Results 51 to 60 of about 512 (177)

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Discovery of three binary millisecond pulsars

The Astrophysical Journal, 1994
We report the discovery of three binary millisecond pulsars in circular orbits with low-mass companions from a continuing survey of the southern sky with the Parkes radio telescope. The three pulsars, PSR J0034-0534, PSR J1045-4509, and PSR J2145-0750 have pulse periods of 1.87, 7.47, and 16.05 ms and orbital periods of 1.6, 4.1, and 6.8 days ...
Bailes, M., Harrison, P. A., Lorimer, D. R., Johnston, S., Lyne, A. G., Manchester, R. N., D'Amico, N., Nicastro, L., Tauris, T. M., Robinson, C.   +9 more
openaire   +3 more sources

Millisecond Pulsars in M2: New Discoveries and a Detailed Timing Analysis

The Astrophysical Journal
Globular clusters (GCs) offer a unique environment for discovering and studying millisecond pulsars. In this paper, we present a multiepoch search and detailed timing analysis of millisecond pulsars in the GC M2, using the Five-hundred-meter Aperture ...
Baoda Li, Kuo Liu, Lin Wang, Shunyi Lan, P. C. C. Freire, Pinsong Zhao, Liyun Zhang, Zhengwei Liu, Lei Qian, Wu Jiang, Dejiang Yin, Yaowei Li, Yinfeng Dai, Yang Liu, Xiangcun Meng, Zhichen Pan   +15 more
doaj   +1 more source

Measuring the Lense–Thirring Orbital Precession and the Neutron Star Moment of Inertia with Pulsars

Universe
Neutron stars (NSs) are compact objects that host the densest forms of matter in the observable universe, providing unique opportunities to study the behaviour of matter at extreme densities.
Huanchen Hu, Paulo C. C. Freire
doaj   +1 more source

Testing f(R)-Theories by Binary Pulsars

Acta Polytechnica CTU Proceedings, 2014
Using the Post-Keplerian parameters to obtain, in the Minkowskian limit we obtain constraints on f(R)-theories of gravity from the first time derivative of the orbital period of a sample of binary stars. In the approximation in which the theory is Taylor
Mariafelicia De Laurentis, Ivan De Martino   +1 more
doaj   +1 more source

The GMRT High Resolution Southern Sky Survey for Pulsars and Transients. IV. Discovery of Four New Pulsars with an FFA Search

The Astrophysical Journal, 2023
The fast Fourier transform (FFT) based periodicity search methods provide an efficient way to search for millisecond and binary pulsars but encounter significant sensitivity degradation while searching for long period and short duty cycle pulsars.
S. Singh, J. Roy, B. Bhattacharyya, U. Panda, B. W. Stappers, M. A. McLaughlin   +5 more
doaj   +1 more source

Searching for Pulsars in Globular Clusters with the Fast-folding Algorithm and a New Pulsar Discovered in M13

The Astrophysical Journal
We employed the fast-folding algorithm on L -band globular cluster (GC) observations taken with the Five-hundred-meter Aperture Spherical radio Telescope to search for new pulsars, especially those with a long rotational period.
Yaowei Li, Lin Wang, Lei Qian, Liyun Zhang, Yujie Chen, Dejiang Yin, Baoda Li, Yinfeng Dai, Ralph P. Eatough, Wenze Li, Dongyue Jiang, Xingnan Zhang, Minghui Li, Yujie Lian, Yuxiao Wu, Tong Liu, Kuo Liu, Zhichen Pan   +17 more
doaj   +1 more source

Genetic modification of Water spinach (Ipomoea aquatica), a genoprotective perennial leafy green

Physiologia Plantarum, Volume 177, Issue 3, May/June 2025.
Abstract Improvement of leafy greens, especially perennials with year‐round harvesting, is binding to the food security drive. “Food for All” by WHO demands the improvement of regional crops due to the agroclimatic specificity to ensure regional food security.
Fayas Thayale Purayil, Mariam Alzaabi, Shina Sasi, Saranya Krishnan, Zarreen Badar, Ling Li, Martin Kottackal, Khaled M. A. Amiri   +7 more
wiley   +1 more source

Follow-up Investigation of 11 Pulsars Discovered in the Commensal Radio Astronomy FAST Survey

The Astrophysical Journal
In this paper, we study 11 pulsars that were discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the Commensal Radio Astronomy FAST Survey.
K. Yang, L. Li, J. P. Yuan, N. Wang, D. Li, P. Wang, C. C. Miao, W. W. Zhu, M. Y. Xue, W. M. Yan, J. B. Wang, R. Yuen, G. L. Lü, C. H. Zhu, J. M. Yao, Q. D. Wu, S. Q. Wang, S. N. Sun, F. F. Kou, D. Zhao, Z. Wang, J. Xu, C. Sun, Y. Feng, Z. J. Liu, X. L. Miao, L. Q. Meng, C. H. Niu, J. R. Niu, L. Qian, X. Y. Xie, Y. F. Xiao, Y. L. Yue, S. P. You, S. J. Dang, X. H. Yu, R. S. Zhao, X. Zhou, L. Zhang, J. F. Wu, C. J. Wang, Y. B. Wang, Z. Y. Gan   +42 more
doaj   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source