A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912

Autores
Biswas, Samrat; Medhi, Biman J; Deb, Sushmita; Deb, Sukanta; Das, H S; Perren, Gabriel Ignacio
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This paper presents a comprehensive multi-wavelength investigation of the intermediate-age open cluster NGC 1912. We identified 401 member stars for NGC 1912 using K-nearest neighbour (kNN) and Gaussian Mixture Model (GMM) machine learning techniques. The fundamental parameters determined for the cluster are Metallicity (z) = 0.0141 ± 0.0006, Log(age) = 8.519 ± 0.040, Binary fraction (bfrac) = 0.445 ± 0.035, Visual extinction (AV) = 0.864 ± 0.033 mag, Total-to-selective extinction ratio (RV) = 3.007 ± 0.096, distance = 1096 ± 15 pc. The central density (ρo), core radius (rc), tidal radius (rt), and background density (ρbg) for the cluster are obtained as 0.643 ± 0.067 stars arcmin−2, 7.743 ± 0.784 arcmin, 84.633 ± 7.188 arcmin, and 0.001 ± 0.000 stars arcmin−2, respectively. Dynamical mass segregation study revealed a concentration of some apparently massive stars towards the cluster center. Polarimetric analysis of 90 stars in BVRcIc wavelength bands revealed that the observed polarization in NGC 1912 is not solely attributed to interstellar dust. The Galactic magnetic field is dominant in this region. Dust grain sizes within the intra-cluster region are found to be relatively smaller than that of the general ISM. The extinction map revealed the existence of a potential ”interstellar bubble” located close to the cluster region. Towards the periphery of the probable bubble region, that displays an ovoid-like geometry, 16 probable young stellar objects (YSOs) have been detected, suggesting the ongoing of triggered secondary star formation events in this region.
Fil: Biswas, Samrat. Gauhati University; India
Fil: Medhi, Biman J. Gauhati University; India
Fil: Deb, Sushmita. Gauhati University; India
Fil: Deb, Sukanta. Cotton University; India
Fil: Das, H S. Assam University; India
Fil: Perren, Gabriel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
Materia
polarization
dust
extinction
ISM: magnetic fields
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/265093
Acceder
id CONICETDig_c0b3b8071c798c998aa6426420c8b757
oai_identifier_str oai:ri.conicet.gov.ar:11336/265093
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912Biswas, SamratMedhi, Biman JDeb, SushmitaDeb, SukantaDas, H SPerren, Gabriel IgnaciopolarizationdustextinctionISM: magnetic fieldshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1This paper presents a comprehensive multi-wavelength investigation of the intermediate-age open cluster NGC 1912. We identified 401 member stars for NGC 1912 using K-nearest neighbour (kNN) and Gaussian Mixture Model (GMM) machine learning techniques. The fundamental parameters determined for the cluster are Metallicity (z) = 0.0141 ± 0.0006, Log(age) = 8.519 ± 0.040, Binary fraction (bfrac) = 0.445 ± 0.035, Visual extinction (AV) = 0.864 ± 0.033 mag, Total-to-selective extinction ratio (RV) = 3.007 ± 0.096, distance = 1096 ± 15 pc. The central density (ρo), core radius (rc), tidal radius (rt), and background density (ρbg) for the cluster are obtained as 0.643 ± 0.067 stars arcmin−2, 7.743 ± 0.784 arcmin, 84.633 ± 7.188 arcmin, and 0.001 ± 0.000 stars arcmin−2, respectively. Dynamical mass segregation study revealed a concentration of some apparently massive stars towards the cluster center. Polarimetric analysis of 90 stars in BVRcIc wavelength bands revealed that the observed polarization in NGC 1912 is not solely attributed to interstellar dust. The Galactic magnetic field is dominant in this region. Dust grain sizes within the intra-cluster region are found to be relatively smaller than that of the general ISM. The extinction map revealed the existence of a potential ”interstellar bubble” located close to the cluster region. Towards the periphery of the probable bubble region, that displays an ovoid-like geometry, 16 probable young stellar objects (YSOs) have been detected, suggesting the ongoing of triggered secondary star formation events in this region.Fil: Biswas, Samrat. Gauhati University; IndiaFil: Medhi, Biman J. Gauhati University; IndiaFil: Deb, Sushmita. Gauhati University; IndiaFil: Deb, Sukanta. Cotton University; IndiaFil: Das, H S. Assam University; IndiaFil: Perren, Gabriel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaWiley Blackwell Publishing, Inc2024-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/265093Biswas, Samrat; Medhi, Biman J; Deb, Sushmita; Deb, Sukanta; Das, H S; et al.; A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 532; 2; 6-2024; 1241-12610035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stae1476/7692035info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stae1476info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:40:16Zoai:ri.conicet.gov.ar:11336/265093instacron: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:34982025-09-29 09:40:17.058CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
title A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
spellingShingle A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
Biswas, Samrat
polarization
dust
extinction
ISM: magnetic fields
title_short A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
