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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2510.20806 |
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| _version_ | 1866915572321615872 |
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| author | Roco-Avilez, Paulina Alejandra Coziol, Roger Torres-Papaqui, Juan Pablo Cutiva-Alvarez, Karla Alejandra La Rotta-Wilches, María Fernanda Aguirre-Gutierrez, César David Sandoval-Esparza, Angélica Gabriela |
| author_facet | Roco-Avilez, Paulina Alejandra Coziol, Roger Torres-Papaqui, Juan Pablo Cutiva-Alvarez, Karla Alejandra La Rotta-Wilches, María Fernanda Aguirre-Gutierrez, César David Sandoval-Esparza, Angélica Gabriela |
| contents | This article presents the first part of a study aimed at testing the unification paradigm for AGN (UPAGN) using the SED reconstruction code X-CIGALE. Our method consists in obtaining a generic SED for a large sample of Seyfert 1 (Sy1; part 1), then applying this SED to Seyfert 2 (Sy2; Part~II), expecting that the only difference will be the line-of-sight (LOS) angle, $i$, relative to the polar axis of the torus of gas and dust obscuring the broad line regions (BLRs). Our sample is composed of 3,896 Type 1, Sy1 at low redshifts, $ z<0.4$, separated into four spectral subgroups depending on the presence or absence in their spectra of narrow emission lines, Sy1N/Sy1B, and AGN wind, Sy1Bw and Sy1Nw. The generic SED produced by X-CIGALE applies to 90\% of the Sy1 in our sample. It includes a clumpy torus with an AGN engine seen face-on ($i \sim 10^\circ \pm 5^\circ$). Our analysis not only supports the existence of a torus in Sy1, in good agreement with UPAGN, but also reveals new facts about the accretion of matter and AGN wind: 1- a sudden accretion of matter from the BLR to the accretion disk triggered the wind, 2- matter from the wind replenishes the torus, consistent with a gradual formation of this structure by recurrent AGN winds, and 3- Sy1Bw and Sy1Nw eventually evolve as AGN without wind, leaving behind a torus as evidence of a higher AGN activity in their past. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_20806 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Testing the AGN Paradigm, Part I: a generic SED for Seyfert 1 galaxies Roco-Avilez, Paulina Alejandra Coziol, Roger Torres-Papaqui, Juan Pablo Cutiva-Alvarez, Karla Alejandra La Rotta-Wilches, María Fernanda Aguirre-Gutierrez, César David Sandoval-Esparza, Angélica Gabriela Astrophysics of Galaxies This article presents the first part of a study aimed at testing the unification paradigm for AGN (UPAGN) using the SED reconstruction code X-CIGALE. Our method consists in obtaining a generic SED for a large sample of Seyfert 1 (Sy1; part 1), then applying this SED to Seyfert 2 (Sy2; Part~II), expecting that the only difference will be the line-of-sight (LOS) angle, $i$, relative to the polar axis of the torus of gas and dust obscuring the broad line regions (BLRs). Our sample is composed of 3,896 Type 1, Sy1 at low redshifts, $ z<0.4$, separated into four spectral subgroups depending on the presence or absence in their spectra of narrow emission lines, Sy1N/Sy1B, and AGN wind, Sy1Bw and Sy1Nw. The generic SED produced by X-CIGALE applies to 90\% of the Sy1 in our sample. It includes a clumpy torus with an AGN engine seen face-on ($i \sim 10^\circ \pm 5^\circ$). Our analysis not only supports the existence of a torus in Sy1, in good agreement with UPAGN, but also reveals new facts about the accretion of matter and AGN wind: 1- a sudden accretion of matter from the BLR to the accretion disk triggered the wind, 2- matter from the wind replenishes the torus, consistent with a gradual formation of this structure by recurrent AGN winds, and 3- Sy1Bw and Sy1Nw eventually evolve as AGN without wind, leaving behind a torus as evidence of a higher AGN activity in their past. |
| title | Testing the AGN Paradigm, Part I: a generic SED for Seyfert 1 galaxies |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2510.20806 |