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Unveiling the nuclear region of NGC 6868: Mapping the stellar population and ionized gas

Published online by Cambridge University Press:  29 March 2021

João P. V. Benedetti Open the ORCID record for João P. V. Benedetti [Opens in a new window] ,
Rogério Riffel ,
Tiago V. Ricci Open the ORCID record for Tiago V. Ricci [Opens in a new window] ,
João E. Steiner ,
Rogemar A. Riffel ,
Miriani G. Pastoriza ,
Daniel Ruschel-Dutra  and
Juliana C. Motter Open the ORCID record for Juliana C. Motter [Opens in a new window]
João P. V. Benedetti
Affiliation:
Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil email: jpvbene@gmail.com
Rogério Riffel
Affiliation:
Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil email: jpvbene@gmail.com
Tiago V. Ricci
Affiliation:
Universidade Federal da Fronteira Sul, Campus Cerro Largo, 97900-000, Cerro Largo, RS, Brazil
João E. Steiner
Affiliation:
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, 05508-900, São Paulo, Brazil
Rogemar A. Riffel
Affiliation:
Departamento de Física, Universidade Federal de Santa Maria 97105-900, Santa Maria, RS, Brazil
Miriani G. Pastoriza
Affiliation:
Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil email: jpvbene@gmail.com
Daniel Ruschel-Dutra
Affiliation:
Departamento de Física, Universidade Federal de Santa Catarina 88040-900, Florianópolis, SC, Brazil
Juliana C. Motter
Affiliation:
Departamento de Astronomia, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil email: jpvbene@gmail.com
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Abstract

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We mapped the stellar population and emission gas properties in the nuclear region of NGC 6868 using datacubes extracted with Gemini Multi-Object Spectrograph (GMOS) in the Integral Field Unit (IFU) mode. To obtain the star-formation history of this galaxy we used the starlight code together with the new generation of MILES simple stellar population models. The stellar population dominating (95% in light fraction) the central region of NGC 6868 is old and metal rich (~10 Gyr, 2.2 Z⊙). We also derived the kinematics and emission line fluxes of ionized gas with the IFSCube package. A rotation disk is clearly detected in the nuclear region of the galaxy and no broad components were detected. Also, there is a region where the emission lines disappear almost completely, probably due to diffuse ionized gas component. Channel maps, diagnostic diagrams and stellar kinematics are still under analysis.

Keywords

galaxies: individual (NGC 6868)galaxies: kinematics and dynamicsgalaxies: stellar content
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 418 - 420
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

References

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