遇见数据集

A new population of FRIIsquestionMark

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ESA Earth Online2026-06-22 收录
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Unification scenarios explain various flavors of radio galaxies and quasars withorientationdependent obscuration effects. Type2 FRII galaxies contain a quasarseen through a dusty molecular torus aligned with the radio jet. However, thereexist a population of FRIIs, found with Spitzer, that does not fit into thisscheme. These FRIIs exhbit highexcitation nuclear optical emission lines, butweak 15um luminosities. One possibility is very large obscuration;alternatively, they may be a genuinely different population. XMM spectroscopyand Chandra imaging will discriminate between the two scenarios. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]

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