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dc.contributor.author
Chen, Jianxing
dc.contributor.author
Ferraro, Francesco R.
dc.contributor.author
Cadelano, Mario
dc.contributor.author
Salaris, Maurizio
dc.contributor.author
Lanzoni, Barbara
dc.contributor.author
Pallanca, Cristina
dc.contributor.author
Althaus, Leandro Gabriel
dc.contributor.author
Dalessandro, Emanuele
dc.date.available
2022-02-21T14:19:10Z
dc.date.issued
2021-11
dc.identifier.citation
Chen, Jianxing; Ferraro, Francesco R.; Cadelano, Mario; Salaris, Maurizio; Lanzoni, Barbara; et al.; Slowly cooling white dwarfs in M13 from stable hydrogen burning; Nature Research; Nature Astronomy; 5; 11; 11-2021; 1170-1177
dc.identifier.uri
http://hdl.handle.net/11336/152371
dc.description.abstract
White dwarfs (WDs) are the final evolutionary product of the vast majority of stars in the Universe. They are electron-degenerate structures characterized by no stable thermonuclear activity, and their evolution is generally described as a pure cooling process. Their cooling rate is adopted as cosmic chronometer to constrain the age of several Galactic populations, including the disk, globular and open clusters. By analysing high-resolution photometric data of two very similar Galactic globular clusters (M3 and M13), we find a clear-cut and unexpected overabundance of bright WDs in M13. Theoretical models suggest that, consistent with the horizontal branch morphology, this overabundance is due to a slowing down of the cooling process in ~70% of the WDs in M13, caused by stable thermonuclear burning in their residual hydrogen-rich envelope. The presented observational evidence of quiescent thermonuclear activity occurring in cooling WDs brings new attention on the use of the WD cooling rate as cosmic chronometer for low-metallicity environments.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Nature Research
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
white dwarfs
dc.subject.classification
Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Slowly cooling white dwarfs in M13 from stable hydrogen burning
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-02-04T13:29:48Z
dc.identifier.eissn
2397-3366
dc.journal.volume
5
dc.journal.number
11
dc.journal.pagination
1170-1177
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Chen, Jianxing. Universidad de Bologna; Italia
dc.description.fil
Fil: Ferraro, Francesco R.. Universidad de Bologna; Italia
dc.description.fil
Fil: Cadelano, Mario. Astrophysics and Space Science Observatory of Bologna; Italia
dc.description.fil
Fil: Salaris, Maurizio. Liverpool John Moores University; Reino Unido
dc.description.fil
Fil: Lanzoni, Barbara. Universidad de Bologna; Italia
dc.description.fil
Fil: Pallanca, Cristina. Universidad de Bologna; Italia
dc.description.fil
Fil: Althaus, Leandro Gabriel. 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
dc.description.fil
Fil: Dalessandro, Emanuele. Astrophysics and Space Science Observatory of Bologna; Italia
dc.journal.title
Nature Astronomy
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1038/s41550-021-01445-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41550-021-01445-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2109.02306
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