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dc.contributor.author
Casmir Obasi
dc.contributor.author
Gomez, Matias
dc.contributor.author
Minniti, Dante
dc.contributor.author
Alonso Garcia, Javier
dc.contributor.author
Hempel, Maren
dc.contributor.author
Pullen, J.B.
dc.contributor.author
Gregg, M.G.
dc.contributor.author
Baravalle, Laura Daniela
dc.contributor.author
Alonso, Maria Victoria
dc.contributor.author
Okere, B.
dc.date.available
2024-02-08T10:50:28Z
dc.date.issued
2023-02
dc.identifier.citation
Casmir Obasi; Gomez, Matias; Minniti, Dante; Alonso Garcia, Javier; Hempel, Maren; et al.; The globular cluster system of the nearest Seyfert II galaxy Circinus; EDP Sciences; Astronomy and Astrophysics; 670; A18; 2-2023; 1-13
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/226259
dc.description.abstract
Context. The globular cluster (GC) system of Circinus galaxy has not been probed previously partly because of the location of the galaxy at a- 3.8 Galactic latitude, which suffers severely from interstellar extinction, stellar crowding, and Galactic foreground contamination. However, the deep near-infrared (NIR) photometry by the VISTA Variables in the Via Láctea Extended Survey (VVVX) in combination with the precise astrometry of Gaia EDR3 allow us to map GCs in this region. Aims. Our long-term goal is to study and characterise the distributions of GCs and ultra-compact dwarfs in Circinus galaxy, which is the nearest Seyfert II galaxy. Here we conduct the first pilot search for GCs in this galaxy. Methods. We used NIR VVVX photometry in combination with Gaia EDR3 astrometric features, such as astrometric excess noise and the ratio of the sum of the blue photometer (BP) and red photometer (RP) to the broad G passband (BRexcess), to build the first homogeneous catalogue of GCs in Circinus galaxy. A robust combination of selection criteria allows us to effectively clean interlopers from our sample. Results We report the detection of a ¼70 GC candidates in this galaxy at a 3I confidence level. They show a bimodal colour distribution with the blue peak at (Ga- a- a- Ks)0 = 0.985±0.127 mag with a dispersion of 0.211±0.091 mag and the red peak at (Ga- a- a- Ks)0 = 1.625±0.177 mag with a dispersion of 0.482±0.114 mag. A GC specific frequency (Sa-N) of 1.3±0.2 was derived for the galaxy, and we estimated a total population of 120±40 GCs. Based on the projected radial distribution it appears that Circinus has a different distribution of GC candidates than MW and M 31. Conclusions. We demonstrate that Circinus galaxy hosts a sizeable number of cluster candidates. This result is the first leap towards understanding the evolution of old stellar clusters in this galaxy.
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/2.5/ar/
dc.subject
GALAXIES: CLUSTERS:GENERAL
dc.subject
GALAXIES: STELLAR CONTENT
dc.subject
GALAXIES: SPIRAL
dc.subject.classification
Astronomía
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Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The globular cluster system of the nearest Seyfert II galaxy Circinus
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-02-06T14:05:34Z
dc.journal.volume
670
dc.journal.number
A18
dc.journal.pagination
1-13
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Casmir Obasi. Universidad Andrés Bello; Chile. University of Nigeria; Nigeria
dc.description.fil
Fil: Gomez, Matias. Universidad Andrés Bello; Chile
dc.description.fil
Fil: Minniti, Dante. Universidad Andrés Bello; Chile. Vatican Observatory; Italia
dc.description.fil
Fil: Alonso Garcia, Javier. Universidad de Antofagasta; . Millennium Institute of Astrophysics; Chile
dc.description.fil
Fil: Hempel, Maren. Universidad Andrés Bello; Chile. Max-Planck Institute for Astronomy; Alemania
dc.description.fil
Fil: Pullen, J.B.. Universidad Andrés Bello; Chile
dc.description.fil
Fil: Gregg, M.G.. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Baravalle, Laura Daniela. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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
dc.description.fil
Fil: Alonso, Maria Victoria. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
dc.description.fil
Fil: Okere, B.. University of Nigeria; Nigeria
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/pdf/2023/02/aa43154-22.pdf
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/ 10.1051/0004-6361/202243154
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