Results 91 to 100 of about 31,557 (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

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

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

Radio pulsar death

, 2002
Pulsar radio emission is believed to be originated from the electron-positron pairs streaming out from the polar cap region. Pair formation, an essential condition for pulsar radio emission, is believed to be sustained in active pulsars via one photon process from either the curvature radiation (CR) or the inverse Compton scattering (ICS) seed photons,
openaire   +2 more sources

Radio Pulsars — an Observer’S Perspective [PDF]

, 2001
(corrected minor typo) 16 pages, 12 figures. uses crckapb.sty, to appear in the proceedings of the NATO ASI "The Neutron Star - Black Hole Connection"
openaire   +2 more sources

The Frequency-dependent Modulation Features of PSR J1948+3540

The Astrophysical Journal
Using observations from the Giant Metrewave Radio Telescope and FAST, we conducted multiwavelength studies on PSR J1948+3540 and analyzed its intensity modulation characteristics in detail.
Kaige Chang, Na Wang, Feifei Kou, Wenming Yan, Jianping Yuan, Shijun Dang, Jumei Yao, Vishal Gajjar, Xia Zhou   +8 more
doaj   +1 more source

Searching for pulsed emission from XTE J0929-314 at high radio frequencies

, 2009
The aim of this work is to search for radio signals in the quiescent phase of accreting millisecond X-ray pulsars, in this way giving an ultimate proof of the recycling model, thereby unambiguously establishing that accreting millisecond X-ray pulsars ...
A. Possenti, Alpar, Altamirano, Bhattacharya, Brown, Burderi, Burderi, Burgay, Campana, Casella, Colpi, Cordes, D'Amico, D'Avanzo, Di Salvo, Di Salvo, Eggleton, Emmering, Galloway, Kramer, Krimm, L. Burderi, M. Burgay, M. N. Iacolina, Manchester, Monelli, Rappaport, Rutledge, Shakura, T. Di Salvo, Taylor, Wijnands   +31 more
core   +1 more source

On the Transition Stage of Pulsar Pulsed Radio Emission and Its Potential Association with Radio Pulsar Nulling

The Astrophysical Journal
While the precise mechanism of generating pulsed coherent radio emission from pulsars remains elusive, certain gap-invoking models (especially, the inner gap model) offer a comprehensive and plausible explanation for the genesis and termination of such ...
Shuang Du
doaj   +1 more source

Pulsar radio emission beams [PDF]

International Astronomical Union Colloquium, 2000
Abstract We study the structure of the pulsar beam using the analysis of beam radius. We indentify three emission cones in radio beams. The dependence of the beam radius on frequency is obtained.
openaire   +1 more source

Further Investigations into Emission Components of PSR B0950+08 and Correlations between Them with Single Pulses

The Astrophysical Journal
With the phase-to-phase cross-correlation method, we analyzed the single pulses of PSR B0950+08 obtained at the Five-hundred-meter Aperture Spherical radio Telescope.
Jie Liu, Zhen Yan, Hao Tong, Hong-Guang Wang, Zhi-Qiang Shen, Rui Wang, Xiao-Wei Wang, Zhi-Peng Huang   +7 more
doaj   +1 more source