Mapping Stellar Population of Seyfert 2

The AGN influence

Authors

DOI:

https://doi.org/10.47456/Cad.Astro.v7nEspecial.53380

Keywords:

astrophysics, active galaxies, star formation

Abstract

We investigate the circumnuclear stellar populations of 12 Seyfert 2 galaxies selected from the Swift-BAT AGN Spectroscopic Survey based on their ultra-hard X-ray luminosity (14–195 keV). Using MUSE/VLT integral field spectroscopy and spectral synthesis, we spatially characterize the stellar populations in the central regions of the galaxies. Preliminary results indicate signatures of central stellar rejuvenation, with significant contributions from young and intermediate-age populations and the presence of radial metallicity gradients. Moderate correlations between stellar properties and AGN activity indicators suggest that both gas recycled by evolved stars and gas associated with recent star formation may contribute to supermassive black hole fueling. Given the exploratory nature of the sample, these results should be regarded as preliminary.

Author Biographies

  • Lais Marinho, Federal University of Rio Grande do Sul

    Lais Nery Marinho (lais.marinho@ufrgs.br) é doutoranda e mestra em Física pela UFRGS, e bacharel em Astrofísica pela UFS. Desenvolve pesquisa focada em populações estelares e feedback em AGNs, utilizando espectroscopia de campo integral (IFU) no óptico.

  • Rogério Riffel, Federal University of Rio Grande do Sul

    Rogério Riffel (riffel@ufrgs.br) é Professor Associado da UFRGS e membro afiliado da ABC. Atua em Astronomia Extragaláctica, investigando galáxias de núcleo ativo, processos físicos no gás ionizado, evolução de galáxias, espectroscopia no infravermelho próximo, distribuição espectral de energia e populações estelares.

References

[1] L. Burtscher, R. I. Davies, T. T. Shimizu, R. Riffel, D. J. Rosario, E. K. S. Hicks, M. Y. Lin, R. A. Riffel, M. Schartmann, A. Schnorr-Müller, T. Storchi-Bergmann, G. Orban de Xivry e S. Veilleux, LLAMA: Stellar populations in the nuclei of ultrahard X-ray-selected AGN and matched inactive galaxies, Astronomy and Astrophysics 654, A132 (2021).

[2] N. D. Mallmann, R. Riffel, T. StorchiBergmann, S. B. Rembold, R. A. Riffel, J. Schimoia, L. N. da Costa, V. Ávila-Reese, S. F. Sanchez, A. D. Machado, R. Cirolini, G. S. Ilha e J. C. d. Nascimento, The first 62 AGN observed with SDSS-IV MaNGA - II. Resolved stellar populations, Monthly Notices of the Royal Astronomical Society 478 (4), 5491 (2018).

[3] R. Riffel, L. G. Dahmer-Hahn, R. A. Riffel, T. Storchi-Bergmann, N. Z. Dametto, R. Davies, L. Burtscher, M. Bianchin, D. RuschelDutra, C. Ricci e D. J. Rosario, Gemini NIFS survey of feeding and feedback processes in nearby active galaxies - VI. Stellar populations, Monthly Notices of the Royal Astronomical Society 512 (3), 3906 (2022).

[4] R. I. Davies, F. Müller Sánchez, R. Genzel, L. J. Tacconi, E. K. S. Hicks, S. Friedrich e A. Sternberg, A Close Look at Star Formation around Active Galactic Nuclei, The Astrophysical Journal 671 (2), 1388 (2007).

[5] R. Riffel, N. D. Mallmann, S. B. Rembold, G. S. Ilha, R. A. Riffel, T. StorchiBergmann, D. Ruschel-Dutra, A. Vazdekis, I. Martín-Navarro, J. S. Schimoia, C. Ramos Almeida, L. N. da Costa, G. C. Vila-Verde e L. Gatto, Mapping the stellar population and gas excitation of MaNGA galaxies with MEGACUBES. Results for AGN versus control sample, Monthly Notices of the Royal Astronomical Society 524 (4), 5640 (2023).

[6] M. Koss, B. Trakhtenbrot, C. Ricci, I. Lamperti, K. Oh, S. Berney, K. Schawinski, M. Baloković, L. Baronchelli, D. M. Crenshaw, T. Fischer, N. Gehrels, F. Harrison, Y. Hashimoto, D. Hogg, K. Ichikawa, N. Masetti, R. Mushotzky, L. Sartori, D. Stern, E. Treister, Y. Ueda, S. Veilleux e L. Winter, BAT AGN Spectroscopic Survey. I. Spectral Measurements, Derived Quantities, and AGN Demographics, The Astrophysical Journal 850 (1), 74 (2017).

[7] R. Cid Fernandes, A. Mateus, L. Sodré, G. Stasińska e J. M. Gomes, Semi-empirical analysis of Sloan Digital Sky Survey galaxies - I. Spectral synthesis method, Monthly Notices of the Royal Astronomical Society 358 (2), 363 (2005).

[8] A. Vazdekis, P. Sánchez-Blázquez, J. FalcónBarroso, A. J. Cenarro, M. A. Beasley, N. Cardiel, J. Gorgas e R. F. Peletier, Evolutionary stellar population synthesis with MILES - I. The base models and a new line index system, Monthly Notices of the Royal Astronomical Society 404 (4), 1639 (2010).

[9] R. Riffel, M. G. Pastoriza, A. RodríguezArdila e C. Bonatto, Probing the nearinfrared stellar population of Seyfert galaxies, Monthly Notices of the Royal Astronomical Society 400 (1), 273 (2009).

[10] E. Choi, R. S. Somerville, J. P. Ostriker, M. Hirschmann e T. Naab, The Origins of Gas Accreted by Supermassive Black Holes: The Importance of Recycled Gas, The Astrophysical Journal 964 (1), 54 (2024).

[11] R. Riffel, L. G. Dahmer-Hahn, A. Vazdekis, R. Davies, D. Rosario, C. R. Almeida, A. Audibert, I. Martín-Navarro, L. P. Martins, A. Rodríguez-Ardila, R. A. Riffel, T. Storchi-Bergmann, M. Bertoldo-Coelho, M. Trevisan, E. Hicks, A. S. Müller, L. N. Marinho e S. Veilleux, Observational constraints on the stellar recycled gas in active galactic nuclei feeding, Monthly Notices of the Royal Astronomical Society 531 (1), 554 (2024).

Downloads

Published

2026-07-30

Issue

Vol. 7 No. Especial (2026): As Astrocientistas: III Encontro Brasileiro de Meninas e Mulheres da Astrofísica, Cosmologia e Gravitação

Section

Resumos de Pôsteres

License

Copyright (c) 2026 Lais Nery Marinho, Rogério Riffel

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
L. Marinho and R. Riffel, “Mapping Stellar Population of Seyfert 2: The AGN influence”, Cad. Astro., vol. 7, no. Especial, pp. 81–85, Jul. 2026, doi: 10.47456/Cad.Astro.v7nEspecial.53380.