NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra

Autores
Gaspar, Gaia; Chalela Garcia, Martin; Cabral, Juan Bautista; Alacoria, José Alberto; Mast, Damian; Diaz, Ruben Joaquin
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Hot dust in the proximity of active galactic nuclei (AGNs) strongly emits in the near-infrared producing a red excess that, in type 2 sources, can be modelled to measure its temperature. In the era of high spatial resolution multiwavelength data, mapping the hot dust around supermassive black holes is important for the efforts to achieve a complete picture of the dust´s role and distribution around these compact objects. In this work, we propose a methodology to detect the hot dust emission in the proximity of type 2 AGNs and measure its temperature using K-band spectra (λc = 2.2 µm). To achieve this, we have developed NIRDUST, a PYTHON package for modelling K-band spectra, estimating the dust temperature, and characterizing the involved uncertainties. We tested synthetic and real spectra in order to check the performance and suitability of the physical model over different types of data. Our tests on synthetic spectra demonstrated that the obtained results are influenced by the signal-to-noise ratio (S/N) of the input spectra. However, we accurately characterized the uncertainties, which remained below ~150 K for an average S/N per pixel exceeding 20. Applying NIRDUST to NGC 5128 (Centaurus A), observed with the Gemini South Telescope, we estimated a dust temperature of 662 and 667 K from Flamingos-2 spectra and 697 and 607 K from Gemini Near-Infrared Spectrograph (GNIRS) spectra using two different approaches.
Fil: Gaspar, Gaia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Chalela Garcia, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Cabral, Juan Bautista. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Alacoria, José Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Mast, Damian. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Diaz, Ruben Joaquin. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
METHODS: DATA ANALYSIS
TECHNIQUES: SPECTROSCOPIC
DUST
EXTINCTION
GALAXIES: ACTIVE
GALAXIES NUCLEI
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:11336/238179
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/238179
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling NIRDUST: probing hot dust emission around type 2 AGN using K-band spectraGaspar, GaiaChalela Garcia, MartinCabral, Juan BautistaAlacoria, José AlbertoMast, DamianDiaz, Ruben JoaquinMETHODS: DATA ANALYSISTECHNIQUES: SPECTROSCOPICDUSTEXTINCTIONGALAXIES: ACTIVEGALAXIES NUCLEIhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Hot dust in the proximity of active galactic nuclei (AGNs) strongly emits in the near-infrared producing a red excess that, in type 2 sources, can be modelled to measure its temperature. In the era of high spatial resolution multiwavelength data, mapping the hot dust around supermassive black holes is important for the efforts to achieve a complete picture of the dust´s role and distribution around these compact objects. In this work, we propose a methodology to detect the hot dust emission in the proximity of type 2 AGNs and measure its temperature using K-band spectra (λc = 2.2 µm). To achieve this, we have developed NIRDUST, a PYTHON package for modelling K-band spectra, estimating the dust temperature, and characterizing the involved uncertainties. We tested synthetic and real spectra in order to check the performance and suitability of the physical model over different types of data. Our tests on synthetic spectra demonstrated that the obtained results are influenced by the signal-to-noise ratio (S/N) of the input spectra. However, we accurately characterized the uncertainties, which remained below ~150 K for an average S/N per pixel exceeding 20. Applying NIRDUST to NGC 5128 (Centaurus A), observed with the Gemini South Telescope, we estimated a dust temperature of 662 and 667 K from Flamingos-2 spectra and 697 and 607 K from Gemini Near-Infrared Spectrograph (GNIRS) spectra using two different approaches.Fil: Gaspar, Gaia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Chalela Garcia, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Cabral, Juan Bautista. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Alacoria, José Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Mast, Damian. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Diaz, Ruben Joaquin. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaOxford University Press2024-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/238179Gaspar, Gaia; Chalela Garcia, Martin; Cabral, Juan Bautista; Alacoria, José Alberto; Mast, Damian; et al.; NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 528; 2; 2-2024; 2952-29630035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stae008info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T15:31:49Zoai:ri.conicet.gov.ar:11336/238179instacron: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 15:31:50.1CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
title NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
spellingShingle NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
Gaspar, Gaia
METHODS: DATA ANALYSIS
TECHNIQUES: SPECTROSCOPIC
DUST
EXTINCTION
