A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars

Autores
Holanda, José Nacizo; Loaiza Tacuri, Verónica; Sonally, Ayslana; Bijavara Seshashayana, Shilpa; Roriz, Michele Pappacena; Martínez, Cintia Fernanda; Borges Fernandes, Marcelo; Bastos Pereira, Claudio; Katime Santrich, Orlando J.; Daflon, Simone
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a chemical abundance study of giant stars in the Galactic open cluster NGC 5822, which hosts two barium stars (#002 and #201) and three lithium-enriched giants (#006, #102, and #240). Using high-resolution optical and near-infrared (H and K band) spectra from FEROS and IGRINS, we determine atmospheric parameters and abundances for 23 elements (Li, C, N, O, F, Na, Mg, Al, Si, P, S, K, Ca, Sc, Ti, Cr, Fe, Ni, Y, Ce, Nd, Yb, and Pb). This includes species not yet studied in this cluster, such as F, P, K, Yb, and Pb, as well as oxygen isotopic ratios 16O/17O and 16O/18O. Membership was assessed using astrometry and chemical abundances, providing insight into the evolutionary stages of Li-enriched giants and cluster parameters (age, distance, extinction). However, the identification of Ba-stars remains challenging due to their binary nature and less reliable astrometric solutions. The cluster´s abundances are broadly consistent with expectations for the Galactic thin disc. The mean fluorine abundance agrees with chemical evolution models predicting that young clusters (<2 Gyr) exhibit elevated [F/Fe], with production from SN II, SN Ia, AGB, and Wolf─Rayet stars. No distinct chemical or rotational features were found to explain the lithium enrichment, likely occurring either during the red clump phase or near the RGB tip. For the Ba-stars, nucleosynthesis models combined with the cluster´s turn-off mass suggest polluting companion masses of 3.00 and 3.75 M⊙ for stars #002 and #201. These results highlight the importance of open clusters as laboratories for chemically peculiar stars.
Fil: Holanda, José Nacizo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Loaiza Tacuri, Verónica. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Sonally, Ayslana. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Bijavara Seshashayana, Shilpa. Malmo University; Suecia
Fil: Roriz, Michele Pappacena. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Martínez, Cintia Fernanda. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Borges Fernandes, Marcelo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Bastos Pereira, Claudio. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Katime Santrich, Orlando J.. Universidade Estadual de Santa Cruz; Brasil
Fil: Daflon, Simone. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Materia
TECHNIQUES:SPECTROSCOPY
STARS:ABUNDANCES
STARS:FUNDAMENTAL PARAMETERS
OPEN CLUSTERS AND ASSOCIATIONS:INDIVIDUAL:NGC 5822
SOLAR AND STELLAR ASTROPHYSICS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/287186
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/287186
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant starsHolanda, José NacizoLoaiza Tacuri, VerónicaSonally, AyslanaBijavara Seshashayana, ShilpaRoriz, Michele PappacenaMartínez, Cintia FernandaBorges Fernandes, MarceloBastos Pereira, ClaudioKatime Santrich, Orlando J.Daflon, SimoneTECHNIQUES:SPECTROSCOPYSTARS:ABUNDANCESSTARS:FUNDAMENTAL PARAMETERSOPEN CLUSTERS AND ASSOCIATIONS:INDIVIDUAL:NGC 5822SOLAR AND STELLAR ASTROPHYSICShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a chemical abundance study of giant stars in the Galactic open cluster NGC 5822, which hosts two barium stars (#002 and #201) and three lithium-enriched giants (#006, #102, and #240). Using high-resolution optical and near-infrared (H and K band) spectra from FEROS and IGRINS, we determine atmospheric parameters and abundances for 23 elements (Li, C, N, O, F, Na, Mg, Al, Si, P, S, K, Ca, Sc, Ti, Cr, Fe, Ni, Y, Ce, Nd, Yb, and Pb). This includes species not yet studied in this