Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/34543
Titolo: | The universal shape of the X-ray variability power spectrum of AGN up to z~3 | Autori: | PAOLILLO, Maurizio Papadakis, I. E. Brandt, W. N. Bauer, F. E. LANZUISI, Giorgio ALLEVATO, Viola Shemmer, O. Zheng, X. C. De Cicco, D. GILLI, Roberto Luo, Bin Thomas, M. TOZZI, Paolo VITO, Fabio Xue, Y. Q. |
Data pubblicazione: | 2023 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 673 | Da pagina:: | A68 | Abstract: | We study the ensemble X-ray variability properties of Active Galactic Nuclei (AGN) over a large range of timescales (20 ks $\leq T\leq$ 14 yrs), redshift ($0\leq z \lesssim 3$), luminosities ($10^{40}$ erg s$^{-1}\leq L_X\leq 10^{46}$ erg s$^{-1}$) and black hole (BH) masses ($10^6 \leq $M$_\odot \leq 10^9$). We propose the use of the variance-frequency diagram, as a viable alternative to the study of the power spectral density (PSD), which is not yet accessible for distant, faint and/or sparsely sampled AGN. We show that the data collected from archival observations and previous literature studies are fully consistent with a universal PSD form which does not show any evidence for systematic evolution of shape or amplitude with redshift or luminosity, even if there may be differences between individual AGN at a given redshift or luminosity. We find new evidence that the PSD bend frequency depends on BH mass and, possibly, on accretion rate. We finally discuss the implications for current and future AGN population and cosmological studies. | URI: | http://hdl.handle.net/20.500.12386/34543 | URL: | https://www.aanda.org/articles/aa/full_html/2023/05/aa45291-22/aa45291-22.html http://arxiv.org/abs/2302.08524v1 https://ui.adsabs.harvard.edu/abs/2023A%26A...673A..68P/abstract |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/202245291 | Bibcode ADS: | 2023A&A...673A..68P | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
aa45291-22.pdf | Pdf editoriale | 572.1 kB | Adobe PDF | Visualizza/apri |
Page view(s)
13
controllato il 13-mag-2024
Download(s)
3
controllato il 13-mag-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.