Mapping the stellar population and gas excitation of MaNGA galaxies with megacubes. Results for AGN versus control sample

Author:

Riffel Rogério123ORCID,Mallmann Nicolas D12ORCID,Rembold Sandro B24,Ilha Gabriele S245ORCID,Riffel Rogemar A24ORCID,Storchi-Bergmann Thaisa12,Ruschel-Dutra Daniel6ORCID,Vazdekis Alexandre37ORCID,Martín-Navarro Ignacio37,Schimoia Jaderson S42,Ramos Almeida Cristina37ORCID,da Costa Luiz N2,Vila-Verde Glauber C2,Gatto Lara12

Affiliation:

1. Departamento de Astronomia, Instituto de Física, Universidade Federal do Rio Grande do Sul , CP 15051, 91501-970 Porto Alegre, RS , Brazil

2. Laboratório Interinstitucional de e-Astronomia - LIneA , Rua Gal. José Cristino 77 , Rio de Janeiro, RJ - 20921-400, Brazil

3. Instituto de Astrofísica de Canarias, Calle Vía Láctea s/n , E-38205 La Laguna, Tenerife , Spain

4. Departamento de Física, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria , 97105-900 Santa Maria, RS , Brazil

5. Universidade do Vale do Paraíba. Av. Shishima Hifumi , 2911, CEP: 12244-000 São José dos Campos, SP , Brazil

6. Departamento de Física, Universidade Federal de Santa Catarina , P.O. Box 476, 88040-900 Florianópolis, SC , Brazil

7. Departamento de Astrofísica, Universidad de La Laguna , E-38205 Tenerife , Spain

Abstract

ABSTRACT We present spaxel-by-spaxel stellar population fits for the ∼10 000 MaNGA data cubes. We provide multiple extension fits files, nominated as megacubes, with maps of several properties as well as emission-line profiles that are provided for each spaxel. All the megacubes are available through a web interface (https://manga.linea.org.br/ or http://www.if.ufrgs.br/~riffel/software/megacubes/). We also defined a final Active Galactic Nuclei (AGN) sample, as well as a control sample matching the AGN host galaxy properties. We have analysed the stellar populations and spatially resolved emission-line diagnostic diagrams of these AGNs and compared them with the control galaxies sample. We find that the relative fractions of young (t ≤56 Myr) and intermediate-age (100 Myr ≤t ≤ 2 Gyr) show predominantly a positive gradient for both AGNs and controls. The relative fraction of intermediate-age stellar population is higher in AGN hosts when compared to the control sample, and this difference becomes larger for higher [O iii] luminosity AGNs. We attribute this to the fact that extra gas is available in these more luminous sources and that it most likely originates from mass-loss from the intermediate-age stars. The spatially resolved diagnostic diagrams reveal that the AGN emission is concentrated in the inner 0.5 Re (effective radius) region of the galaxies, showing that the AGN classification is aperture dependent and that emission-line ratios have to be taken together with the H α equivalent width for proper activity classification. We present a composite ‘BPT+WHAN’ diagram that produces a more comprehensive mapping of the gas excitation.

Funder

European Regional Development Fund

MCIU

Conselho Nacional de Desenvolvimento Científico e Tecnológico

FAPERGS

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

FAPESP

MICINN

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. AGN feedback and star formation in the peculiar galaxy NGC 232: insights from VLT-MUSE observations;Monthly Notices of the Royal Astronomical Society;2023-11-27

2. Cosmic metallicity evolution of Active Galactic Nuclei: implications for optical diagnostic diagrams;Monthly Notices of the Royal Astronomical Society;2023-11-27

3. SDSS-IV MaNGA: the role of the environment in AGN triggering;Monthly Notices of the Royal Astronomical Society;2023-11-21

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