Results 101 to 110 of about 13,607 (215)

Identifying Pulsar Candidates in Interferometric Radio Images Using Scintillation

The Astrophysical Journal
Pulsars have been primarily detected by their narrow pulses or periodicity in time domain data. Interferometric surveys for pulsars are challenging due to the trade-off between beam sensitivity and beam size and the corresponding tradeoff between survey ...
Jitendra Salal, Shriharsh P. Tendulkar, Visweshwar Ram Marthi   +2 more
doaj   +1 more source

Precision Astrometry with the Very Long Baseline Array: Parallaxes and Proper Motions for 14 Pulsars

, 2009
Astrometry can bring powerful constraints to bear on a variety of scientific questions about neutron stars, including their origins, astrophysics, evolution, and environments.
A. G. Lyne, Arras, Arzoumanian, Beasley, Blazek, Bridle, Briggs, Brisken, Brisken, Brisken, Brisken, Chatterjee, Chatterjee, Chatterjee, Cordes, Cordes, Cornwell, Dame, De Luca, de Zeeuw, Deller, E. B. Fomalont, Faucher-Giguère, Fey, Fomalont, Fomalont, Fomalont, Haffner, Harrison, Helfand, Hoogerwerf, J. M. Cordes, Janka, Kaplan, Kaplan, Kaplan, Kaplan, Kramer, Lai, M. Kramer, Ma, Migliazzo, Ng, Ng, Petrov, Romney, S. Chatterjee, S. E. Thorsett, Socrates, Splaver, Standish, T. J. W. Lazio, Thorsett, Toscano, Verbiest, Vlemmings, W. F. Brisken, W. H. T. Vlemmings, W. M. Goss, Walker, Walker, Walter, Winkler, Zeiger   +63 more
core   +1 more source

A Multifrequency Census of 100 Pulsars below 100 MHz with LWA: A Systematic Study of Flux Density, Spectra, Timing, Dispersion, Polarization, and Its Variation from a Decade of Observations

The Astrophysical Journal
We present a census of 100 pulsars, the largest below 100 MHz, including 94 normal pulsars and six millisecond pulsars, with the Long Wavelength Array (LWA).
P. Kumar, G. B. Taylor, K. Stovall, J. Dowell, S. M. White   +4 more
doaj   +1 more source

A 34 yr Timing Solution of the Redback Millisecond Pulsar Terzan 5A

The Astrophysical Journal
We present a 34 yr timing solution of the redback pulsar system Terzan 5A (Ter5A). Ter5A, also known as B1744−24A or J1748−2446A, has a 11.56 ms pulse period, a ~0.1 M _⊙ dwarf companion star, and an orbital period of 1.82 hr.
Alexandra C. Rosenthal, Scott M. Ransom, Kyle A. Corcoran, Megan E. DeCesar, Paulo C. C. Freire, Jason W. T. Hessels, Michael J. Keith, Ryan S. Lynch, Andrew Lyne, David J. Nice, Ingrid H. Stairs, Ben Stappers, Jay Strader, Stephen E. Thorsett, Ryan Urquhart   +14 more
doaj   +1 more source

Have pulsar timing array methods detected a cosmological phase transition? [PDF]

, 2023
Andrea Addazi, Yi-Fu Cai, Antonino Marcianò, Luca Visinelli   +3 more
openalex   +1 more source

Bounding the Photon Mass with Ultrawide Bandwidth Pulsar Timing Data and Dedispersed Pulses of Fast Radio Bursts

The Astrophysical Journal
Exploring the concept of a massive photon has been an important area in astronomy and physics. If photons have mass, their propagation in nonvacuum space would be affected by both the nonzero mass m _γ and the presence of a plasma medium. This would lead
Yu-Bin Wang, Xia Zhou, Abdusattar Kurban, Fa-Yin Wang   +3 more
doaj   +1 more source

Strong equivalence principle and gravitational wave polarizations in Horndeski theory

European Physical Journal C: Particles and Fields, 2019
The relative acceleration between two nearby particles moving along accelerated trajectories is studied, which generalizes the geodesic deviation equation.
Shaoqi Hou, Yungui Gong
doaj   +1 more source

The GMRT High-resolution Southern Sky Survey for Pulsars and Transients. VII. Timing of the Spider Millisecond Pulsar PSR J1242–4712, a Bridge between Redback and Black Widow Pulsars

The Astrophysical Journal
We present a timing solution for the 5.31 ms spider millisecond pulsar (MSP) J1242−4712, discovered with the GMRT. PSR J1242−4712 orbits a companion of minimum mass 0.08 M _⊙ with an orbital period of 7.7 hr and occupies a relatively unexplored region in
Ankita Ghosh, Bhaswati Bhattacharyya, Andrew Lyne, David L. Kaplan, Jayanta Roy, Paul S. Ray, Ben Stappers, Sangita Kumari, Shubham Singh, Rahul Sharan   +9 more
doaj   +1 more source

Improving Pulsar Timing Precision with Single Pulse Fluence Clustering

The Astrophysical Journal
Traditional pulsar timing techniques involve averaging large numbers of single pulses to obtain a high signal-to-noise ratio (S/N) profile, which is cross-correlated with a template to measure a time of arrival (TOA).
Sofia V. Sosa Fiscella, Michael T. Lam, Maura A. McLaughlin   +2 more
doaj   +1 more source

The Polarizations of Gravitational Waves

Universe, 2018
The gravitational wave provides a new method to examine General Relativity and its alternatives in the high speed, strong field regime. Alternative theories of gravity generally predict more polarizations than General Relativity, so it is important to ...
Yungui Gong, Shaoqi Hou
doaj   +1 more source