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Pulsar searches and timing with the SKA
R. Smits, M. Kramer, B. Stappers +3
The Square Kilometre Array (SKA) is a planned multi purpose radio telescope with a collecting area approaching 1 million square metres. One of the key science objectives of the SKA…
Arecibo Pulsar Survey Using ALFA: Probing Radio Pulsar Intermittency and Transients
J. S. Deneva, J. M. Cordes, M. A. McLaughlin +23
We present radio transient search algorithms, results, and statistics from the ongoing Arecibo Pulsar ALFA (PALFA) Survey of the Galactic plane. We have discovered seven objects by…
PSR J1856+0245: Arecibo Discovery of a Young, Energetic Pulsar Coincident with the TeV Gamma-ray Source HESS J1857+026
J. W. T. Hessels, D. J. Nice, B. M. Gaensler +21
We present the discovery of the Vela-like radio pulsar J1856+0245 in the Arecibo PALFA survey. PSR J1856+0245 has a spin period of 81ms, a characteristic age of 21kyr, and a spin-d…
An Eccentric Binary Millisecond Pulsar in the Galactic Plane
D. J. Champion, S. M. Ransom, P. Lazarus +28
Binary pulsar systems are superb probes of stellar and binary evolution and the physics of extreme environments. In a survey with the Arecibo telescope, we have found PSR J1903+032…
Rocking the Lighthouse: Circumpulsar Asteroids and Radio Intermittency
J. M. Cordes, R. M. Shannon
We propose that neutral, circumpulsar debris entering the light cylinder can account for many time-dependent pulsar phenomena that are otherwise difficult to explain. Neutral mater…
Transient radio bursts from rotating neutron stars
M. A. McLaughlin, A. G. Lyne, D. R. Lorimer +11
The `radio sky' is relatively unexplored for transient signals, although the potential of radio-transient searches is high, as demonstrated recently by the discovery of a previousl…
The young, highly relativistic binary pulsar J1906+0746
D. R. Lorimer, I. H. Stairs, P. C. C. Freire +33
We report the discovery of PSR J1906+0746, a young 144-ms pulsar in a highly relativistic 3.98-hr orbit with an eccentricity of 0.085 and expected gravitational wave coalescence ti…
Arecibo Pulsar Survey Using ALFA. I. Survey Strategy and First Discoveries
J. M. Cordes, P. C. C. Freire, D. R. Lorimer +21
We report results from the initial stage of a long-term pulsar survey of the Galactic plane using the Arecibo L-band Feed Array (ALFA), a seven-beam receiver operating at 1.4 GHz w…
Getting Its Kicks: A VLBA Parallax for the Hyperfast Pulsar B1508+55
S. Chatterjee, W. H. T. Vlemmings, W. F. Brisken +7
The highest velocity neutron stars establish stringent constraints on natal kicks, asymmetries in supernova core collapse, and the evolution of close binary systems. Here we presen…
Pulsar Astrometry at the Microarcsecond Level
W. H. T. Vlemmings, S. Chatterjee, W. F. Brisken +12
Determination of pulsar parallaxes and proper motions addresses fundamental astrophysical questions. We have recently finished a VLBI astrometry project to determine the proper mot…
Arecibo timing and single-pulse observations of 17 pulsars
D. J. Champion, D. R. Lorimer, M. A. McLaughlin +6
We report on timing and single-pulse observations of 17 pulsars discovered at the Arecibo observatory. The highlights of our sample are the recycled pulsars J1829+2456, J1944+0907…
A 2.1 Solar Mass Pulsar Measured by Relativistic Orbital Decay
David J. Nice, Eric M. Splaver, Ingrid H. Stairs +4
PSR J0751+1807 is a millisecond pulsar in a circular 6 hr binary system with a helium white dwarf secondary. Through high precision pulse timing measurements with the Arecibo and E…
Pulsars as Tools for Fundamental Physics and Astrophysics
J. M. Cordes, M. Kramer, T. J. W. Lazio +3
The sheer number of pulsars discovered by the SKA, in combination with the exceptional timing precision it can provide, will revolutionize the field of pulsar astrophysics. The SKA…
The Microarcsecond Sky and Cosmic Turbulence
T. Joseph W. Lazio, J. M. Cordes, A. G. de Bruyn +1
Radio waves are imprinted with propagation effects from ionized media through which they pass. Owing to electron density fluctuations, compact sources (pulsars, masers, and compact…
The Dynamic Radio Sky
James M. Cordes, T. Joseph W. Lazio, M. A. McLaughlin
Transient radio sources are necessarily compact and usually are the locations of explosive or dynamic events, therefore offering unique opportunities for probing fundamental physic…
Theory of Parabolic Arcs in Interstellar Scintillation Spectra
James M. Cordes, Barney J. Rickett, Daniel R. Stinebring +1
Our theory relates the secondary spectrum, the 2D power spectrum of the radio dynamic spectrum, to the scattered pulsar image in a thin scattering screen geometry. Recently discove…
New Binary and Millisecond Pulsars from Arecibo Drift-Scan Searches
M. A. McLaughlin, D. R. Lorimer, D. J. Champion +6
We discuss four recycled pulsars found in Arecibo drift-scan searches. PSR J1944+0907 has a spin period of 5.2 ms and is isolated. The 5.8-ms pulsar J1453+19 may have a low-mass co…
Separated at Birth: The origin of the pulsars B2020+28 and B2021+51 in the Cygnus Superbubble
W. H. T. Vlemmings, J. M. Cordes, S. Chatterjee
High precision astrometric data have enabled us to determine the trajectories through the Galactic potential for a growing number of pulsars. This has resulted in the discovery of…
PSR J1829+2456: a relativistic binary pulsar
D. J. Champion, D. R. Lorimer, M. A. McLaughlin +4
We report the discovery of a new binary pulsar, PSR J1829+2456, found during a mid-latitude drift-scan survey with the Arecibo telescope. Our initial timing observations show the 4…
Pulsar Parallaxes at 5 GHz with the Very Long Baseline Array
S. Chatterjee, J. M. Cordes, W. H. T. Vlemmings +3
We present the first pulsar parallaxes measured with phase-referenced pulsar VLBI observations at 5 GHz. Due to the steep spectra of pulsars, previous astrometric measurements have…
Smashing the Guitar: An Evolving Neutron Star Bow Shock
S. Chatterjee, J. M. Cordes
The Guitar nebula is a spectacular example of an H-alpha bow shock nebula produced by the interaction of a neutron star with its environment. The radio pulsar B2224+65 is traveling…
New Pulsars Discovered in Arecibo Drift-Scan Searches
M. A. McLaughlin, D. R. Lorimer, D. J. Champion +6
We report on new pulsars discovered in Arecibo drift-scan data. Processing of 2200 square degrees of data has resulted in the detection of 41 known and 12 new pulsars. New pulsars…
The Brightest Pulses in the Universe: Multifrequency Observations of the Crab Pulsar's Giant Pulses
J. M. Cordes, N. D. R. Bhat, T. H. Hankins +2
We analyze the Crab pulsar at ten frequencies from 0.43 to 8.8 GHz using data obtained at the Arecibo Observatory. Giant pulses occur only in the main and interpulse components man…
Searches for Giant Pulses from Extragalactic Pulsars
M. A. McLaughlin, J. M. Cordes
We discuss the giant-pulse phenomenon exhibited by pulsars and the distances to which giant pulses might be detected from extragalactic pulsars. We describe the conditions under wh…