Probing Large-scale Coherence between Spitzer IR and Chandra X-Ray Source-subtracted Cosmic Backgrounds

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dc.contributor.authorCappelluti, N.
dc.contributor.authorArendt, Richard
dc.contributor.authorKashlinsky, A.
dc.contributor.authorLi, Y.
dc.contributor.authorHasinger, G.
dc.contributor.authorHelgason, K.
dc.contributor.authorUrry, M.
dc.contributor.authorNatarajan, P.
dc.contributor.authorFinoguenov, A.
dc.date.accessioned2022-06-08T15:39:01Z
dc.date.available2022-06-08T15:39:01Z
dc.date.issued2017-09-21
dc.description.abstractWe present new measurements of the large-scale clustering component of the cross-power spectra of the source-subtracted Spitzer-IRAC cosmic infrared background and Chandra-ACIS cosmic X-ray background surface brightness fluctuations Our investigation uses data from the Chandra Deep Field South, Hubble Deep Field North, Extended Groth Strip/AEGIS field, and UDS/SXDF surveys, comprising 1160 Spitzer hours and ∼12 Ms of Chandra data collected over a total area of 0.3 deg2. We report the first (>5σ) detection of a cross-power signal on large angular scales >20'' between [0.5–2] keV and the 3.6 and 4.5 μm bands, at ∼5σ and 6.3σ significance, respectively. The correlation with harder X-ray bands is marginally significant. Comparing the new observations with existing models for the contribution of the known unmasked source population at z < 7, we find an excess of about an order of magnitude at 5σ confidence. We discuss possible interpretations for the origin of this excess in terms of the contribution from accreting early black holes (BHs), including both direct collapse BHs and primordial BHs, as well as from scattering in the interstellar medium and intra-halo light.en_US
dc.description.sponsorshipN.C. thanks Yale University for the YCAA Prize Postdoctoral Fellowship. We acknowledge NASA ADAP grant NNX16AF29G, Chandra SAO grant AR6-17017B, Chandra SAO grant GO5-16150A, and NASA/12-EUCLID11-0003.en_US
dc.description.urihttps://iopscience.iop.org/article/10.3847/2041-8213/aa8acden_US
dc.format.extent7 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2m2fr-ik3f
dc.identifier.citationCappelluti. N. et al. Probing Large-scale Coherence between Spitzer IR and Chandra X-Ray Source-subtracted Cosmic Backgrounds. The Astrophysical Journal Letters 847 (Sept. 21, 2017), no 1. https://doi.org/10.3847/2041-8213/aa8acden_US
dc.identifier.urihttps://doi.org/10.3847/2041-8213/aa8acd
dc.identifier.urihttp://hdl.handle.net/11603/24851
dc.language.isoen_USen_US
dc.publisherIOP Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.en_US
dc.titleProbing Large-scale Coherence between Spitzer IR and Chandra X-Ray Source-subtracted Cosmic Backgroundsen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-8403-8548en_US

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