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dc.contributor.author
Galdeano Mantiñán, María Daniela
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Ferrero Sosa, Gabriel Antonio
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Coldwell Lloveras, Georgina Vanesa
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Duplancic Videla, Maria Fernanda
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Alonso, Sol
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Riffel, Rogerio
dc.contributor.author
Minniti, Dante
dc.date.available
2023-11-07T13:19:02Z
dc.date.issued
2022-11
dc.identifier.citation
Galdeano Mantiñán, María Daniela; Ferrero Sosa, Gabriel Antonio; Coldwell Lloveras, Georgina Vanesa; Duplancic Videla, Maria Fernanda; Alonso, Sol; et al.; Unveiling a new extragalactic structure hidden by the Milky Way; EDP Sciences; Astronomy and Astrophysics; 669; 11-2022; 1-8
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/217313
dc.description.abstract
Context. The zone of avoidance (ZoA) does not allow for clear optical observations of extragalactic sources behind the Milky Way due to the meaningful extinction of the optical emission of these objects. Observations in near-infrared (NIR) wavelengths represent a potential source of astronomical discoveries that support the detection of new galaxies and potentially complete the picture of the large-scale structures in this as-yet poorly explored area of the sky. Aims. Our aim is to decipher the nature of the overdensity located behind the Milky Way in tile b204 of the VISTA Variables in Vía Láctea (VVV) survey. Methods. We studied an area of six arcmin around a galaxy concentration located at l = 354.82 and b = -9.81. We selected five galaxies, taking into account the source distribution on the sky to optimise the requested time for the observations, and we obtained the spectra with Flamingos 2 long-slit spectrograph at Gemini South 8.1-meter telescope. To identify and characterise the absorption features, we fit the galaxies underlying spectrum using the STARLIGHT code together with the IRTF stellar library. In addition, the spectroscopic findings are reinforced using complementary photometric techniques such as red-sequence and photometric redshift estimation. Results. The mean spectroscopic redshift estimated from the NIR spectra is z = 0.225 ± 0.014. This value presents a good agreement with that obtained from photometric analysis, photoz = 0.21 ± 0.08, and the probability distribution function of the galaxies in the studied region. Also, the red-sequence slope is consistent with the one expected for NIR observations of galaxy clusters. Conclusions. The redshifts obtained from both, photometric and spectroscopic techniques are in good agreement, allowing for the confirmation of the nature of this structure at z = 0.225 ± 0.014, thereby unveiling a new galaxy cluster, VVVGCl-B J181435-381432, behind the Milky Way bulge.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
GALAXIES: CLUSTERS: GENERAL
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GALAXY: STRUCTURE
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INFRARED: GALAXIES
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TECHNIQUES: SPECTROSCOPIC
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Otras Ciencias Naturales y Exactas
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Otras Ciencias Naturales y Exactas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Unveiling a new extragalactic structure hidden by the Milky Way
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-11-06T16:07:15Z
dc.journal.volume
669
dc.journal.pagination
1-8
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Galdeano Mantiñán, María Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
dc.description.fil
Fil: Ferrero Sosa, Gabriel Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
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Fil: Coldwell Lloveras, Georgina Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
dc.description.fil
Fil: Duplancic Videla, Maria Fernanda. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Alonso, Sol. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
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Fil: Riffel, Rogerio. Universidade Federal do Rio Grande; Brasil
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Fil: Minniti, Dante. Universidad Andrés Bello; Chile
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/202245034
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