Cluster membership for the long-period Cepheid calibrator SV Vul
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Título: | Cluster membership for the long-period Cepheid calibrator SV Vul |
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Autor/es: | Negueruela, Ignacio | Dorda Laforet, Ricardo | Marco, Amparo |
Grupo/s de investigación o GITE: | Astrofísica Estelar (AE) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Stars: evolution | Hertzsprung–Russell and colour–magnitude diagrams | Supergiants | Stars: variables: Cepheids | Open clusters and associations: individual: Alicante 13 |
Área/s de conocimiento: | Astronomía y Astrofísica |
Fecha de publicación: | 20-abr-2020 |
Editor: | Oxford University Press |
Cita bibliográfica: | Monthly Notices of the Royal Astronomical Society. 2020, 494(2): 3028-3036. doi:10.1093/mnras/staa855 |
Resumen: | Classical Cepheids represent the first step of the distance scale ladder. Claims of tension between the locally calculated Hubble constant and the values deduced from Planck’s results have sparked new interest in these distance calibrators. Cluster membership provides an independent distance measurement, as well as astrophysical context for studies of their stellar properties. Here, we report the discovery of a young open cluster in the vicinity of SV Vul, one of the most luminous Cepheids known in the Milky Way. Gaia DR2 data show that SV Vul is a clear astrometric and photometric member of the new cluster, which we name Alicante 13. Although dispersed, Alicante 13 is moderately well populated, and contains three other luminous stars, one early-A bright giant and two low-luminosity red supergiants. The cluster is about 30 Ma old at a nominal distance of 2.5 kpc. With this age, SV Vul should have a mass around 10 M⊙, in good accordance with its luminosity, close to the highest luminosity for Cepheids allowed by recent stellar models. |
Patrocinador/es: | This research is partially supported by the Spanish Ministerio de Ciencia e Innovación under grants AYA2015-68012-C2-2-P and PGC2018-093741-B-C21/C22 (MCI/AEI/FEDER, UE). |
URI: | http://hdl.handle.net/10045/106288 |
ISSN: | 0035-8711 (Print) | 1365-2966 (Online) |
DOI: | 10.1093/mnras/staa855 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1093/mnras/staa855 |
Aparece en las colecciones: | INV - Astrofísica Estelar - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Negueruela_etal_2020_MNRAS.pdf | 1,64 MB | Adobe PDF | Abrir Vista previa | |
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