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- W2071736157 abstract "The results are reported of a narrow-band filter search for Ly-alpha companions to z more than 2.8 quasars. Three out of 10 radio-loud quasars are found to have candidate Ly-alpha companions, while no candidates are seen in seven optically selected quasars. Follow-up spectroscopy has confirmed two of the candidates, with one yet to be observed. All the companions lie close to the quasar and are consistent with being ionized by it. Imaging data in a line-free continuum band on the previously known companion to PKS 1614 + 051 are presented. Spectral energy distributions for this Ly-alpha companion, and for a second object lying between it and the quasar, are given, and discussed with comparison to flat-spectrum sources known in the literature. Both PKS 1614 + 051 and the three new systems show a striking similarity in sizes, luminosities, and morphologies with nebulosity seen around low-z quasars. It is argued that the apparent lack of evolution in the quasar nebulosity strongly favors a tidal interaction model. 36 refs." @default.
- W2071736157 created "2016-06-24" @default.
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- W2071736157 date "1991-02-01" @default.
- W2071736157 modified "2023-10-18" @default.
- W2071736157 title "Lyman-alpha companions to high-z quasars" @default.
- W2071736157 doi "https://doi.org/10.1086/169667" @default.
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