Results 91 to 100 of about 31,130 (257)

New Mechanism of Pulsar Radio Emission

Physical Review Letters, 2002
It is shown that pulsar radio emission can be generated effectively through a streaming motion in the polar-cap regions of a pulsar magnetosphere causing nonresonant growth of waves that can escape directly. As in other beam models, a relatively low-energy high-density beam is required. The instability generates quasi-transverse waves in a beam mode at
Gedalin, M., Gruman, E., Melrose, D. B.
openaire   +3 more sources

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

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-candidate Selection Using a Generative Adversarial Network and ResNeXt

The Astrophysical Journal Supplement Series, 2022
Pulsar research has been a hot topic in the area of astronomy since they were first discovered. Pulsar discovery is fundamental for pulsar research. While pulsars are now visible across the electromagnetic spectrum, pulsar searches with modern radio ...
Qian Yin, Yefan Li, Jiajie Li, Xin Zheng, Ping Guo   +4 more
doaj   +1 more source

Coherent Emission Mechanisms in Radio Pulsars [PDF]

Astrophysics and Space Science, 1998
A theory of pulsar radio emission generation, in which the observed waves are produced directly by the maser-type plasma instabilities on the anomalous cyclotron-Cherenkov resonance $$\omega - \kappa _{ \shortparallel \nu \shortparallel } + \omega _B /\gamma _{res} = 0$$
openaire   +1 more source

The Benefit of Space Clocks for the Deep Space Network

Radio Science, Volume 60, Issue 8, August 2025.
Abstract Ground‐based atomic clocks have been the foundation of the Deep Space Network's (DSN's) ability to provide high‐precision tracking to deep space users for navigation and radio science since its inception in the mid‐1960s. This paper describes the development of space clocks that could aid the DSN and the solar system exploration enterprise ...
T. Ely, E. Burt, K. Cheung, R. Tjoelker
wiley   +1 more source

Superfluid turbulence and pulsar glitch statistics

, 2007
Experimental evidence is reviewed for the existence of superfluid turbulence in a differentially rotating, spherical shell at high Reynolds numbers ($\Rey\gsim 10^3$), such as the outer core of a neutron star.
A. Melatos, Amundsen L., C. Peralta, Gnedin O. Y., Hills R. N., Levenfish K. P., Melatos A., Shemar S. L.   +7 more
core   +1 more source

Improving efficiency in lung SAbR planning using integrated tools for X‐ray based adaptive radiotherapy

Journal of Applied Clinical Medical Physics, Volume 26, Issue 7, July 2025.
Abstract Purpose To evaluate the feasibility of translating clinical lung stereotactic ablative radiotherapy (SAbR) templates from Ethos1.1 to Ethos2.0, leveraging new features to facilitate dose fall‐off and automate patient‐specific beam arrangement.
Justin Visak, Brien Washington, Chien‐Yi Liao, Sean Domal, David Parsons, Yuanyuan Zhang, Shahed Badiyan, Kenneth Westover, Mu‐Han Lin   +8 more
wiley   +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

Deriving birth timing of roe deer fawns from body measurements to limit mowing mortality

Wildlife Biology, Volume 2025, Issue 4, July 2025.
Every spring, hiding roe deer fawns Capreolus capreolus in meadows are injured or killed by mowing activities. To assess the temporal overlap between mowing activities and the fawning period, and thus help reduce the risk of mowing death, we have determined the average parturition date in three regions of Bavaria, southern Germany.
Ferdinand Paul Stehr, Sophie Baur, Wibke Peters, Andreas König   +3 more
wiley   +1 more source