SPHEREx data confirm 77 new luminous heavily reddened quasars at 1.5<z<3.9 that are hot-dust poor relative to unobscured quasars, supporting a blow-out feedback phase.
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The paper advocates for boosting HST's orbit to enable unique UV emission-line imaging of the circumgalactic medium, delivering the first statistical constraints on warm-hot gas and aiding target selection for the future Habitable Worlds Observatory.
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Hidden Monsters with SPHEREx I: A goldmine for heavily reddened quasars at cosmic noon
SPHEREx data confirm 77 new luminous heavily reddened quasars at 1.5<z<3.9 that are hot-dust poor relative to unobscured quasars, supporting a blow-out feedback phase.