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Unveiling the First Black Holes With JWST: Multi-wavelength Spectral Predictions
Yale Univ, Dept Astron, POB 208101, New Haven, CT 06520 USA.;Yale Univ, Dept Phys, POB 208121, New Haven, CT 06520 USA.;Yale Ctr Astron & Astrophys, POB 208121, New Haven, CT 06520 USA..
Yale Univ, Dept Phys, POB 208121, New Haven, CT 06520 USA.;Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy..
Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy..
Yale Univ, Dept Astron, POB 208101, New Haven, CT 06520 USA..
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2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 838, no 2, 117Article in journal (Refereed) Published
Abstract [en]

Growing supermassive black holes (similar to 10(9) M-circle dot) that power luminous z > 6 quasars from light seeds-the remnants of the first stars-within a Gyr of the Big Bang poses a timing challenge. The formation of massive black hole seeds via direct collapse with initial masses similar to 10(4)-10(5) M-circle dot alleviates this problem. Viable direct-collapse black hole formation sites, the satellite halos of star-forming galaxies, merge and acquire stars to produce a new, transient class of high-redshift objects, obese black hole galaxies (OBGs). The accretion luminosity outshines that of the stars in OBGs. We predict the multi-wavelength energy output of OBGs and growing Pop III remnants at z = 9 for standard and slim disk accretion, as well as high and low metallicities of the associated stellar population. We derive robust selection criteria for OBGs-a pre-selection to eliminate blue sources, followed by color-color cuts ([F-090W-F-220W]> 0; -0.3<[F-200W-F-444W]< 0.3) and the ratio of X-ray flux to rest-frame optical flux (F-X/F-444W >> 1). Our cuts sift out OBGs from other bright, high-and low-redshift contaminants in the infrared. OBGs with predicted M-AB < 25 are unambiguously detectable by the Mid-Infrared Instrument (MIRI), on the upcoming James Webb Space Telescope (JWST). For parameters explored here, growing Pop III remnants with predicted M-AB < 30 will likely be undetectable by JWST. We demonstrate that JWST has the power to discriminate between initial seeding mechanisms.

Place, publisher, year, edition, pages
2017. Vol. 838, no 2, 117
Keyword [en]
cosmology: observations, dark ages, reionization, first stars, early universe, galaxies: photometry, quasars: supermassive black holes
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-321332DOI: 10.3847/1538-4357/aa6330ISI: 000398275400018OAI: oai:DiVA.org:uu-321332DiVA: diva2:1103860
Funder
Swedish Research Council
Available from: 2017-05-31 Created: 2017-05-31 Last updated: 2017-05-31Bibliographically approved

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