Results 81 to 90 of about 31,557 (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

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

Search for spatial coincidence between IceCube neutrinos and radio pulsars [PDF]

, 2022
Vibhavasu Pasumarti, S. Desai
openalex   +1 more source

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +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 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

Recovery of Linear and Nonlinear Heart Rate Variability Metrics After Short‐Term Moderate versus Vigorous Intensity Exercise: A Cross‐Sectional Randomized Cross‐Over Study

European Journal of Sport Science, Volume 25, Issue 11, November 2025.
ABSTRACT The present study explored acute responses of heart rate (HR) variability (HRV) metrics, incorporating the nonlinear index alpha 1 of detrended fluctuation analysis (DFAa1) during passive recovery, providing information about correlation properties of HR time series during the regulation of recovery processes. Recreationally active female (n = 
Thomas Gronwald, Hannes Kock, Lisa Röglin, Martin Möhle, Eva Kircher, Olaf Hoos, Sascha Ketelhut   +6 more
wiley   +1 more source

Unveiling the Emission Properties of Three Long-period Pulsars Using FAST

The Astrophysical Journal Supplement Series
We detail the emission behaviors of three long-period pulsars detected using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) during the Commensal Radio Astronomy FAST survey.
H. M. Tedila, D. Li, P. Wang, R. Yuen, J. P. Yuan, N. Wang, Z. G. Wen, S. J. Dang, A. G. Tegegne, R. Rejep, C. C. Miao, (FAST Collaboration)   +11 more
doaj   +1 more source

MeV Pulsars: Modeling Spectra and Polarization

, 2017
A sub-population of energetic rotation-powered pulsars show high fluxes of pulsed non-thermal hard X-ray emission. While this MeV pulsar population includes some radio-loud pulsars like the Crab, a significant number have no detected radio or GeV ...
Harding, Alice K., Kalapotharakos, Constantinos   +1 more
core   +1 more source