Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/268521 |
Resumo: | For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of the electron temperature. Narrow emission-line intensities from the Sloan Digital Sky Survey (SDSS) Data Release 17 (DR17) [in the wavelength range 3000 < λ(Å) < 9100] and from the literature for a sample of 45 nearby (z < 0.08) Sy 2s were considered. Our direct estimates indicate that Sy 2s have similar temperatures in the gas region where most of the S+ ions are located in comparison with that of star-forming regions (SFs). However, Sy 2s present higher temperature values (∼10000 K) in the region where most of the S²⁺ ions are located relative to that of SFs. We derive the total sulphur abundance in the range of 6.2 ≲ 12+log(S/H) ≲ 7.5, corresponding to 0.1–1.8 times the solar value. These sulphur abundance values are lower by ∼0.4 dex than those derived in SFs with similar metallicity, indicating a distinct chemical enrichment of the interstellar medium (ISM) for these object classes. The sulphur abundance relative to oxygen (S/O) values for our Sy 2 sample present an abrupt (∼0.5 dex) decrease with increasing oxygen abundance relative to hydrogen (O/H) for the high-metallicity regime [12 + log(O/H) ≳ 8.7)], what is not seen for the SFs. However, when our Sy 2 estimates are combined with those from a large sample of SFs, we did not find any dependence between S/O and O/H. |
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Dors Júnior, Oli LuizValerdi, MabelRiffel, Rogemar AndréRiffel, RogérioCardaci, Mónica V.Hägelle, Guillermo FedericoArmah, MarkRevalski, MitchellFlury, SophiaFreitas-Lemes, PriscilaAmôres, Eduardo Brescansin deKrabbe, Angela CristinaBinette, LucFeltre, AnnaStorchi-Bergmann, Thaisa2023-12-16T03:26:45Z20230035-8711http://hdl.handle.net/10183/268521001168844For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of the electron temperature. Narrow emission-line intensities from the Sloan Digital Sky Survey (SDSS) Data Release 17 (DR17) [in the wavelength range 3000 < λ(Å) < 9100] and from the literature for a sample of 45 nearby (z < 0.08) Sy 2s were considered. Our direct estimates indicate that Sy 2s have similar temperatures in the gas region where most of the S+ ions are located in comparison with that of star-forming regions (SFs). However, Sy 2s present higher temperature values (∼10000 K) in the region where most of the S²⁺ ions are located relative to that of SFs. We derive the total sulphur abundance in the range of 6.2 ≲ 12+log(S/H) ≲ 7.5, corresponding to 0.1–1.8 times the solar value. These sulphur abundance values are lower by ∼0.4 dex than those derived in SFs with similar metallicity, indicating a distinct chemical enrichment of the interstellar medium (ISM) for these object classes. The sulphur abundance relative to oxygen (S/O) values for our Sy 2 sample present an abrupt (∼0.5 dex) decrease with increasing oxygen abundance relative to hydrogen (O/H) for the high-metallicity regime [12 + log(O/H) ≳ 8.7)], what is not seen for the SFs. However, when our Sy 2 estimates are combined with those from a large sample of SFs, we did not find any dependence between S/O and O/H.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 521, no. 2 (May 2023), p. 1969–1987Galáxias ativasEvolucao galaticaFormacao de galaxiasMeio interestelarGalaxias seyfertISM : AbundancesGalaxies : AbundancesGalaxies : ActiveGalaxies : EvolutionGalaxies : NucleiGalaxies : ISMGalaxies : SeyfertChemical abundances in Seyfert galaxies : X. sulphur abundance estimatesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001168844.pdf.txt001168844.pdf.txtExtracted Texttext/plain110518http://www.lume.ufrgs.br/bitstream/10183/268521/2/001168844.pdf.txtc7cb16f2761eb4b9d431d8683258a55eMD52ORIGINAL001168844.pdfTexto completo (inglês)application/pdf1898169http://www.lume.ufrgs.br/bitstream/10183/268521/1/001168844.pdfab791c01f4a7be42778580910da4800dMD5110183/2685212023-12-17 04:22:59.691814oai:www.lume.ufrgs.br:10183/268521Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-12-17T06:22:59Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
