Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/218258
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dc.contributor.authorTakahashi, A.-
dc.contributor.authorMatsuoka, Y.-
dc.contributor.authorOnoue, M.-
dc.contributor.authorStrauss, M. A.-
dc.contributor.authorKashikawa, N.-
dc.contributor.authorToba, Y.-
dc.contributor.authorIwasawa, Kazushi-
dc.contributor.authorImanishi, M.-
dc.contributor.authorAkiyama, M.-
dc.contributor.authorKawaguchi, T.-
dc.contributor.authorNoboriguchi, A.-
dc.contributor.authorLee, C.-H.-
dc.date.accessioned2025-01-30T17:14:27Z-
dc.date.available2025-01-30T17:14:27Z-
dc.date.issued2024-
dc.identifier.issn0004-637X-
dc.identifier.urihttps://hdl.handle.net/2445/218258-
dc.description.abstractWe report the distribution of black hole (BH) masses and Eddingont ratios estimated for a sample of 131 low luminosity quasars in the early cosmic epoch (5.6 < z < 7.0). Our work is based on the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which has constructed a low luminosity quasar sample down to M1450 ∼ − 21 mag, exploiting the survey data of Hyper Suprime-Cam installed on Subaru Telescope. The discovery spectra of these quasars are limited to the rest-frame wavelengths of ∼1200–1400 Å, which contain no emission lines that can be used as BH mass estimators. In order to overcome this problem, we made use of low-z counterpart spectra from the Sloan Digital Sky Survey, which are spectrally matched to the high-z spectra in overlapping wavelengths. We then combined the C iv emission line widths of the counterparts with the continuum luminosity from the SHELLQs data to estimate BH masses. The resulting BH mass distribution has a range of ∼107–10M⊙, with most of the quasars having BH masses ∼108M⊙ with sub-Eddington accretion. The present study provides not only a new insight into normal quasars in the reionization epoch, but also a new promising way to estimate BH masses of high-z quasars without near-infrared spectroscopy.-
dc.format.extent1 p.-
dc.format.mimetypeapplication/pdf-
dc.language.isoeng-
dc.publisherInstitute of Physics (IOP)-
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.3847/1538-4357/ad045e-
dc.relation.ispartofAstrophysical Journal, 2024, vol. 960, num.112-
dc.relation.urihttps://doi.org/10.3847/1538-4357/ad045e-
dc.rights(c) American Astronomical Society, 2024-
dc.sourceArticles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))-
dc.subject.classificationForats negres (Astronomia)-
dc.subject.classificationGalàxies-
dc.subject.classificationQuàsars-
dc.subject.otherBlack holes (Astronomy)-
dc.subject.otherGalaxies-
dc.subject.otherQuasars-
dc.titleSubaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XVII. Black Hole Mass Distribution at z 6 Estimated via Spectral Comparison with Low-z Quasars-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec753805-
dc.date.updated2025-01-30T17:14:27Z-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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