Results 71 to 80 of about 13,694 (217)

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

Online circular contrast perimetry: Tablet validation study against desktop test and standard automated perimetry

Optometry and Vision Science, Volume 103, Issue 4, April 2026.
ABSTRACT Purpose To assess correlation, agreement and diagnostic accuracy of a new tablet‐based 24‐degree, 52‐point online circular contrast perimetry application (OCCP), compared to computer‐based OCCP and standard automated perimetry (SAP). Methods Seventy‐five participants (26 controls, 49 glaucomatous) were tested via SAP using Humphrey field ...
Rahman Abdul, Abdul A. Khoder, Angela Gong, Lazar Busija, Simon E. Skalicky   +4 more
wiley   +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

The Interplay Between IL‐6, Hepcidin, and BMPR2 Signalling in Pulmonary Arterial Hypertension: Mechanistic Insights Into Vascular Remodelling

Pulmonary Circulation, Volume 16, Issue 2, June 2026.
ABSTRACT Pulmonary arterial hypertension (PAH) is characterized by excessive pulmonary vasoconstriction and vascular remodelling, with mutations in bone morphogenetic protein receptor type 2 (BMPR2) being the most common genetic alteration associated with the disease.
Quezia K. Toe, Theo Issitt, Gregory J. Quinlan, S. John Wort   +3 more
wiley   +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

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

The Pointing Error Due To Laser Propagation in Space Plasma for TianQin Gravitational Wave Detection

Space Weather, Volume 24, Issue 4, April 2026.
Abstract TianQin, a space‐borne gravitational wave observatory, is designed to detect gravitational‐wave signals via laser interferometry. As the inhomogeneous space plasma surrounds the inter‐satellite laser links, the propagation of the laser in space plasma can introduce pointing error noise.
Shenwei Zhou, Wei Su, Shiyuan Zhou, Chaofan Li, Jixiang Zhang   +4 more
wiley   +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

The NANOGrav 15 yr Data Set: Detector Characterization and Noise Budget

The Astrophysical Journal Letters, 2023
Pulsar timing arrays (PTAs) are galactic-scale gravitational wave (GW) detectors. Each individual arm, composed of a millisecond pulsar, a radio telescope, and a kiloparsecs-long path, differs in its properties but, in aggregate, can be used to extract ...
Gabriella Agazie, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Paul T. Baker, Bence Bécsy, Laura Blecha, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Maria Charisi, Shami Chatterjee, Tyler Cohen, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Kathryn Crowter, Megan E. DeCesar, Paul B. Demorest, Timothy Dolch, Brendan Drachler, Elizabeth C. Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Nate Garver-Daniels, Peter A. Gentile, Joseph Glaser, Deborah C. Good, Lydia Guertin, Kayhan Gültekin, Jeffrey S. Hazboun, Ross J. Jennings, Aaron D. Johnson, Megan L. Jones, Andrew R. Kaiser, David L. Kaplan, Luke Zoltan Kelley, Matthew Kerr, Joey S. Key, Nima Laal, Michael T. Lam, William G. Lamb, T. Joseph W. Lazio, Natalia Lewandowska, Tingting Liu, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Chung-Pei Ma, Dustin R. Madison, Alexander McEwen, James W. McKee, Maura A. McLaughlin, Natasha McMann, Bradley W. Meyers, Chiara M. F. Mingarelli, Andrea Mitridate, Cherry Ng, David J. Nice, Stella Koch Ocker, Ken D. Olum, Timothy T. Pennucci, Benetge B. P. Perera, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Joseph D. Romano, Shashwat C. Sardesai, Ann Schmiedekamp, Carl Schmiedekamp, Kai Schmitz, Brent J. Shapiro-Albert, Xavier Siemens, Joseph Simon, Magdalena S. Siwek, Ingrid H. Stairs, Daniel R. Stinebring, Kevin Stovall, Abhimanyu Susobhanan, Joseph K. Swiggum, Stephen R. Taylor, Jacob E. Turner, Caner Unal, Michele Vallisneri, Sarah J. Vigeland, Haley M. Wahl, Caitlin A. Witt, Olivia Young, The NANOGrav Collaboration   +91 more
doaj   +1 more source

High signal-to-noise ratio observations and the ultimate limits of precision pulsar timing

, 2011
We demonstrate that the sensitivity of high-precision pulsar timing experiments will be ultimately limited by the broadband intensity modulation that is intrinsic to the pulsar's stochastic radio signal. That is, as the peak flux of the pulsar approaches
Andrews, Backer, Backer, Bailes, Bailes, Bartel, Bhat, Boynton, Britton, Cairns, Cognard, Coles, Cordes, Cordes, Cordes, Davis, Dewey, Drake, Durdin, Foster, G. B. Hobbs, Groth, Groth, Groth, Gwinn, Gwinn, Gwinn, Gwinn, Gwinn, Gwinn, Hankins, Hankins, Hankins, Helfand, Helfand, Hellings, Hoaglin, Hobbs, Hobbs, Hotan, Hotan, Hotan, Hubert, Hyvarinen, Jenet, Jenet, Jenet, Johnson, Johnston, Karastergiou, Karastergiou, Kaspi, Kinkhabwala, Kramer, Kramer, Kramer, Kramer, Kramer, Kulkarni, Liu, Lyne, M. Bailes, Manchester, Manchester, Manchester, Matsakis, Navarro, P. Demorest, Petit, Rathnasree, Rickett, Rodin, S. Osłowski, Sallmen, Sandhu, Shannon, Smits, Staelin, Stairs, Staveley-Smith, Taylor, Taylor, Taylor, van Haasteren, van Straten, van Straten, van Straten, van Straten, van Straten, van Straten, Verbiest, Vivekanand, Vivekanand, W. van Straten, Wang, Weisberg, Yan, Yardley   +97 more
core   +1 more source