The Disk Plus (Failed) Wind System of 3C 47: A Story of Accretion Disks and Binary Black Holes
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866918153107275776 |
|---|---|
| author | Marziani, P. Mengistue, S. Terefe del Olmo, A. Povič, M. Perea, J. Komossa, S. Bon, E. Bon, N. Popovič, L. Č. Deconto-Machado, A. Marquez, I. Carballo, M. A. Martínez |
| author_facet | Marziani, P. Mengistue, S. Terefe del Olmo, A. Povič, M. Perea, J. Komossa, S. Bon, E. Bon, N. Popovič, L. Č. Deconto-Machado, A. Marquez, I. Carballo, M. A. Martínez |
| contents | [Abridged] Optically thick, geometrically thin accretion disks around supermassive black holes are thought to contribute to broad-line emission in type-1 active galactic nuclei (AGN). However, observed emission line profiles most often deviate from those expected from a rotating disk. This report examines the role of accretion disks in broad-line emission of Population B AGN characterized by relatively low accretion rates in which broad lines show large redward asymmetry both in H$β$ and Mg II$λ$ 2800. An unbiased comparison matching black hole mass and Eddington ratio suggests that the most powerful radio-loud quasars show the highest red-ward asymmetries in H$β$. These shifts can be accounted for by gravitational and transverse redshift effects, especially for black hole masses larger than $\approx$10$^{8.7}$ M$_\odot$. The analysis of the extremely jetted quasar 3C 47 adds another piece to the puzzle: not only are the low ionization profiles of 3C 47 well-described by a relativistic Keplerian accretion disk model, with line emission in the range 100 - 1,000 gravitational radii, but also the high-ionization line profiles can be understood as a combination of disk plus a failed wind contribution that is in turn hiding the disk emission. Constraints on radio properties and line profile variability suggest that 3C 47 might involve the presence of a second black hole with secondary-to-primary mass ratio $\sim$ 0.5. We conjecture that the double peakers - type-1 AGN with Balmer line profiles consistent with accretion disk emission - might have their emission truncated by the sweeping effect of a second black hole. In non-starving systems, the disk signal is plausibly masked by additional line emission, rendering the disk contribution harder to detect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_01972 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Disk Plus (Failed) Wind System of 3C 47: A Story of Accretion Disks and Binary Black Holes Marziani, P. Mengistue, S. Terefe del Olmo, A. Povič, M. Perea, J. Komossa, S. Bon, E. Bon, N. Popovič, L. Č. Deconto-Machado, A. Marquez, I. Carballo, M. A. Martínez Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics [Abridged] Optically thick, geometrically thin accretion disks around supermassive black holes are thought to contribute to broad-line emission in type-1 active galactic nuclei (AGN). However, observed emission line profiles most often deviate from those expected from a rotating disk. This report examines the role of accretion disks in broad-line emission of Population B AGN characterized by relatively low accretion rates in which broad lines show large redward asymmetry both in H$β$ and Mg II$λ$ 2800. An unbiased comparison matching black hole mass and Eddington ratio suggests that the most powerful radio-loud quasars show the highest red-ward asymmetries in H$β$. These shifts can be accounted for by gravitational and transverse redshift effects, especially for black hole masses larger than $\approx$10$^{8.7}$ M$_\odot$. The analysis of the extremely jetted quasar 3C 47 adds another piece to the puzzle: not only are the low ionization profiles of 3C 47 well-described by a relativistic Keplerian accretion disk model, with line emission in the range 100 - 1,000 gravitational radii, but also the high-ionization line profiles can be understood as a combination of disk plus a failed wind contribution that is in turn hiding the disk emission. Constraints on radio properties and line profile variability suggest that 3C 47 might involve the presence of a second black hole with secondary-to-primary mass ratio $\sim$ 0.5. We conjecture that the double peakers - type-1 AGN with Balmer line profiles consistent with accretion disk emission - might have their emission truncated by the sweeping effect of a second black hole. In non-starving systems, the disk signal is plausibly masked by additional line emission, rendering the disk contribution harder to detect. |
| title | The Disk Plus (Failed) Wind System of 3C 47: A Story of Accretion Disks and Binary Black Holes |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.01972 |