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Explaining the statistical properties of Fast Radio Bursts with suppressed low-frequency emission
Vikram Ravi, Abraham Loeb
The possibility of Fast Radio Burst (FRB) emission being suppressed at low frequencies, resulting in a cutoff of the average rest-frame spectrum, has been raised as an explanation…
A fast radio burst with a low dispersion measure
E. Petroff, L. C. Oostrum, B. W. Stappers +23
Fast radio bursts (FRBs) are millisecond pulses of radio emission of seemingly extragalactic origin. More than 50 FRBs have now been detected, with only one seen to repeat. Here we…
AT2018cow: a luminous millimeter transient
Anna Y. Q. Ho, E. Sterl Phinney, Vikram Ravi +14
We present detailed submillimeter- through centimeter-wave observations of the extraordinary extragalactic transient AT2018cow. The apparent characteristics -- the high radio lumin…
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…
Detection of a glitch in the pulsar J1709-4429
Marcus E. Lower, Chris Flynn, Matthew Bailes +24
We report the detection of a glitch event in the pulsar J17094429 (also known as B170644) during regular monitoring observations with the Molonglo Observatory Synthesis Teles…
Flares from coalescing black holes in the centimeter-wavelength transient sky
Vikram Ravi
Radio observations have resulted in some of the most fundamental and exciting discoveries in time-domain astronomy. Here I demonstrate the potential for the Next Generation Very La…
FRB microstructure revealed by the real-time detection of FRB170827
W. Farah, C. Flynn, M. Bailes +24
We report a new Fast Radio Burst (FRB) discovered in real-time as part of the UTMOST project at the Molonglo Observatory Synthesis Radio Telescope (MOST). FRB170827 is the first de…
Measuring the circum- and inter-galactic baryon contents with fast radio bursts
Vikram Ravi
Over 80% of the cosmic baryon density is likely to be distributed in the diffuse, K circum- and inter-galactic medium (CGM and IGM respectively). We demonstrate tha…
iPTF Archival Search for Fast Optical Transients
A. Y. Q. Ho, S. R. Kulkarni, P. E. Nugent +18
There has been speculation of a class of relativistic explosions with an initial Lorentz factor smaller than that of classical Gamma-Ray Bursts (GRBs). These "dirty fireballs" woul…