Results 61 to 70 of about 13,579 (182)

Pulse Profile Variability of PSR J1022+1001 in NANOGrav Data

The Astrophysical Journal
Pulse profile stability is a central assumption of standard pulsar timing methods. Thus, it is important for pulsar timing array experiments such as the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) to account for any pulse ...
William Fiore, Maura A. McLaughlin, Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Paul T. Baker, Paul R. Brook, H. Thankful Cromartie, Kathryn Crowter, Megan E. DeCesar, Paul B. Demorest, Lankeswar Dey, Timothy Dolch, Elizabeth C. Ferrara, Emmanuel Fonseca, Gabriel E. Freedman, Nate Garver-Daniels, Peter A. Gentile, Joseph Glaser, Deborah C. Good, Jeffrey S. Hazboun, Ross J. Jennings, Megan L. Jones, David L. Kaplan, Matthew Kerr, Michael T. Lam, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Alexander McEwen, Natasha McMann, Bradley W. Meyers, Cherry Ng, David J. Nice, Timothy T. Pennucci, Benetge B. P. Perera, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Ann Schmiedekamp, Carl Schmiedekamp, Brent J. Shapiro-Albert, Ingrid H. Stairs, Kevin Stovall, Abhimanyu Susobhanan, Joseph K. Swiggum, Haley M. Wahl   +48 more
doaj   +1 more source

Pulsar Timing Response to Gravitational Waves with Spherical Wave Fronts from a Massive Compact Source in the Quadrupole Approximation

The Astrophysical Journal, 2023
Pulsar timing arrays (PTAs) are searching for nanohertz-frequency gravitational waves (GWs) through cross-correlation of pulse arrival times from a set of radio pulsars.
Ryousuke Kubo, Kakeru Yamahira, Hideki Asada   +2 more
doaj   +1 more source

An Improved Wiener Filtration Method for Constructing the Ensemble Pulsar Timescale

The Astrophysical Journal
An improved Wiener filtration (WF) method for constructing the ensemble pulsar timescale (EPT) is proposed to solve the existing problems in the WF algorithm.
Zhehao Zhang, Minglei Tong, Tinggao Yang
doaj   +1 more source

Pulsar Cyclic Spectroscopy in the Partial-deconvolution Regime: Benefits and Limitations

The Astrophysical Journal
We explore possible advantages of cyclic spectroscopy for observations of pulsars in instances where full cyclic deconvolution is not possible. We compute cyclic merits and full-deconvolution regime boundaries for pulsars observed by NANOGrav and discuss
Jacob E. Turner, Timothy Dolch, Paul B. Demorest, Ryan S. Lynch, Daniel R. Stinebring, Cody Jessup, Nathaniel Jones, Christopher Scheithauer   +7 more
doaj   +1 more source

Stochastic Wave Dark Matter with Fermi-LAT γ-Ray Pulsar Timing Array

The Astrophysical Journal Letters
Pulsar timing arrays (PTAs) can detect disturbances in the fabric of spacetime on a galactic scale by monitoring the arrival time of pulses from millisecond pulsars (MSPs).
Hoang Nhan Luu, Tao Liu, Jing Ren, Tom Broadhurst, Ruizhi Yang, Jie-Shuang Wang, Zhen Xie   +6 more
doaj   +1 more source

Prospects for Probing the Spacetime of Sgr A* with Pulsars

, 2011
The discovery of radio pulsars in compact orbits around Sgr A* would allow an unprecedented and detailed investigation of the spacetime of the supermassive black hole.
Angélil, Aschenbach, Bélanger, Cordes, Cordes, Cordes, Damour, Deneva, Ghez, Gillessen, Heusler, J. M. Cordes, Jacoby, Johannsen, Johnston, K. Liu, Keshet, Kramer, Kramer, Kramer, Lorimer, Löhmer, M. Kramer, Macquart, Melatos, N. Wex, Penrose, Pfahl, Psaltis, Psaltis, Pugh, Sadeghian, T. J. W. Lazio, Taylor, Wang, Wang, Wex, Wex, Wharton, Will, Yuan   +40 more
core   +1 more source

Retracing the Cold Plasma Dispersion Law in Pulsar B0329+54: New Insights into Frequency-dependent Dispersion Measures

The Astrophysical Journal
Multiple studies have investigated potential frequency-dependent dispersion measures (DMs) in PSR B0329+54, with sensitivities at levels of 10 ^−3 pc cm ^−3 or higher, using frequencies below 1 GHz. Utilizing the extensive bandwidth of the upgraded Giant
Shyam S. Sharma, Tetsuya Hashimoto, Tomotsugu Goto, Shotaro Yamasaki, Simon C.-C. Ho   +4 more
doaj   +1 more source

How to take the interstellar weather with you in pulsar timing analysis [PDF]

, 2013
Here we present a Bayesian method of including discrete measurements of dispersion measure due to the interstellar medium in the direction of a pulsar as prior information in the analysis of that pulsar. We use a simple simulation to show the efficacy of
Alexander, Paul, Hobson, Michael P., Lentati, Lindley   +2 more
core  

What the Timing of Millisecond Pulsars Can Teach us about Their Interior

, 2014
The cores of compact stars reach the highest densities in nature and therefore could consist of novel phases of matter. We demonstrate via a detailed analysis of pulsar evolution that precise pulsar timing data can constrain the star's composition ...
Alford, Mark G., Schwenzer, Kai
core   +1 more source

Noisy Timing Behavior is a Feature of Central Compact Object Pulsars

The Astrophysical Journal
We present a timing study of the three known central compact object (CCO) pulsars, isolated cooling neutron stars in supernova remnants, using observations from Chandra, XMM-Newton, and NICER spanning two decades.
K. I. Perez, E. V. Gotthelf, J. P. Halpern   +2 more
doaj   +1 more source