Journal ArticleDOI
Observation of a Rapidly Pulsating Radio Source
TLDR
In this article, the first report of a curious class of astronomical radio sources, distinguished by their rapid and extremely regular pulsations, was made by Hewish et al. They are now understood to be rapidly rotating, magnetized neutron stars, or pulsars.Abstract:
Unusual signals from pulsating radio sources have been recorded at the Mullard Radio Astronomy Observatory The radiation seems to come from local objects within the galaxy, and may be associated with oscillations of white dwarf or neutron stars 1968 saw the first report of a curious class of astronomical radio sources, distinguished by their rapid and extremely regular pulsations Hewish et al associated them with unusually stable oscillations in compact stars They are now understood to be rapidly rotating, magnetized neutron stars, or pulsarsread more
Citations
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Journal ArticleDOI
A perfect fluid model for neutron stars
Gabino Estevez-Delgado,Joaquin Estevez-Delgado,Nadiezhda Montelongo Garcia,Modesto Pineda Duran +3 more
TL;DR: In this article, a physically acceptable internal solution with a perfect fluid, which needs the pressure and density as regular, positive and monotonic decreasing functions and with a speci cally optimal density, is presented.
Journal ArticleDOI
Pulsars detection by machine learning with very few features
Haitao Lin,Xiangru Li,Ziying Luo +2 more
TL;DR: The experimental results verify the effectiveness and efficiency of the proposed feature selection algorithms and investigate the number of features required as well as the misclassified pulsar candidates classification by the models.
Journal ArticleDOI
The High Time and Frequency Resolution Capabilities of the Murchison Widefield Array
S. E. Tremblay,Stephen M. Ord,N. D. R. Bhat,Steven Tingay,Brian Crosse,D. Pallot,S. I. Oronsaye,Gianni Bernardi,Judd D. Bowman,Frank H. Briggs,Roger J. Cappallo,B. E. Corey,Avinash A. Deshpande,David Emrich,R. Goeke,Lincoln J. Greenhill,Bryna J. Hazelton,Melanie Johnston-Hollitt,David L. Kaplan,Justin C. Kasper,E. Kratzenberg,Colin J. Lonsdale,Mervyn J. Lynch,S. R. McWhirter,Daniel A. Mitchell,Miguel F. Morales,Edward T. Morgan,Divya Oberoi,T. Prabu,Alan E. E. Rogers,A. Roshi,N. Udaya Shankar,K. S. Srivani,Ravi Subrahmanyan,Mark Waterson,Randall B. Wayth,Rachel L. Webster,A. R. Whitney,Andrew Williams,Christopher L. Williams +39 more
TL;DR: In this article, the authors describe the system that records the 100 micro-second and 10 kHz resolution voltage data from the Murchison Widefield Array (MWA) and demonstrate that this capability is critical for science applications.
Journal ArticleDOI
Relativistic Gravothermal Instabilities
TL;DR: In this article, the Tolman-Ehrenfest effect is considered in the case of static, spherically symmetric configurations in General Relativity, and the authors show that stable static configurations exist only in between two marginal radii for any fixed energy with negative thermal plus gravitational energy.
Journal ArticleDOI
Constraining the Evolutionary Fate of Central Compact Objects: "Old" Radio Pulsars in Supernova Remnants
TL;DR: In this paper, the authors present an X-ray survey of all ordinary radio pulsars within 6 kpc that are positionally coincident with Galactic SNRs in order to test the possible connection between the supposedly old, but possibly very young pulsars, and the SNRs.
References
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Interplanetary Scintillation of Small Diameter Radio Sources
TL;DR: In this article, the authors used the black-body equations to calculate the increased radiation appropriate to the observed brightness increase in the star over a 1,000 A.u. band-width at 5,400 A.U.
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Normal modes of radial pulsation of stars at the end point of thermonuclear evolution
David W. Meltzer,Kip S. Thorne +1 more
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Energetic Particles from the Sun
C. E. Fichtel,F. B. Mcdonald +1 more
TL;DR: In this article, the authors discuss the association of solar cosmic rays with flare association, solar particle acceleration, recurrence and low energy solar particle events, and discuss the effects of solar particle particle acceleration.
Journal ArticleDOI
Possible magnetospheric phenomena associated with neutron stars
TL;DR: In this paper, it was shown that the importance of the early cooling by emission of neutrinos from the Urca process has been underestimated in the foregoing investigations, and the calculations of Miss Tsuruta indicate that a neutron star will rapidly cool to 3 or 4 × 106 °K, but that after 105 years its surface temperature will still be about 2 × 106°K.