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Measuring the Variance of the Macquart Relation in z-DM Modeling
Jay Baptista, J. Xavier Prochaska, Alexandra G. Mannings +7
The Macquart relation describes the correlation between the dispersion measure (DM) of fast radio bursts (FRBs) and the redshift of their host galaxies. The scatter of the Macq…
Constraining ultralight vector dark matter with the Parkes Pulsar Timing Array second data release
Yu-Mei Wu, Zu-Cheng Chen, Qing-Guo Huang +7
Composed of ultralight bosons, fuzzy dark matter provides an intriguing solution to challenges that the standard cold dark matter model encounters on sub-galactic scales. The ultra…
A measurement of Hubble's Constant using Fast Radio Bursts
C. W. James, E. M. Ghosh, J. X. Prochaska +12
We constrain the Hubble constant H using Fast Radio Burst (FRB) observations from the Australian Square Kilometre Array Pathfinder (ASKAP) and Murriyang (Parkes) radio telescop…
Constraining cosmological phase transitions with the Parkes Pulsar Timing Array
Xiao Xue, Ligong Bian, Jing Shu +15
A cosmological first-order phase transition is expected to produce a stochastic gravitational wave background. If the phase transition temperature is on the MeV scale, the power sp…
Estimating the contribution of foreground halos to the FRB 180924 dispersion measure
Sunil Simha, Nicolas Tejos, J. Xavier Prochaska +6
Fast Radio Burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution of the matter distribut…
A census of baryons in the Universe from localized fast radio bursts
J. -P. Macquart, J. X. Prochaska, M. McQuinn +13
More than three quarters of the baryonic content of the Universe resides in a highly diffuse state that is difficult to observe, with only a small fraction directly observed in gal…
Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter
Nataliya K. Porayko, Xingjiang Zhu, Yuri Levin +27
It is widely accepted that dark matter contributes about a quarter of the critical mass-energy density in our Universe. The nature of dark matter is currently unknown, with the mas…
Gravitational waves from binary supermassive black holes missing in pulsar observations
R. M. Shannon, V. Ravi, L. T. Lentati +19
Gravitational waves are expected to be radiated by supermassive black hole binaries formed during galaxy mergers. A stochastic superposition of gravitational waves from all such bi…