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Study of the Stellar Populations in AGN

Published online by Cambridge University Press:  10 November 2010

G. Tenorio-Tagle
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife
M. Serote-Roos
Affiliation:
DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal
C. Boisson
Affiliation:
DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal
M. Joly
Affiliation:
DAEC, Observatoire de Meudon, 92195 Meudon, France
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Summary

We present here preliminary results of a study of the stellar population in AGN. Our aim is to quantify the stellar population within the nuclear regions by means of spectroscopic observations and to determine whether the central activity influences the stellar population or vice versa. The results will have general relevance to understanding the evolution of galaxies and the energy generation within the nucleus.

Introduction

We have observed 30 galaxies, of different levels of activity, using long-slit spectroscopy at the CFHT, in the range 5000–10000 Å (including MgI, NaI, TiO, CN and CallT).

In order to determine the composite stellar population of a galaxy, it is necessary to obtain spectroscopy of several different wavelength regions, including a number of different absorption lines. Without such information it is not possible to disentangle the effects of abundance variation, luminosity class and stellar type.

We are able to detect radial gradients in the stellar distribution (if any), as well as the possible dilution in the nucleus of the stellar component by a featureless component. We shall then establish at what wavelengths and to what degree the stellar population is responsible for the observed activity.

Results and Conclusions

Preliminary results for NGC 3516 (type 1 Seyfert, SB0/a), Mkn 620 (type 2 Seyfert, S(B)a) and NGC 3379 (non-active galaxy, E0) are presented.

Type
Chapter
Information
Violent Star Formation
From 30 Doradus to QSOs
, pp. 403 - 404
Publisher: Cambridge University Press
Print publication year: 1994

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  • Study of the Stellar Populations in AGN
    • By M. Serote-Roos, DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal, C. Boisson, DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal, M. Joly, DAEC, Observatoire de Meudon, 92195 Meudon, France
  • G. Tenorio-Tagle, Instituto de Astrofísica de Canarias, Tenerife
  • Book: Violent Star Formation
  • Online publication: 10 November 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600159.070
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  • Study of the Stellar Populations in AGN
    • By M. Serote-Roos, DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal, C. Boisson, DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal, M. Joly, DAEC, Observatoire de Meudon, 92195 Meudon, France
  • G. Tenorio-Tagle, Instituto de Astrofísica de Canarias, Tenerife
  • Book: Violent Star Formation
  • Online publication: 10 November 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600159.070
Available formats
×

Send book to Google Drive

To send content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive.

  • Study of the Stellar Populations in AGN
    • By M. Serote-Roos, DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal, C. Boisson, DAEC, Observatoire de Meudon, 92195 Meudon, France; Centro de Astrofisica da Universidade do Porto, Rua do Campo Alegre 823, 4100 Porto, Portugal, M. Joly, DAEC, Observatoire de Meudon, 92195 Meudon, France
  • G. Tenorio-Tagle, Instituto de Astrofísica de Canarias, Tenerife
  • Book: Violent Star Formation
  • Online publication: 10 November 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600159.070
Available formats
×