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http://hdl.handle.net/2289/8083| Title: | Far-IR emission from bright high-redshift quasars |
| Authors: | Vasiliev, Evgenii O. Shchekinov, Yuri A. Nath, Biman B. |
| Issue Date: | 3-Mar-2023 |
| Publisher: | De Gruyter |
| Citation: | Open Astronomy, 2023, Vol. 32, p20220218 |
| Abstract: | The majority of quasars detected at high redshifts ( z≳6 ) strongly emit ultraviolet radiation with absolute magnitudes at rest-frame M1450Å,AB∼−(29–27) . Some of them have high luminosities in [CII] 158μm line and in far-infrared (FIR) continuum, which leads to the expectation of a large amount of much cold dusty gas in these quasars. We have studied the relation between luminosities in the [CII] 158μm and the FIR continuum for a slightly absorbed supermassive black hole (SMBH) obscured by an ensemble of dense clouds with a low covering factor. We have found that dense clouds with a low covering factor can give sufficient luminosities in [CII] 158μm line and the underlying FIR continuum to reproduce the [CII]-FIR ratio observed in high-redshift quasars for a reasonable SMBH mass of M∙∼109M⊙ . We note that many distant mildly/heavily obscured active galactic nuclei are to avoid detection in near-infrared (IR) wavelengths; if this is the case, blind IR/FIR surveys are needed. |
| Description: | Open Access |
| URI: | http://hdl.handle.net/2289/8083 |
| ISSN: | 2543-6376 |
| Alternative Location: | https://doi.org/10.1515/astro-2022-0218 |
| Copyright: | 2023 The Author(s) |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2023_Open_Astronomy_Vol.32_p20220218.pdf Restricted Access | Open Access | 2.18 MB | Adobe PDF | View/Open Request a copy |
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