The breakdown of current gyrochronology as evidenced by old coeval stars

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dc.contributor.authorSilva-Beyer, Joaquin
dc.contributor.authorGodoy-Rivera, Diego
dc.contributor.authorChaname, Julio
dc.date.accessioned2025-01-20T20:08:05Z
dc.date.available2025-01-20T20:08:05Z
dc.date.issued2023
dc.description.abstractGyrochronology can yield useful ages for field main-sequence stars, a regime where other techniques are problematic. Typically, gyrochronology relations are calibrated using young (& LSIM;2 Gyr) clusters, but the constraints at older ages are scarce, making them potentially inaccurate and imprecise. In order to test the performance of existing relations, we construct samples of stellar pairs with coeval components, for a range of ages and with available rotation periods. These include randomly paired stars in clusters, and wide binaries in the Kepler field. We design indicators that, based on the measured rotation periods and expectations from gyrochronology, quantify the (dis)agreement between the coeval pairs and the gyrochronology calibrations under scrutiny. Our results show that wide binaries and cluster members are in better concordance with gyrochronology than samples of randomly paired field stars, confirming that the relations have predicting power. However, the agreement with the examined relations decreases for older stars, revealing a degradation of the examined relations with age, in agreement with recent works. This highlights the need for novel empirical constraints at older ages that may allow revised calibrations. Notably, using coeval stars to test gyrochronology poses the advantage of circumventing the need for age determinations while simultaneously exploiting larger samples at older ages. Our test is independent of any specific age-rotation relation, and it can be used to evaluate future spin-down models. In addition, taking gyrochronology at face value, we note that our results provide new empirical evidence that the components of field wide binaries are indeed coeval.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad1803
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad1803
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91866
dc.identifier.wosidWOS:001024093300011
dc.issue.numero4
dc.language.isoen
dc.pagina.final5961
dc.pagina.inicio5947
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectbinaries: visual
dc.subjectstars: evolution
dc.subjectstars: fundamental parameters
dc.subjectstars: rotation
dc.titleThe breakdown of current gyrochronology as evidenced by old coeval stars
dc.typeartículo
dc.volumen523
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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