cluster, such as F, P, K, Yb, and Pb, as well as oxygen isotopic ratios 16O/17O and 16O/18O. Membership was assessed using astrometry and chemical abundances, providing insight into the evolutionary stages of Li-enriched giants and cluster parameters (age, distance, extinction). However, the identification of Ba-stars remains challenging due to their binary nature and less reliable astrometric solutions. The cluster´s abundances are broadly consistent with expectations for the Galactic thin disc. The mean fluorine abundance agrees with chemical evolution models predicting that young clusters (<2 Gyr) exhibit elevated [F/Fe], with production from SN II, SN Ia, AGB, and Wolf─Rayet stars. No distinct chemical or rotational features were found to explain the lithium enrichment, likely occurring either during the red clump phase or near the RGB tip. For the Ba-stars, nucleosynthesis models combined with the cluster´s turn-off mass suggest polluting companion masses of 3.00 and 3.75 M⊙ for stars #002 and #201. These results highlight the importance of open clusters as laboratories for chemically peculiar stars.Fil: Holanda, José Nacizo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Loaiza Tacuri, Verónica. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Sonally, Ayslana. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Bijavara Seshashayana, Shilpa. Malmo University; SueciaFil: Roriz, Michele Pappacena. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Martínez, Cintia Fernanda. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Borges Fernandes, Marcelo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Bastos Pereira, Claudio. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Katime Santrich, Orlando J.. Universidade Estadual de Santa Cruz; BrasilFil: Daflon, Simone. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilWiley Blackwell Publishing, Inc2026-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/287186Holanda, José Nacizo; Loaiza Tacuri, Verónica; Sonally, Ayslana; Bijavara Seshashayana, Shilpa; Roriz, Michele Pappacena; et al.; A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 546; 2; 2-2026; 1-180035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/doi/10.1093/mnras/staf2286/8408445info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staf2286info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T14:34:38Zoai:ri.conicet.gov.ar:11336/287186instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-08-25 14:34:38.881CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
title A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
spellingShingle A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
Holanda, José Nacizo
TECHNIQUES:SPECTROSCOPY
STARS:ABUNDANCES
STARS:FUNDAMENTAL PARAMETERS
OPEN CLUSTERS AND ASSOCIATIONS:INDIVIDUAL:NGC 5822
SOLAR AND STELLAR ASTROPHYSICS
title_short A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
title_full A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
title_fullStr A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
title_full_unstemmed A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
title_sort A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars
dc.creator.none.fl_str_mv Holanda, José Nacizo
Loaiza Tacuri, Verónica
Sonally, Ayslana
Bijavara Seshashayana, Shilpa
Roriz, Michele Pappacena
Martínez, Cintia Fernanda
Borges Fernandes, Marcelo
Bastos Pereira, Claudio
Katime Santrich, Orlando J.
Daflon, Simone
author Holanda, José Nacizo
author_facet Holanda, José Nacizo
Loaiza Tacuri, Verónica
Sonally, Ayslana
Bijavara Seshashayana, Shilpa
Roriz, Michele Pappacena
Martínez, Cintia Fernanda
Borges Fernandes, Marcelo
Bastos Pereira, Claudio
Katime Santrich, Orlando J.
Daflon, Simone
author_role author
author2 Loaiza Tacuri, Verónica
Sonally, Ayslana
Bijavara Seshashayana, Shilpa
Roriz, Michele Pappacena
Martínez, Cintia Fernanda
Borges Fernandes, Marcelo
Bastos Pereira, Claudio
Katime Santrich, Orlando J.