title_full A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
title_fullStr A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
title_full_unstemmed A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
title_sort A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912
dc.creator.none.fl_str_mv Biswas, Samrat
Medhi, Biman J
Deb, Sushmita
Deb, Sukanta
Das, H S
Perren, Gabriel Ignacio
author Biswas, Samrat
author_facet Biswas, Samrat
Medhi, Biman J
Deb, Sushmita
Deb, Sukanta
Das, H S
Perren, Gabriel Ignacio
author_role author
author2 Medhi, Biman J
Deb, Sushmita
Deb, Sukanta
Das, H S
Perren, Gabriel Ignacio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv polarization
dust
extinction
ISM: magnetic fields
topic polarization
dust
extinction
ISM: magnetic fields
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This paper presents a comprehensive multi-wavelength investigation of the intermediate-age open cluster NGC 1912. We identified 401 member stars for NGC 1912 using K-nearest neighbour (kNN) and Gaussian Mixture Model (GMM) machine learning techniques. The fundamental parameters determined for the cluster are Metallicity (z) = 0.0141 ± 0.0006, Log(age) = 8.519 ± 0.040, Binary fraction (bfrac) = 0.445 ± 0.035, Visual extinction (AV) = 0.864 ± 0.033 mag, Total-to-selective extinction ratio (RV) = 3.007 ± 0.096, distance = 1096 ± 15 pc. The central density (ρo), core radius (rc), tidal radius (rt), and background density (ρbg) for the cluster are obtained as 0.643 ± 0.067 stars arcmin−2, 7.743 ± 0.784 arcmin, 84.633 ± 7.188 arcmin, and 0.001 ± 0.000 stars arcmin−2, respectively. Dynamical mass segregation study revealed a concentration of some apparently massive stars towards the cluster center. Polarimetric analysis of 90 stars in BVRcIc wavelength bands revealed that the observed polarization in NGC 1912 is not solely attributed to interstellar dust. The Galactic magnetic field is dominant in this region. Dust grain sizes within the intra-cluster region are found to be relatively smaller than that of the general ISM. The extinction map revealed the existence of a potential ”interstellar bubble” located close to the cluster region. Towards the periphery of the probable bubble region, that displays an ovoid-like geometry, 16 probable young stellar objects (YSOs) have been detected, suggesting the ongoing of triggered secondary star formation events in this region.
Fil: Biswas, Samrat. Gauhati University; India
Fil: Medhi, Biman J. Gauhati University; India
Fil: Deb, Sushmita. Gauhati University; India
Fil: Deb, Sukanta. Cotton University; India
Fil: Das, H S. Assam University; India
Fil: Perren, Gabriel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina
description This paper presents a comprehensive multi-wavelength investigation of the intermediate-age open cluster NGC 1912. We identified 401 member stars for NGC 1912 using K-nearest neighbour (kNN) and Gaussian Mixture Model (GMM) machine learning techniques. The fundamental parameters determined for the cluster are Metallicity (z) = 0.0141 ± 0.0006, Log(age) = 8.519 ± 0.040, Binary fraction (bfrac) = 0.445 ± 0.035, Visual extinction (AV) = 0.864 ± 0.033 mag, Total-to-selective extinction ratio (RV) = 3.007 ± 0.096, distance = 1096 ± 15 pc. The central density (ρo), core radius (rc), tidal radius (rt), and background density (ρbg) for the cluster are obtained as 0.643 ± 0.067 stars arcmin−2, 7.743 ± 0.784 arcmin, 84.633 ± 7.188 arcmin, and 0.001 ± 0.000 stars arcmin−2, respectively. Dynamical mass segregation study revealed a concentration of some apparently massive stars towards the cluster center. Polarimetric analysis of 90 stars in BVRcIc wavelength bands revealed that the observed polarization in NGC 1912 is not solely attributed to interstellar dust. The Galactic magnetic field is dominant in this region. Dust grain sizes within the intra-cluster region are found to be relatively smaller than that of the general ISM. The extinction map revealed the existence of a potential ”interstellar bubble” located close to the cluster region. Towards the periphery of the probable bubble region, that displays an ovoid-like geometry, 16 probable young stellar objects (YSOs) have been detected, suggesting the ongoing of triggered secondary star formation events in this region.
publishDate 2024
dc.date.none.fl_str_mv 2024-06
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/11336/265093
Biswas, Samrat; Medhi, Biman J; Deb, Sushmita; Deb, Sukanta; Das, H S; et al.; A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 532; 2; 6-2024; 1241-1261
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/265093
identifier_str_mv Biswas, Samrat; Medhi, Biman J; Deb, Sushmita; Deb, Sukanta; Das, H S; et al.; A statistical approach to polarimetric and photometric investigation of the intermediate-age open cluster NGC 1912; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 532; 2; 6-2024; 1241-1261
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/advance-article/doi/10.1093/mnras/stae1476/7692035
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stae1476
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/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 13.070432

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