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Further <i>N</i>-Frame networking dynamics of conscious observer-self agents via a functional contextual interface: predictive coding, double-slit quantum mechanical experiment, and decision-making fallacy modeling as applied to the measurement problem in humans and AI. [PDF]
Front Comput NeurosciEdwards DJ.
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Primordial black holes and their gravitational-wave signatures. [PDF]
Living Rev RelativBagui E +20 more
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VLA Observations of the Double Quasar 0957+561: Gravitational Double Image or Binary Quasar?
Symposium - International Astronomical Union, 1980The radio source 0957+561 was identified by Walsh et al. (1979, Nature 279, pp.381–384) with a pair of quasars, 6.1 apart on the sky, whose optical emission and absorption spectra are nearly identical. Walsh et al. suggested a gravitational lens interpretation in which a single object is split into two images by an intervening massive object. Using the
D. H. Roberts +2 more
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Radio structure of the ‘double quasar’ 4C11.50
Nature, 1974WAMPLER et al.1 have recently announced the discovery of a close pair of optical quasars associated with the radio source 4C11.50. The brighter quasar (a) has a redshift of 0.436, whereas its companion (b), 4.8 arc s away in position angle 95°, has a much larger redshift of 1.901.
D. STANNARD +3 more
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Quasar image doubling associated with absorption systems
Nature, 1979Ever since their discovery the origin of quasar absorption lines has been a subject of considerable controversy (see ref. 1). In this note we consider the consequences of the hypothesis that at least some of the absorption lines arise in galaxies. These galaxies could be ordinary ones with 50–100 kpc haloes2, or perhaps more compact but more common (at
Julian H. Krolik, John Kwan
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A Cosmic Double Helix in the Archetypical Quasar 3C273
Science, 2001Finding direct evidence for plasma instability in extragalactic jets is crucial for understanding the nature of relativistic outflows from active galactic nuclei. Our radio interferometric observations of the quasar 3C273 made with the orbiting radio telescope, HALCA, and an array of ground telescopes have yielded an image in which the emission across ...
A P, Lobanov, J A, Zensus
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Superluminal motion in the double-lobed quasar 3C263
Nature, 1987The detection of superluminal motion in the quasar 3C263 is reported. The milliarcsecond structure of this source consists of two nearly unresolved components whose separation is increasing at a rate of 0.06 + or - 0.02 marcsec/yr. This corresponds to an expansion speed of 2.7 + or - 0.9 c (H/0/ = 55 km/s/Mpc, q/0/ = 0.05).
J. A. Zensus, D. H. Hough, R. W. Porcas
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“Double quasar” could be gravity effect
Physics Today, 1979Earlier this year observations of a close pair of visible astronomical sources previously identified with a quasar candidate from low-resolution radio data appeared to indicate that the pair is actually a single object doubled by the effect of a “gravitational lens.” More recent radio observations make some difficulties for the hypothesis, but do not ...
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Ton 155 and 156: a Double Quasar?
Nature Physical Science, 1972Janes and Lynds1 have shown that Ton 156 is a quasar, although they were unable to determine a satisfactory redshift. My spectroscopic observations made with the Mauna Kea 224 cm telescope, have shown that Ton 155, located at about 35″ arc north preceding Ton 156, is also a quasar and have allowed redshifts to be determined for both objects.
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