324 citations · 4.9k across the 84 of their papers we have counts for
86 papers
A Melody in the Noise: Modeling Echoes of the Crab Nebula
Thierry Serafin Nadeau, Marten H. van Kerkwijk
Pulses from the Crab pulsar are often followed by "echoes", produced by radiation that was deflected by structures in the Crab nebula and thus traveled via longer paths. We describ…
Echoes in Different Tempo: Long-Term Monitoring of Crab Echoes with CHIME
Thierry Serafin Nadeau, Marten H. van Kerkwijk, Jing Luo +4
The Crab Pulsar is known to feature plasma lensing events known as echoes. These events are characterized by additional components in the pulse profile which are produced by additi…
Associations Between Scattering Screens and Interstellar Medium Filaments
Ashley M. Stock, Marten H. van Kerkwijk
Pulsar scintillation can be used to measure small scale structure in the Galaxy, but little is known about the specific interstellar medium features that cause scintillation. We se…
A Cacophony of Echoes from daily monitoring of the Crab Pulsar at Jodrell Bank
Thierry Serafin Nadeau, Marten H. van Kerkwijk, Cees G. Bassa +3
Using archival data from the 42 foot telescope at the Jodrell Bank Observatory, we produce daily stacks of aligned giant pulses for the Crab pulsar, to study changes to the daily p…
Intrinsic Emission of PSR B1937+21 at 327 MHz
Nikhil Mahajan, Marten H. van Kerkwijk
At 327 MHz, the observed emission of PSR B1937+21 is greatly affected by scattering in the interstellar medium, on a timescale of order the pulse period. We use the bright impulsiv…
High Sensitivity Beamformed Observations of the Crab Pulsar's Radio Emission
Rebecca Lin, Marten H. van Kerkwijk
We analyzed four epochs of beamformed EVN data of the Crab Pulsar at 1658.49 MHz. With the high sensitivity resulting from resolving out the Crab Nebula, we are able to detect even…
The Radio Parallax of the Crab Pulsar: A First VLBI Measurement Calibrated with Giant Pulses
Rebecca Lin, Marten H. van Kerkwijk, Franz Kirsten +2
We use four observations with the European VLBI network to measure the first precise radio parallax of the Crab Pulsar. We found two in-beam extragalactic sources just outside the…
Using Giant Pulses to Measure the Impulse Response of the Interstellar Medium
Nikhil Mahajan, Marten H. van Kerkwijk
Giant pulses emitted by PSR B1937+21 are bright, intrinsically impulsive bursts. Thus, the observed signal from a giant pulse is a noisy but direct measurement of the impulse respo…
High Resolution VLBI Astrometry of pulsar scintillation screens with the Transform
Daniel Baker, Walter Brisken, Marten H. van Kerkwijk +2
The recent development of $θ\mhyphenθ$ techniques in pulsar scintillometry has opened the door for new high resolution imaging techniques of the scattering medium. By solving the p…
Resolving the Emission Regions of the Crab Pulsar's Giant Pulses II. Evidence for Relativistic Motion
Rebecca Lin, Marten H. van Kerkwijk, Robert Main +3
The Crab Pulsar is the prime example of an emitter of giant pulses. These short, very bright pulses are thought to originate near the light cylinder, at from…
CHIME Discovery of a Binary Pulsar with a Massive Non-Degenerate Companion
Bridget C. Andersen, Emmanuel Fonseca, J. W. McKee +25
Of the more than radio pulsars currently known, only are in binary systems, and only five of these consist of young pulsars with massive non-degenerate compan…
Multi-colour optical light curves of the companion star to the millisecond pulsar PSR J2051-0827
V. S. Dhillon, M. R. Kennedy, R. P. Breton +16
We present simultaneous, multi-colour optical light curves of the companion star to the black-widow pulsar PSR J2051-0827, obtained approximately 10 years apart using ULTRACAM and…
Plasma lensing near the eclipses of the Black Widow pulsar B1957+20
Fang Xi Lin, Robert Main, Dylan Jow +3
Recently, several eclipsing millisecond pulsars have been shown to experience strong and apparent weak lensing from the outflow of their ionized companions. Lensing can be a powerf…
Pulsar Double-lensing Sheds Light on the Origin of Extreme Scattering Events
Hengrui Zhu, Daniel Baker, Ue-Li Pen +2
In extreme scattering events, the brightness of a compact radio source drops significantly, as light is refracted out of the line of sight by foreground plasma lenses. Despite rece…
Interstellar Interferometry: Precise Curvature Measurement from Pulsar Secondary Spectra
Daniel Baker, Walter Brisken, Marten H. van Kerkwijk +4
The parabolic structure of the secondary or conjugate spectra of pulsars is often the result of isolated one-dimensional (or at least highly anisotropic) lenses in the ISM. The cur…
Resolving the emission regions of the Crab pulsar's giant pulses
Robert Main, Rebecca Lin, Marten H. van Kerkwijk +5
The Crab pulsar has striking radio emission properties, with the two dominant pulse components -- the main pulse and the interpulse -- consisting entirely of giant pulses. The emis…
Descattering of Giant Pulses in PSR B1957+20
Robert Main, Marten van Kerkwijk, Ue-Li Pen +2
The interstellar medium scatters radio waves which causes pulsars to scintillate. For intrinsically short bursts of emission, the observed signal should be a direct measurement of…
Hubble Space Telescope detection of the millisecond pulsar J2124-3358 and its far-ultraviolet bow shock nebula
B. Rangelov, G. G. Pavlov, O. Kargaltsev +4
We observed a nearby millisecond pulsar J2124-3358 with the Hubble Space Telescope in broad far-UV (FUV) and optical filters. The pulsar is detected in both bands with fluxes F(125…
Chasing the Identification of ASCA Galactic Objects (ChIcAGO) - An X-ray Survey of Unidentified Sources in the Galactic Plane I: Source Sample and Initial Results
G. E. Anderson, B. M. Gaensler, D. L. Kaplan +18
We present the Chasing the Identification of ASCA Galactic Objects (ChIcAGO) survey, which is designed to identify the unknown X-ray sources discovered during the ASCA Galactic Pla…
Spectroscopy of the inner companion of the pulsar PSR J0337+1715
David L. Kaplan, Marten H. van Kerkwijk, Detlev Koester +5
The hierarchical triple system PSR J0337+1715 offers an unprecedented laboratory to study secular evolution of interacting systems and to explore the complicated mass-transfer hist…
A millisecond pulsar in a stellar triple system
S. M. Ransom, I. H. Stairs, A. M. Archibald +18
Gravitationally bound three-body systems have been studied for hundreds of years and are common in our Galaxy. They show complex orbital interactions, which can constrain the compo…
A Metal-Rich Low-Gravity Companion to a Massive Millisecond Pulsar
David L. Kaplan, Varun B. Bhalerao, Marten H. van Kerkwijk +3
Most millisecond pulsars with low-mass companions are in systems with either helium-core white dwarfs or non-degenerate ("black widow" or "redback") stars. A candidate counterpart…
Discovery of the Optical Counterparts to Four Energetic Fermi Millisecond Pulsars
R. P. Breton, M. H. van Kerkwijk, M. S. E. Roberts +6
In the last few years, over 43 millisecond radio pulsars have been discovered by targeted searches of unidentified gamma-ray sources found by the Fermi Gamma-Ray Space Telescope. A…
Rapidly accreting white dwarfs as supernova type Ia progenitors
Kelly Lepo, Marten van Kerkwijk
The nature of the progenitors of type Ia supernovae is still a mystery. While plausible candidates are known for both the single degenerate and double degenerate models, the observ…