved 2025-07-13.
- ^ Miles, Matthew T.; Shannon, Ryan M.; Bailes, Matthew; Reardon, Daniel J.; Keith, Michael J.; Cameron, Andrew D.; Parthasarathy, Aditya; Shamohammadi, Mohsen; Spiewak, Renee (2022-12-09), The MeerKAT Pulsar Timing Array: First Data Release, arXiv, doi:10.48550/arXiv.2212.04648, arXiv:2212.04648, retrieved 2025-07-13
- ^ Miles, Matthew T.; Shannon, Ryan M.; Reardon, Daniel J.; Bailes, Matthew; Champion, David J.; Geyer, Marisa; Gitika, Pratyasha; Grunthal, Kathrin; Keith, Michael J. (2024-12-02), The MeerKAT Pulsar Timing Array: The $4.5$-year data release and the noise and stochastic signals of the millisecond pulsar population, arXiv, doi:10.48550/arXiv.2412.01148, arXiv:2412.01148, retrieved 2025-07-13
- ^ Miles, Matthew T.; Shannon, Ryan M.; Reardon, Daniel J.; Bailes, Matthew; Champion, David J.; Geyer, Marisa; Gitika, Pratyasha; Grunthal, Kathrin; Keith, Michael J. (2024-12-02), The MeerKAT Pulsar Timing Array: The first search for gravitational waves with the MeerKAT radio telescope, arXiv, doi:10.48550/arXiv.2412.01153, arXiv:2412.01153, retrieved 2025-07-13
- ^ Miles, Matthew; Nathan, Rowina (2024-12-03). "To map the vibration of the universe, astronomers built a detector the size of the galaxy". The Conversation. Retrieved 2025-07-13.