Results 41 to 50 of about 6,438 (185)

What can the braking indices tell us about pulsars' nature?

, 2006
As a result of observational difficulties, braking indices of only six rotation-powered pulsars are obtained with certainty, all of which are remarkably smaller than the value ($n=3$) expected for pure magnetodipole radiation model.
Allen, Allen, Alpar, Arons, Becker, Blandford, Camilo, Chen, Cheng, Contopoulos, Goldreich, Gonzalez, Harding, Helfand, Kramer, Lin, Link, Link, Livingstone, Livingstone, Livingstone, Livingstone, Lyne, Lyne, Lyne, Manchester, McLaughlin, Menou, Qiao, R.X. Xu, Ruderman, Sturrock, Usov, W.W. Zhu, Wu, Xu, Xu, Y.L. Yue, Zhou   +38 more
core   +1 more source

Magnetar-like X-ray Bursts from an Anomalous X-ray Pulsar [PDF]

, 2002
Anomalous X-ray Pulsars (AXPs) are a class of rare X-ray pulsars whose energy source has been perplexing for some 20 years. Unlike other, better understood X-ray pulsars, AXPs cannot be powered by rotation or by accretion from a binary companion, hence ...
A Tiengo, AI Ibrahim, BE Stern, BM Gaensler, C Kouveliotou, C Thompson, C Thompson, E Göǧüs¸, EV Gotthelf, FP Gavriil, GG Fahlman, GJ Fishman, J van Paradijs, K Jahoda, KA Arnaud, M Pivovaroff, P Chatterjee, PM Woods, QZ Liu, S Mereghetti, TE Strohmayer, VM Kaspi, VM Kaspi, VM Kaspi, WHG Lewin   +24 more
core   +2 more sources

Unveiling the Hidden Radiation: The Persistent Emission of PSR B0823+26 in Its Quiescent State

The Astrophysical Journal
In this study, we report on a detailed polarimetric single-pulse analysis of the radio emission from the pulsar B0823+26 (J0825+2637) during its quiescent state.
Zhigang Wen, Jianling Chen, Jianping Yuan, Na Wang, Wenming Yan, Wei Han, Zhen Wang, Xuefeng Duan, Liang Jing, Pengcheng He, Abdujappar Rusul, Hui Wang, Chengbing Lyu   +12 more
doaj   +1 more source

Magnetospheric return-current-heated atmospheres of rotation-powered millisecond pulsars [PDF]

Astronomy & Astrophysics, 2020
We computed accurate atmosphere models of rotation-powered millisecond pulsars in which the polar caps of a neutron star (NS) are externally heated by magnetospheric return currents. The external ram pressure, energy losses, and stopping depth of the penetrating charged particles were computed self-consistently with the atmosphere model, instead of ...
Tuomo Salmi, Valery F. Suleimanov, Joonas Nättilä, Juri Poutanen   +3 more
openaire   +2 more sources

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

Effects of Compton scattering on the neutron star radius constraints in rotation-powered millisecond pulsars

, 2019
The aim of this work is to study the possible effects and biases on the radius constraints for rotation-powered millisecond pulsars when using Thomson approximation to describe electron scattering in the atmosphere models, instead of using exact ...
Poutanen, J., Salmi, T., Suleimanov, V.
core   +1 more source

High-Energy Gamma-Ray Observations of Two Young, Energetic Radio Pulsars [PDF]

, 1999
We present results of Compton Gamma-Ray Observatory EGRET observations of the unidentified high-energy gamma-ray sources 2EG J1049-5847 (GEV J1047-5840, 3EG J1048-5840) and 2EG J1103-6106 (3EG J1102-6103).
Buccheri R., J. Mattox, J. R. Lackey, Johnston S., Johnston S., Kanbach G., Kanbach G., M. Bailes, Merck M., Qiao G. J., R. N. Manchester, R. Pace, Standish E. M., Stappers B. W., Strickman M. S., Sturner S. J., V. M. Kaspi, Zhang L.   +17 more
core   +3 more sources

Discovering Pulsars in Compact Binaries with a Hidden Markov Model

The Astrophysical Journal
Discovering radio pulsars in compact binaries, whose orbital periods P _b satisfy P _b ≲ 1 day, is computationally challenging, because the time-dependent pulse frequency f _p ( t ) is strongly Doppler modulated by the binary motion.
Joseph O’Leary, Liam Dunn, Andrew Melatos   +2 more
doaj   +1 more source

Axion-mediated Transport of Fast Radio Bursts Originating in Inner Magnetospheres of Magnetars

The Astrophysical Journal Letters, 2023
Among magnetar models of fast radio bursts (FRBs), there is ongoing debate about whether the site of coherent radio emission lies within or beyond the light cylinder. We propose a mechanism by which FRBs produced near the magnetar surface are transported
Anirudh Prabhu
doaj   +1 more source

Electron Density Structure Measurements With Scattered Intense Laser Beam

Contributions to Plasma Physics, Volume 65, Issue 10, November 2025.
ABSTRACT Short‐pulse intense lasers have the potential to model extreme astrophysical environments in laboratories. Although there are diagnostics for energetic electrons and ions resulting from laser‐plasma interactions, the diagnostics to measure velocity distribution functions at the interaction region of the laser and plasma are limited.
K. Sakai, K. Himeno, S. J. Tanaka, T. Asai, T. Minami, Y. Abe, F. Nikaido, K. Kuramoto, M. Kanasaki, H. Kiriyama, A. Kon, K. Kondo, N. Nakanii, W. Y. Woon, C. M. Chu, K. T. Wu, C. S. Jao, Y. L. Liu, T. A. Pikuz, H. Kohri, A. O. Tokiyasu, S. Isayama, H. S. Kumar, K. Tomita, Y. Fukuda, Y. Kuramitsu   +25 more
wiley   +1 more source