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| DOI | 10.1093/MNRAS/STAD490 | ||||
| Año | 2023 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The goal of this work is to search for Active Galactic Nuclei (AGN) in the Galactic disc at very low latitudes with |b| < 2 degrees. For this, we studied the five sources from the VVV near-infrared (IR) galaxy catalogue that have also WISE counterparts and present variability in the VIrac VAriable Classification Ensemble (VIVACE) catalogue. In the near-IR colour-colour diagrams, these objects have in general redder colours compared to the rest of the sources in the field. In the mid-IR ones, they are located in the AGN region, however, there is a source that presents the highest interstellar extinction and different mid-IR colours to be a young stellar object (YSO). We also studied the source variability using two different statistical methods. The fractional variability amplitude sigma(rms) ranges from 12.6 to 33.8, being in concordance with previous results found for type-1 AGNs. The slopes of the light curves are in the range (2.6 - 4.7) x 10(-4) mag d(-1), also in agreement with results reported on quasars variability. The combination of all these results suggest that four galaxies are type-1 AGN candidates, whereas the fifth source likely a YSO candidate.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Baravalle, Laura D. | Mujer |
UNC - Argentina
UNIV NACL CORDOBA - Argentina Instituto de Astronomia Teorica y Experimental - Argentina Observatorio Astronomico de la Universidad Nacional de Cordoba - Argentina |
| 2 | Schmidt, Eduardo O. | Hombre |
UNC - Argentina
UNIV NACL CORDOBA - Argentina Instituto de Astronomia Teorica y Experimental - Argentina Observatorio Astronomico de la Universidad Nacional de Cordoba - Argentina |
| 3 | ALONSO, MARIA VICTORIA | Mujer |
UNC - Argentina
UNIV NACL CORDOBA - Argentina Instituto de Astronomia Teorica y Experimental - Argentina Observatorio Astronomico de la Universidad Nacional de Cordoba - Argentina |
| 4 | Pichel, Ana | - |
UBA - Argentina
Instituto de Astronomía y Física del Espacio - Argentina |
| 5 | MINNITI-DEL BARCO, DANTE | Hombre |
Universidad Nacional Andrés Bello - Chile
Vatican Observ - Vaticano Vatican Observatory - Italia |
| 6 | Rodriguez-Kamenetzky, Adriana | Mujer |
UNC - Argentina
Instituto de Astronomia Teorica y Experimental - Argentina |
| 7 | Masetti, N. | Mujer |
Universidad Nacional Andrés Bello - Chile
INAF Osservatorio Astrofis & Sci Spazio - Italia INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna - Italia |
| 8 | Villalon, Carolina | Mujer |
UNC - Argentina
Instituto de Astronomia Teorica y Experimental - Argentina |
| 9 | Smith, L. C. | Mujer |
UNIV CAMBRIDGE - Reino Unido
Institute of Astronomy - Reino Unido |
| 10 | Lucas, Philip | Hombre |
Univ Hertfordshire - Reino Unido
University of Hertfordshire - Reino Unido |
| Fuente |
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| FONDECYT |
| Consejo Nacional de Investigaciones Científicas y Técnicas |
| Fondo Nacional de Desarrollo Científico y Tecnológico |
| Secretaria de Ciencia y Tecnica de la Universidad Nacional de Cordoba (SeCyT) |
| Secretaría de Ciencia y Técnica, Universidad de Buenos Aires |
| Cambridge Astronomical Survey Unit |
| Agencia Nacional de Investigación y Desarrollo |
| ANID Basal Projects |
| Consejo de Investigaciones Cientificas y Tecnicas (CONICET) Consejo de Investigaciones Cientificas y Tecnicas (CONICET) |
| Agradecimiento |
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| We would like to thank the anonymous referee for the useful comments and suggestions which has helped to improve this paper. This work was partially supported by Consejo de Investigaciones Cientificas y Tecnicas (CONICET) and Secretaria de Ciencia y Tecnica de la Universidad Nacional de Cordoba (SecyT). The authors gratefully acknowledge data from the ESO Public Survey program IDs 179.B-2002 and 198.B-2004 taken with the VISTA telescope, and products from the Cambridge Astronomical Survey Unit (CASU). DM gratefully acknowledges support by the ANID BASAL projects ACE210002 and FB210003 and by Fondecyt Project Number 1220724. |
| We would like to thank the anonymous referee for the useful comments and suggestions which has helped to improve this paper. This work was partially supported by Consejo de Investigaciones Científicas y Técnicas (CONICET) and Secretaría de Ciencia y Técnica de la Universidad Nacional de Córdoba (SecyT). The authors gratefully acknowledge data from the ESO Public Survey program IDs 179.B-2002 and 198.B-2004 taken with the VISTA telescope, and products from the Cambridge Astronomical Survey Unit (CASU). DM gratefully acknowledges support by the ANID BASAL projects ACE210002 and FB210003 and by Fondecyt Project Number 1220724. |