Determining the seismic age of the young open cluster $\alpha$ Per using $\delta$ Scuti stars

Abstract

In this work we aim at constraining the age of the young open cluster Melotte 20, known as $\alpha$ 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 $\delta$ Scuti 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 $\delta$ Scuti 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 $\alpha$ 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.

arXiv comment16 pages, 14 figures, uses the open-source code MultiModes (see https://github.com/davidpamos/MultiModes). It will be published in MNRAS

References in corpus (41)

• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• Understanding the Lomb-Scargle Periodogram
• Kepler Mission Design, Realized Photometric Performance, and Early Science
• The Revised TESS Input Catalog and Candidate Target List
• Gaia Data Release 2: first stellar parameters from Apsis
• The Kepler characterization of the variability among A- and F-type stars. I. General overview
• Hybrid gamma Doradus - delta Scuti pulsators: New insights into the physics of the oscillations from Kepler observations
• SigSpec - I. Frequency- and Phase-Resolved Significance in Fourier Space
• {\em Gaia}-derived luminosities of {\em Kepler} A/F stars and the pulsator fraction across the δ Scuti instability strip
• Characterising the observational properties of δ Sct stars in the era of space photometry from the Kepler mission
• Keck Spectra of Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Boundary in the Alpha Persei Open Cluster
• Close companions around young stars
• Very regular high-frequency pulsation modes in young intermediate-mass stars
• Gaia Data Release 1. Open cluster astrometry: performance, limitations, and future prospects
• A 5D view of the Alpha Per, Pleiades, and Praesepe clusters
• Asteroseismic analysis of the CoRoT δ-Scuti star HD174936
• Observational $\Delta \nu$-$\bar{\rho }$ relation for $\delta$ Sct stars using eclipsing binaries and space photometry
• Measuring mean densities of delta Scuti stars with asteroseismology. Theoretical properties of large separations using TOUCAN
• The effects of moderately fast shellular rotation on adiabatic oscillations
• Accurate age determinations of several nearby open clusters containing magnetic Ap stars
• Precise surface gravities of $\delta$ Scuti stars from asteroseismology
• Mode density and frequency extraction in the delta Scuti star HD 50844
• The Mass and Age of Very Low Mass Members of the Open Cluster Alpha Persei
• A study of correlation between the oscillation amplitude and stellar parameters for delta Scuti stars in open clusters. Toward selection rules for delta Scuti stars oscillations
• Frequency regularities of acoustic modes and multi-colour mode identification in rapidly rotating stars
• FILOU oscillation code
• Five young $\delta$ Scuti stars in the Pleiades seen with Kepler/K2
• Unexpected series of regular frequency spacing of delta Scuti stars in the non-asymptotic regime -- I. The methodology
• Towards a photometric metallicity scale for open clusters
• MIARMA: An information preserving method for filling gaps in time series. Application to CoRoT light curves
• Determining the Best Method of Calculating the Large Frequency Separation For Stellar Models
• Evidence of chaotic modes in the analysis of four delta Scuti stars
• Study of rotational splittings in $\delta$~Scuti stars using pattern finding techniques
• Study of the low-order $\Delta \nu$-$\bar{\rho }$ relation for moderately-rotating $\delta$ Scuti stars and its impact on their characterisation
• Impact of gaps in the asteroseismic characterization of pulsating stars. I. On the efficiency of pre-whitening

Cited by in corpus (12)

• Untangling the Galaxy. IV. Empirical Constraints on Angular Momentum Evolution and Gyrochronology for Young Stars in the Field
• The IACOB project XII. A new grid of northern standards for the spectral classification of B-type stars
• Stellar Rotation and Structure of the $\alpha$ Persei Complex: When Does Gyrochronology Start to Work?
• Dating young open clusters using delta Scuti stars. Results for Trumpler 10 and Praesepe
• An empirical isochrone archive for nearby open clusters
• Identifying 850 delta Scuti pulsators in a narrow Gaia colour range with TESS 10-minute full-frame images
• Modelling of the scandium abundance evolution in AmFm stars
• Exploring the convective core of the high-amplitude $\delta$ Scuti star TIC 120857354 with asteroseismology
• Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed $\delta$ Scuti stars
• Characterizing bright $\delta$ Scuti pulsators using TESS lightcurves
• Catalog of Integrated-Light Star Cluster Light Curves in TESS
• Asteroseismology of 35 Kepler and TESS $\delta$ Scuti stars near the red edge of the instability strip. The limitations of $\delta$ Scuti stars for dating open clusters