Five young δ Scuti stars in the Pleiades seen with Kepler/K2

Murphy, Simon J. and Bedding, Timothy R. and White, Timothy R. and Li, Yaguang and Hey, Daniel and Reese, Daniel and Joyce, Meridith (2022) Five young δ Scuti stars in the Pleiades seen with Kepler/K2. Monthly Notices of the Royal Astronomical Society, 511 (4). pp. 5718-5729. ISSN 0035-8711

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We perform mode identification for five δ Scuti stars in the Pleiades star cluster, using custom light curves from K2 photometry. By creating echelle diagrams, we identify radial and dipole mode ridges, comprising a total of 28 radial and 16 dipole modes across the five stars. We also suggest possible identities for those modes that lie offset from the radial and dipole ridges. We calculate non-rotating stellar pulsation models to verify our mode identifications, finding good agreement within the age and metallicity constraints of the cluster. We also find that for all stars, the least dense models are preferred, reflecting the lower density of these oblate, rotating stars. Three of the five stars show rotationally split multiplets. We conclude that the sample shows promise for asteroseismic rotation rates, masses, and ages with rotating models in the future. Our preliminary modelling also indicates some sensitivity to the helium abundance.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: File reproduced in accordance with the copyright policy of the publisher/author.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 17 Jul 2022 22:37
Last Modified: 27 Sep 2022 04:15
Uncontrolled Keywords: asteroseismology; stars: evolution; stars: oscillations; stars: variables: δ Scuti; star clusters: individual: Pleiades; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
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