Daflon, Simone
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv TECHNIQUES:SPECTROSCOPY
STARS:ABUNDANCES
STARS:FUNDAMENTAL PARAMETERS
OPEN CLUSTERS AND ASSOCIATIONS:INDIVIDUAL:NGC 5822
SOLAR AND STELLAR ASTROPHYSICS
topic TECHNIQUES:SPECTROSCOPY
STARS:ABUNDANCES
STARS:FUNDAMENTAL PARAMETERS
OPEN CLUSTERS AND ASSOCIATIONS:INDIVIDUAL:NGC 5822
SOLAR AND STELLAR ASTROPHYSICS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present a chemical abundance study of giant stars in the Galactic open cluster NGC 5822, which hosts two barium stars (#002 and #201) and three lithium-enriched giants (#006, #102, and #240). Using high-resolution optical and near-infrared (H and K band) spectra from FEROS and IGRINS, we determine atmospheric parameters and abundances for 23 elements (Li, C, N, O, F, Na, Mg, Al, Si, P, S, K, Ca, Sc, Ti, Cr, Fe, Ni, Y, Ce, Nd, Yb, and Pb). This includes species not yet studied in this cluster, such as F, P, K, Yb, and Pb, as well as oxygen isotopic ratios 16O/17O and 16O/18O. Membership was assessed using astrometry and chemical abundances, providing insight into the evolutionary stages of Li-enriched giants and cluster parameters (age, distance, extinction). However, the identification of Ba-stars remains challenging due to their binary nature and less reliable astrometric solutions. The cluster´s abundances are broadly consistent with expectations for the Galactic thin disc. The mean fluorine abundance agrees with chemical evolution models predicting that young clusters (<2 Gyr) exhibit elevated [F/Fe], with production from SN II, SN Ia, AGB, and Wolf─Rayet stars. No distinct chemical or rotational features were found to explain the lithium enrichment, likely occurring either during the red clump phase or near the RGB tip. For the Ba-stars, nucleosynthesis models combined with the cluster´s turn-off mass suggest polluting companion masses of 3.00 and 3.75 M⊙ for stars #002 and #201. These results highlight the importance of open clusters as laboratories for chemically peculiar stars.
Fil: Holanda, José Nacizo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Loaiza Tacuri, Verónica. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Sonally, Ayslana. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Bijavara Seshashayana, Shilpa. Malmo University; Suecia
Fil: Roriz, Michele Pappacena. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Martínez, Cintia Fernanda. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Borges Fernandes, Marcelo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Bastos Pereira, Claudio. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Katime Santrich, Orlando J.. Universidade Estadual de Santa Cruz; Brasil
Fil: Daflon, Simone. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
description We present a chemical abundance study of giant stars in the Galactic open cluster NGC 5822, which hosts two barium stars (#002 and #201) and three lithium-enriched giants (#006, #102, and #240). Using high-resolution optical and near-infrared (H and K band) spectra from FEROS and IGRINS, we determine atmospheric parameters and abundances for 23 elements (Li, C, N, O, F, Na, Mg, Al, Si, P, S, K, Ca, Sc, Ti, Cr, Fe, Ni, Y, Ce, Nd, Yb, and Pb). This includes species not yet studied in this cluster, such as F, P, K, Yb, and Pb, as well as oxygen isotopic ratios 16O/17O and 16O/18O. Membership was assessed using astrometry and chemical abundances, providing insight into the evolutionary stages of Li-enriched giants and cluster parameters (age, distance, extinction). However, the identification of Ba-stars remains challenging due to their binary nature and less reliable astrometric solutions. The cluster´s abundances are broadly consistent with expectations for the Galactic thin disc. The mean fluorine abundance agrees with chemical evolution models predicting that young clusters (<2 Gyr) exhibit elevated [F/Fe], with production from SN II, SN Ia, AGB, and Wolf─Rayet stars. No distinct chemical or rotational features were found to explain the lithium enrichment, likely occurring either during the red clump phase or near the RGB tip. For the Ba-stars, nucleosynthesis models combined with the cluster´s turn-off mass suggest polluting companion masses of 3.00 and 3.75 M⊙ for stars #002 and #201. These results highlight the importance of open clusters as laboratories for chemically peculiar stars.
publishDate 2026
dc.date.none.fl_str_mv 2026-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/287186
Holanda, José Nacizo; Loaiza Tacuri, Verónica; Sonally, Ayslana; Bijavara Seshashayana, Shilpa; Roriz, Michele Pappacena; et al.; A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 546; 2; 2-2026; 1-18
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/287186
identifier_str_mv Holanda, José Nacizo; Loaiza Tacuri, Verónica; Sonally, Ayslana; Bijavara Seshashayana, Shilpa; Roriz, Michele Pappacena; et al.; A near-infrared and optical study of NGC 5822: An open cluster hosting barium-stars and lithium-enriched giant stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 546; 2; 2-2026; 1-18
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/doi/10.1093/mnras/staf2286/8408445
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staf2286
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.265058

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