Results 81 to 90 of about 31,130 (257)

Whistler Chorus Amplification in the Magnetosphere: The Nonlinear Free‐Electron Laser Model and the Ginzburg‐Landau Equation

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We present a novel nonlinear model for whistler‐mode chorus amplification based on the free‐electron laser (FEL) mechanism. First, we derive the nonlinear collective variable equations for the whistler‐electron interaction. Consistent with in situ satellite observations, these equations predict that a small seed wave can undergo exponential ...
Brandon Bonham, Amitava Bhattacharjee
wiley   +1 more source

The AO327 Drift Survey Catalog and Data Release of Pulsar Detections

The Astrophysical Journal Supplement Series
The AO327 drift survey for radio pulsars and transients used the Arecibo telescope from 2010 until its collapse in 2020. AO327 collected ∼3100 hr of data at 327 MHz with a time resolution of 82 μ s and a frequency resolution of 24 kHz.
J. S. Deneva, M. McLaughlin, T. E. E. Olszanski, E. F. Lewis, D. Pang, P. C. C. Freire, M. Bagchi, K. Stovall   +7 more
doaj   +1 more source

Peculiarities of radio emission from new pulsars at 111 MHz

Open Astronomy, 2022
The analysis of radio emission of three new pulsars discovered at the Pushchino Radio Astronomy Observatory is presented. The detailed observations were carried out at a frequency of 111 MHz using the large phase array and the standard digital receiver ...
Teplykh Daria, Malofeev Valery, Malov Oleg, Tyul’bashev Sergey   +3 more
doaj   +1 more source

Artificial Intelligence‐Driven Proteomics Identifies Plasma Protein Signatures for Diagnosis and Stratification of Behçet's Disease

Advanced Science, Volume 12, Issue 35, September 18, 2025.
Molecular and functional landscape of BD progression and severity based on in‐depth proteomics. Tree boosting machine learning models with favorable performance in BD diagnosis and stratification. Efficient biomarker panels for BD diagnosis and stratification.
Linlin Cheng, Mansheng Li, Zhou Bai, Xiaobo Yu, Wenjie Zheng, Yongzhe Li, Yudong Liu   +6 more
wiley   +1 more source

Nature of Ultralong Period Radio Transients: Could They Be Strange Dwarf Pulsars?

The Astrophysical Journal
Ultralong period radio transients (ULPTs), with periods of thousands of seconds, challenge conventional pulsar models. We propose that these isolated sources are strange dwarf (SD) pulsars—compact objects with a strange quark matter core surrounded by a ...
Xia Zhou, Abdusattar Kurban, Wen-Tong Liu, Na Wang, Ya-Jing Yuan   +4 more
doaj   +1 more source

Profile and polarization characteristics of energetic pulsars

, 2008
In this paper we compare the characteristics of pulsars with a high spin-down energy loss rate (Edot) against those with a low Edot. We show that the differences in the total intensity pulse morphology between the two classes are in general rather subtle.
Barnard, Biggs, Blaskiewicz, Cheng, Crawford, D'Amico, Daugherty, Dyks, Dyks, Dyks, Dyks, Dyks, Everett, Gil, Gonthier, Gould, Gupta, Han, Han, Harding, Harding, Hotan, Huguenin, Johnston, Johnston, Johnston, Johnston, Karastergiou, Karastergiou, Keith, Kijak, Kramer, Kramer, Kramer, Lorimer, Lyne, Manchester, Manchester, Manchester, Manchester, Manchester, Manchester, Marquardt, Mitra, Mitra, Morini, Muslimov, Muslimov, Patrick Weltevrede, Pellizzoni, Petrova, Press, Qiao, Radhakrishnan, Radhakrishnan, Rankin, Rankin, Rankin, Romani, Romani, Simon Johnston, Smith, Thompson, van Straten, von Hoensbroech, von Mises, Weisberg, Weltevrede, Weltevrede, Weltevrede   +69 more
core   +2 more sources

Radio pulsars: already fifty years! [PDF]

Physics-Uspekhi, 2017
Abstract Although fifty years have passed since the discovery of radio pulsars, there is still no satisfactory understanding of how these amazing objects operate. While there has been significant progress in understanding the basic properties of radio pulsars, there is as yet no consensus on key issues, such as the nature of coherent ...
openaire   +2 more sources

Two Micron‐Size Dark Dimensions

Fortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui, Ignatios Antoniadis, Dieter Lüst   +2 more
wiley   +1 more source

The Discovery of a 41 s Radio Pulsar PSR J0311+1402 with ASKAP

The Astrophysical Journal Letters
The emerging population of long-period radio transients (LPTs) shows both similarities and differences with normal pulsars. A key difference is that their radio emission is too bright to be powered solely by rotational energy.
Yuanming Wang, Pavan A. Uttarkar, Ryan M. Shannon, Yu Wing Joshua Lee, Dougal Dobie, Ziteng Wang, Keith W. Bannister, Manisha Caleb, Adam T. Deller, Marcin Glowacki, Joscha N. Jahns-Schindler, Tara Murphy, Reshma Anna-Thomas, N. D. R. Bhat, Xinping Deng, Vivek Gupta, Akhil Jaini, Clancy W. James, John Tuthill   +18 more
doaj   +1 more source

VLT/NACO observations of the High-Magnetic field radio pulsar PSR J1119-6127

, 2007
Recent radio observations have unveiled the existence of a number of radio pulsars with spin-down derived magnetic fields in the magnetar range. However, their observational properties appears to be more similar to classical radio pulsars than to ...
Alpar, Anders, Arzoumanian, Baring, Beloborodov, Blackman, Brisken, Camilo, Camilo, Caraveo, Chakrabarty, Chatterjee, Dodson, Durant, Durant, Eikenberry, G. L. Israel, G. Lo. Curto, Gaensler, Gonzalez, Gonzalez, Gotthelf, Gotthelf, Hulleman, Hulleman, Illarionov, Israel, Israel, Israel, Kargaltsev, Kaspi, Koptsevich, Kothes, Lin, Lortet, McClure-Griffiths, Menou, Mereghetti, Michler, Mignani, Mignani, Morii, N. Rea, Patel, Pavlov, Perna, Perna, Predehl, R. P. Mignani, R. Perna, Rea, Rea, Rea, S. Mereghetti, Safi-Harb, Shibanov, Sollerman, Sollerman, Tiengo, Wachter, Wang, Wang, Woods, Woods   +63 more
core   +1 more source