Determining the seismic age of the young open cluster αPer using δScuti stars
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AuthorPamos Ortega, David; García Hernández, Antonio; Suárez Yanes, Juan Carlos; Pascual Granado, Javier; Barceló Forteza, Sebatiá
Oxford University Press
MiscellaneousAsteroseismologyAstronimical data basesSoftware: data analysisStars: rotationStars: variables: ScutiGalaxies: star formation
David Pamos Ortega, Antonio García Hernández, Juan Carlos Suárez, Javier Pascual Granado, Sebastià Barceló Forteza, José Ramón Rodón, Determining the seismic age of the young open cluster α Per using δ Scuti stars, Monthly Notices of the Royal Astronomical Society, Volume 513, Issue 1, June 2022, Pages 374–388, [https://doi.org/10.1093/mnras/stac864]
SponsorshipProject 'Contribution of the UGR MCNI/AEI/PID2019-107061GB-C64; Spanish public funds for research PID2019-107061GB-C64; Spanish Ministry of Science and Education; European Regional Development Fund/Junta de Andalucia-Consejeria de Economia y Conocimiento' E-FQM-041-UGR18; Universidad de Granada; Spanish public funds for research from project PID2019-107061GB-C63; Programas Estatales de Generacion de Conocimiento y Fortalecimiento Cientifico y Tecnologico del Sistema de I+D+i y de I+D + i Orientada a los Retos de la Sociedad'; State Agency for Research of the Spanish MCIU through the `Center of Excellence Severo Ochoa' award SEV-2017-0709; PID2019-107061GB-C64; PID2019-107061GB-C61; National Aeronautics & Space Administration (NASA); Association of Universities for Research in Astronomy, Inc., under NASA NAS 5-26555
In this work, we aim at constraining the age of the young open cluster Melotte 20, known as α Per, using seismic indices. The method consists of the following steps: (1) Extract the frequency content of a sample of stars in the field of an open cluster. (2) Search for possible regularities in the frequency spectra of δ Sct stars candidates, using different techniques, such as the Fourier transform, the autocorrelation function, the histogram of frequency differences and the échelle diagram. (3) Constrain the age of the selected stars by both the physical parameters and seismic indices by comparing them with a grid of asteroseismic models representative of δ Sct stars. (4) Find possible common ages between these stars to determine the age of the cluster. We performed the pulsation analysis with MultiModes, a rapid, accurate and powerful open-source code, which is presented in this paper. The result is that the age of α Per could be between 96 and 100 Myr. This is an improvement over different techniques in the past. We therefore show that space astroseismology is capable of taking important steps in the dating of young open clusters.