GALAXIES: ACTIVE
GALAXIES NUCLEI
title_short NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
title_full NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
title_fullStr NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
title_full_unstemmed NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
title_sort NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra
dc.creator.none.fl_str_mv Gaspar, Gaia
Chalela Garcia, Martin
Cabral, Juan Bautista
Alacoria, José Alberto
Mast, Damian
Diaz, Ruben Joaquin
author Gaspar, Gaia
author_facet Gaspar, Gaia
Chalela Garcia, Martin
Cabral, Juan Bautista
Alacoria, José Alberto
Mast, Damian
Diaz, Ruben Joaquin
author_role author
author2 Chalela Garcia, Martin
Cabral, Juan Bautista
Alacoria, José Alberto
Mast, Damian
Diaz, Ruben Joaquin
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv METHODS: DATA ANALYSIS
TECHNIQUES: SPECTROSCOPIC
DUST
EXTINCTION
GALAXIES: ACTIVE
GALAXIES NUCLEI
topic METHODS: DATA ANALYSIS
TECHNIQUES: SPECTROSCOPIC
DUST
EXTINCTION
GALAXIES: ACTIVE
GALAXIES NUCLEI
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Hot dust in the proximity of active galactic nuclei (AGNs) strongly emits in the near-infrared producing a red excess that, in type 2 sources, can be modelled to measure its temperature. In the era of high spatial resolution multiwavelength data, mapping the hot dust around supermassive black holes is important for the efforts to achieve a complete picture of the dust´s role and distribution around these compact objects. In this work, we propose a methodology to detect the hot dust emission in the proximity of type 2 AGNs and measure its temperature using K-band spectra (λc = 2.2 µm). To achieve this, we have developed NIRDUST, a PYTHON package for modelling K-band spectra, estimating the dust temperature, and characterizing the involved uncertainties. We tested synthetic and real spectra in order to check the performance and suitability of the physical model over different types of data. Our tests on synthetic spectra demonstrated that the obtained results are influenced by the signal-to-noise ratio (S/N) of the input spectra. However, we accurately characterized the uncertainties, which remained below ~150 K for an average S/N per pixel exceeding 20. Applying NIRDUST to NGC 5128 (Centaurus A), observed with the Gemini South Telescope, we estimated a dust temperature of 662 and 667 K from Flamingos-2 spectra and 697 and 607 K from Gemini Near-Infrared Spectrograph (GNIRS) spectra using two different approaches.
Fil: Gaspar, Gaia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Chalela Garcia, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Cabral, Juan Bautista. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Alacoria, José Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Mast, Damian. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Diaz, Ruben Joaquin. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Hot dust in the proximity of active galactic nuclei (AGNs) strongly emits in the near-infrared producing a red excess that, in type 2 sources, can be modelled to measure its temperature. In the era of high spatial resolution multiwavelength data, mapping the hot dust around supermassive black holes is important for the efforts to achieve a complete picture of the dust´s role and distribution around these compact objects. In this work, we propose a methodology to detect the hot dust emission in the proximity of type 2 AGNs and measure its temperature using K-band spectra (λc = 2.2 µm). To achieve this, we have developed NIRDUST, a PYTHON package for modelling K-band spectra, estimating the dust temperature, and characterizing the involved uncertainties. We tested synthetic and real spectra in order to check the performance and suitability of the physical model over different types of data. Our tests on synthetic spectra demonstrated that the obtained results are influenced by the signal-to-noise ratio (S/N) of the input spectra. However, we accurately characterized the uncertainties, which remained below ~150 K for an average S/N per pixel exceeding 20. Applying NIRDUST to NGC 5128 (Centaurus A), observed with the Gemini South Telescope, we estimated a dust temperature of 662 and 667 K from Flamingos-2 spectra and 697 and 607 K from Gemini Near-Infrared Spectrograph (GNIRS) spectra using two different approaches.
publishDate 2024
dc.date.none.fl_str_mv 2024-02
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/11336/238179
Gaspar, Gaia; Chalela Garcia, Martin; Cabral, Juan Bautista; Alacoria, José Alberto; Mast, Damian; et al.; NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 528; 2; 2-2024; 2952-2963
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/238179
identifier_str_mv Gaspar, Gaia; Chalela Garcia, Martin; Cabral, Juan Bautista; Alacoria, José Alberto; Mast, Damian; et al.; NIRDUST: probing hot dust emission around type 2 AGN using K-band spectra; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 528; 2; 2-2024; 2952-2963
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/doi/10.1093/mnras/stae008
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 Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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 13.365483

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