Results 81 to 90 of about 5,319 (222)

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

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

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

Jets from radio pulsars

Vistas in Astronomy, 1997
The observational evidence for jets and phenomena arising from rotation powered radio pulsars is reviewed, including many recent and exciting discoveries at X-ray wavelengths. The well studied jets of the Crab pulsar are summarised, including recent results from the HST.
openaire   +2 more sources

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

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

The Study of Mode-switching Behavior of PSR J0614+2229 Using the Parkes Ultra–wide-bandwidth Receiver Observations

The Astrophysical Journal
In this paper we present a detailed single-pulse and polarization study of PSR J0614+2229 based on the archived data observed on 2019 August 15 (MJD 58710) and 2019 September 12 (MJD 58738) using the ultra−wide-bandwidth low-frequency receiver on the ...
Yanqing Cai, Shijun Dang, Rai Yuen, Lunhua Shang, Feifei Kou, Jianping Yuan, Lei Zhang, Zurong Zhou, Na Wang, Qingying Li, Zhigang Wen, Wenming Yan, Shuangqiang Wang, Shengnan Sun, Habtamu Menberu Tedila, Shuo Xiao, Xin Xu, Rushuang Zhao, Qijun Zhi, Aijun Dong, Bing Zhang, Wei Li, Yingying Ren, Yujia Liu   +23 more
doaj   +1 more source

Radio pulsar populations [PDF]

, 2010
The goal of this article is to summarize the current state of play in the field of radio pulsar statistics. Simply put, from the observed sample of objects from a variety of surveys with different telescopes, we wish to infer the properties of the underlying sample and to connect these with other astrophysical populations (for example supernova ...
openaire   +2 more sources

Are the infrared-faint radio sources pulsars?

, 2011
Infrared-faint radio sources (IFRS) are objects which are strong at radio wavelengths but undetected in sensitive Spitzer observations at infrared wavelengths.
Middelberg, E (15534098), Mao, MY (15524597), Norris, RP (15475670), Hobbs, G (15510425), Keith, M (15536609), Cameron, AD (15552008)   +5 more
core   +2 more sources

Investigation of Individual Pulse Emission Behaviors from Pulsar J1741–0840

The Astrophysical Journal
We have carried out a detailed study of individual pulse emission from the pulsar J1741−0840 (B1738−08) observed using the Parkes and Effelsberg radio telescopes at the L band.
Y. H. Xu, Z. G. Wen, J. P. Yuan, Z. Wang, X. F. Duan, Z. Wang, N. Wang, M. Wang, H. G. Wang, A. Rusul, L. F. Hao, W. Han   +11 more
doaj   +1 more source