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https://hdl.handle.net/2445/218258
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DC Field | Value | Language |
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dc.contributor.author | Takahashi, A. | - |
dc.contributor.author | Matsuoka, Y. | - |
dc.contributor.author | Onoue, M. | - |
dc.contributor.author | Strauss, M. A. | - |
dc.contributor.author | Kashikawa, N. | - |
dc.contributor.author | Toba, Y. | - |
dc.contributor.author | Iwasawa, Kazushi | - |
dc.contributor.author | Imanishi, M. | - |
dc.contributor.author | Akiyama, M. | - |
dc.contributor.author | Kawaguchi, T. | - |
dc.contributor.author | Noboriguchi, A. | - |
dc.contributor.author | Lee, C.-H. | - |
dc.date.accessioned | 2025-01-30T17:14:27Z | - |
dc.date.available | 2025-01-30T17:14:27Z | - |
dc.date.issued | 2024 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | https://hdl.handle.net/2445/218258 | - |
dc.description.abstract | We 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.extent | 1 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Institute of Physics (IOP) | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.3847/1538-4357/ad045e | - |
dc.relation.ispartof | Astrophysical Journal, 2024, vol. 960, num.112 | - |
dc.relation.uri | https://doi.org/10.3847/1538-4357/ad045e | - |
dc.rights | (c) American Astronomical Society, 2024 | - |
dc.source | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) | - |
dc.subject.classification | Forats negres (Astronomia) | - |
dc.subject.classification | Galàxies | - |
dc.subject.classification | Quàsars | - |
dc.subject.other | Black holes (Astronomy) | - |
dc.subject.other | Galaxies | - |
dc.subject.other | Quasars | - |
dc.title | Subaru 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.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 753805 | - |
dc.date.updated | 2025-01-30T17:14:27Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
Files in This Item:
File | Description | Size | Format | |
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877190.pdf | 2.99 MB | Adobe PDF | View/Open |
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