Results 91 to 100 of about 654,536 (207)

Maximum Mass Limit of Generalized MIT Compact Star: A Theoretical Study of Thin Shell Dynamics and Gravitational Lensing

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract In this study, the properties, equilibrium, and stability of compact objects within the framework of teleparallel gravity with the generalized MIT bag model are investigated. By incorporating the modified field equations, the influence of the generalized bag constant on the structure and physical characteristics of quark stars and neutron ...
Sayantan Ghosh, Sneha Pradhan, Pradyumn Kumar Sahoo   +2 more
wiley   +1 more source

Interpretation of Binary Pulsar Observations [PDF]

Symposium - International Astronomical Union, 1981
The nature, dynamics and evolution of the three known radio pulsar binaries are discussed. The system containing 1913+16 appears to comprise two ~1.4 M⊙ components, and to undergo orbital decay as predicted by general relativity. It is proposed that 1913+16 has a neutron star companion and that 0655+64 and 0820+02 have white dwarf companions which ...
Blandford, R. D., DeCampli, W. M.
openaire   +3 more sources

The Green Bank North Celestial Cap Survey. IX. Timing Follow-up for 128 Pulsars

The Astrophysical Journal
The Green Bank North Celestial Cap survey is one of the largest and most sensitive searches for pulsars and transient radio objects. Observations for the survey have finished; priorities have shifted toward long-term monitoring of its discoveries.
A. E. McEwen, J. K. Swiggum, D. L. Kaplan, C. M. Tan, B. W. Meyers, E. Fonseca, G. Y. Agazie, P. Chawla, K. Crowter, M. E. DeCesar, T. Dolch, F. A. Dong, W. Fiore, E. Fonseca, D. C. Good, A. G. Istrate, V. M. Kaspi, V. I. Kondratiev, J. van Leeuwen, L. Levin, E. F. Lewis, R. S. Lynch, K. W. Masui, J. W. McKee, M. A. McLaughlin, H. Al Noori, E. Parent, S. M. Ransom, X. Siemens, R. Spiewak, I. H. Stairs   +30 more
doaj   +1 more source

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

PHYSICS OF OUR DAYS: Binary and recycled pulsars: 30 years after observational discovery

, 2021
Binary radio pulsars, first discovered by Hulse and Taylor in 1974 [1], are a unique tool for experimentally testing general relativity (GR), whose validity has been confirmed with a precision unavailable in laboratory experiments.
Bisnovatyi-Kogan Gennadiĭ S.
core  

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

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

Follow-up Timing of 12 Pulsars Discovered in Commensal Radio Astronomy FAST Survey

The Astrophysical Journal
We present phase-connected timing ephemerides, polarization pulse profiles, and Faraday rotation measurements of 12 pulsars discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the Commensal Radio Astronomy FAST Survey.
D. Zhao, J. P. Yuan, N. Wang, D. Li, P. Wang, M. Y. Xue, W. W. Zhu, C. C. Miao, W. M. Yan, J. B. Wang, J. M. Yao, Q. D. Wu, S. Q. Wang, S. N. Sun, F. F. Kou, Y. T. Chen, S. J. Dang, Y. Feng, Z. J. Liu, X. L. Miao, L. Q. Meng, M. Yuan, C. H. Niu, J. R. Niu, L. Qian, S. Wang, X. Y. Xie, Y. F. Xiao, Y. L. Yue, S. P. You, X. H. Yu, R. S. Zhao, R. Yuen, X. Zhou, L. Zhang, M. Xie, Y. X. Li, Y. B. Wang, Z. K. Luo, Z. Y. Gan, Z. Y. Sun, M. M. Chi, C. J. Wang   +42 more
doaj   +1 more source

A Systematic Search for Redback and Black Widow Candidates Based on the 4FGL-DR3 Unassociated Sources and the Zwicky Transient Facility Data

The Astrophysical Journal
Spider pulsars represent a unique subclass of radio millisecond pulsars in binaries, and are further categorized into black widows and redbacks according to the mass of the low-mass companion.
Chunyan Lu, Liangliang Ren, Jiamao Lin, Wenjun Huang, Hewen Yang, P. H. Thomas Tam   +5 more
doaj   +1 more source

Follow-up Timing of Two Binary Pulsars with Massive White Dwarfs Discovered in Commensal Radio Astronomy FAST Survey

The Astrophysical Journal
We present phase-connected timing solutions, total-intensity and polarized profiles for two newly discovered pulsars, PSRs J1929+4105 and J2359+4239, identified by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the Commensal Radio ...
D. Zhao, J. P. Yuan, N. Wang, D. Li, P. Wang, M. Y. Xue, W. W. Zhu, C. C. Miao, W. M. Yan, L. Li, J. B. Wang, J. M. Yao, Q. D. Wu, S. Q. Wang, J. T. Bai, S. N. Sun, F. F. Kou, Y. T. Chen, S. J. Dang, Y. Feng, X. L. Miao, L. Q. Meng, M. Yuan, C. H. Niu, J. R Niu, L. Qian, S. Wang, X. Y. Xie, Y. F. Xiao, Y. L. Yue, S. P. You, X. H. Yu, R. S. Zhao, R. Yuen, X. Zhou, L. Zhang, M. Xie, C. J. Wang, Y. B. Wang, Z. Y. Gan   +39 more
doaj   +1 more source