The brightest X-ray AGNs at redshift $3\lesssim z \lesssim 6$
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866909874070224896 |
|---|---|
| author | Heather, Cameron Chantavat, Teeraparb Chongchitnan, Siri Chainakun, Poemwai |
| author_facet | Heather, Cameron Chantavat, Teeraparb Chongchitnan, Siri Chainakun, Poemwai |
| contents | Given recent X-ray observations of high-redshift active galactic nuclei (AGNs), we consider whether the extreme luminosities of these AGNs are consistent with current semi-analytical models. In particular, we apply extreme-value statistics (EVS) to obtain predictions of extreme X-ray luminosities of AGNs in the redshift range $3\lesssim z\lesssim 6$. We apply this formalism using different X-ray luminosity functions and compare the predicted extreme luminosities to AGNs in the Stripe 82 X-ray catalogue. We find a general consistency between data and the EVS predictions although there is some tension with certain luminosity functions. We discuss possible extensions to this model, including extrapolating our results to even higher redshifts ($z\gtrsim10$) where AGNs have recently been observed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_02090 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The brightest X-ray AGNs at redshift $3\lesssim z \lesssim 6$ Heather, Cameron Chantavat, Teeraparb Chongchitnan, Siri Chainakun, Poemwai Astrophysics of Galaxies Given recent X-ray observations of high-redshift active galactic nuclei (AGNs), we consider whether the extreme luminosities of these AGNs are consistent with current semi-analytical models. In particular, we apply extreme-value statistics (EVS) to obtain predictions of extreme X-ray luminosities of AGNs in the redshift range $3\lesssim z\lesssim 6$. We apply this formalism using different X-ray luminosity functions and compare the predicted extreme luminosities to AGNs in the Stripe 82 X-ray catalogue. We find a general consistency between data and the EVS predictions although there is some tension with certain luminosity functions. We discuss possible extensions to this model, including extrapolating our results to even higher redshifts ($z\gtrsim10$) where AGNs have recently been observed. |
| title | The brightest X-ray AGNs at redshift $3\lesssim z \lesssim 6$ |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2503.02090 |