title |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
spellingShingle |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates Dors Júnior, Oli Luiz Galáxias ativas Evolucao galatica Formacao de galaxias Meio interestelar Galaxias seyfert ISM : Abundances Galaxies : Abundances Galaxies : Active Galaxies : Evolution Galaxies : Nuclei Galaxies : ISM Galaxies : Seyfert |
title_short |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
title_full |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
title_fullStr |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
title_full_unstemmed |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
title_sort |
Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates |
author |
Dors Júnior, Oli Luiz |
author_facet |
Dors Júnior, Oli Luiz Valerdi, Mabel Riffel, Rogemar André Riffel, Rogério Cardaci, Mónica V. Hägelle, Guillermo Federico Armah, Mark Revalski, Mitchell Flury, Sophia Freitas-Lemes, Priscila Amôres, Eduardo Brescansin de Krabbe, Angela Cristina Binette, Luc Feltre, Anna Storchi-Bergmann, Thaisa |
author_role |
author |
author2 |
Valerdi, Mabel Riffel, Rogemar André Riffel, Rogério Cardaci, Mónica V. Hägelle, Guillermo Federico Armah, Mark Revalski, Mitchell Flury, Sophia Freitas-Lemes, Priscila Amôres, Eduardo Brescansin de Krabbe, Angela Cristina Binette, Luc Feltre, Anna Storchi-Bergmann, Thaisa |
author2_role |
author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Dors Júnior, Oli Luiz Valerdi, Mabel Riffel, Rogemar André Riffel, Rogério Cardaci, Mónica V. Hägelle, Guillermo Federico Armah, Mark Revalski, Mitchell Flury, Sophia Freitas-Lemes, Priscila Amôres, Eduardo Brescansin de Krabbe, Angela Cristina Binette, Luc Feltre, Anna Storchi-Bergmann, Thaisa |
dc.subject.por.fl_str_mv |
Galáxias ativas Evolucao galatica Formacao de galaxias Meio interestelar Galaxias seyfert |
topic |
Galáxias ativas Evolucao galatica Formacao de galaxias Meio interestelar Galaxias seyfert ISM : Abundances Galaxies : Abundances Galaxies : Active Galaxies : Evolution Galaxies : Nuclei Galaxies : ISM Galaxies : Seyfert |
dc.subject.eng.fl_str_mv |
ISM : Abundances Galaxies : Abundances Galaxies : Active Galaxies : Evolution Galaxies : Nuclei Galaxies : ISM Galaxies : Seyfert |
description |
For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of the electron temperature. Narrow emission-line intensities from the Sloan Digital Sky Survey (SDSS) Data Release 17 (DR17) [in the wavelength range 3000 < λ(Å) < 9100] and from the literature for a sample of 45 nearby (z < 0.08) Sy 2s were considered. Our direct estimates indicate that Sy 2s have similar temperatures in the gas region where most of the S+ ions are located in comparison with that of star-forming regions (SFs). However, Sy 2s present higher temperature values (∼10000 K) in the region where most of the S²⁺ ions are located relative to that of SFs. We derive the total sulphur abundance in the range of 6.2 ≲ 12+log(S/H) ≲ 7.5, corresponding to 0.1–1.8 times the solar value. These sulphur abundance values are lower by ∼0.4 dex than those derived in SFs with similar metallicity, indicating a distinct chemical enrichment of the interstellar medium (ISM) for these object classes. The sulphur abundance relative to oxygen (S/O) values for our Sy 2 sample present an abrupt (∼0.5 dex) decrease with increasing oxygen abundance relative to hydrogen (O/H) for the high-metallicity regime [12 + log(O/H) ≳ 8.7)], what is not seen for the SFs. However, when our Sy 2 estimates are combined with those from a large sample of SFs, we did not find any dependence between S/O and O/H. |
publishDate |
2023 |
dc.date.accessioned.fl_str_mv |
2023-12-16T03:26:45Z |
dc.date.issued.fl_str_mv |
2023 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/268521 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001168844 |
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0035-8711 001168844 |
url |
http://hdl.handle.net/10183/268521 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 521, no. 2 (May 2023), p. 1969–1987 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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