SDSS J1619 with blue-shifted broad components in H$α$ and in [O~{\sc iii}] having similar line width and velocity shifts: a recoiling SMBH candidate?
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| Format: | Preprint |
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2023
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| _version_ | 1866916109624541184 |
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| author | Zhang, XueGuang |
| author_facet | Zhang, XueGuang |
| contents | In this Letter, we report a potential candidate of recoiling supermassive black hole (rSMBH) in SDSS J1619 based on similar velocity shifts and line widths of the blue-shifted broad components in H$α$ and [O~{\sc iii}] doublet. The measured line width ratio between blue-shifted broad H$α$ and broad [O~{\sc iii}] line is 1.06, if compared with common values around 5.12 for normal Type-1 AGN, indicating different properties of the blue-shifted broad components in SDSS J1619 from those of normal QSOs. The virial BH mass $M_{BHr}$ derived from the broad H$α$ is consistent with the mass expected from the M_{BH}-σrelation. The similar velocity shifts and line widths of the blue-shifted broad components in H$α$ and [O~{\sc iii}] and the virial BH mass derived from the H$α$ broad line emissions that is consistent with the mass expected from the M_{BH}-σ~ relation, can be explained by a rSMBH scenario. Besides the rSMBH scenario, either the similar line widths of the blue-shifted broad components in H$α$ and in [O~{\sc iii}] or the consistency between the virial BH mass and the mass expected from the M_{BH}-σ~ relation cannot be explained by the other proposed models in SDSS J1619. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2310_13963 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | SDSS J1619 with blue-shifted broad components in H$α$ and in [O~{\sc iii}] having similar line width and velocity shifts: a recoiling SMBH candidate? Zhang, XueGuang Astrophysics of Galaxies In this Letter, we report a potential candidate of recoiling supermassive black hole (rSMBH) in SDSS J1619 based on similar velocity shifts and line widths of the blue-shifted broad components in H$α$ and [O~{\sc iii}] doublet. The measured line width ratio between blue-shifted broad H$α$ and broad [O~{\sc iii}] line is 1.06, if compared with common values around 5.12 for normal Type-1 AGN, indicating different properties of the blue-shifted broad components in SDSS J1619 from those of normal QSOs. The virial BH mass $M_{BHr}$ derived from the broad H$α$ is consistent with the mass expected from the M_{BH}-σrelation. The similar velocity shifts and line widths of the blue-shifted broad components in H$α$ and [O~{\sc iii}] and the virial BH mass derived from the H$α$ broad line emissions that is consistent with the mass expected from the M_{BH}-σ~ relation, can be explained by a rSMBH scenario. Besides the rSMBH scenario, either the similar line widths of the blue-shifted broad components in H$α$ and in [O~{\sc iii}] or the consistency between the virial BH mass and the mass expected from the M_{BH}-σ~ relation cannot be explained by the other proposed models in SDSS J1619. |
| title | SDSS J1619 with blue-shifted broad components in H$α$ and in [O~{\sc iii}] having similar line width and velocity shifts: a recoiling SMBH candidate? |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2310.13963 |