TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars
Article
Bedding, Timothy R., Murphy, Simon J., Crawford, Courtney, Hey, Daniel R., Huber, Daniel, Kjeldsen, Hans, Li, Yaguang, Mann, Andrew W., Torres, Guillermo, White, Timothy R. and Zhou, George. 2023. "TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars
." The Astrophysical Journal Letters. 946 (1). https://doi.org/10.3847/2041-8213/acc17a
Article Title | TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Bedding, Timothy R., Murphy, Simon J., Crawford, Courtney, Hey, Daniel R., Huber, Daniel, Kjeldsen, Hans, Li, Yaguang, Mann, Andrew W., Torres, Guillermo, White, Timothy R. and Zhou, George |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 946 (1) |
Article Number | L10 |
Number of Pages | 9 |
Year | 2023 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/acc17a |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/acc17a/meta |
Abstract | We studied 89 A- and F-type members of the Pleiades open cluster, including five escaped members. We measured projected rotational velocities ( v sin i ) for 49 stars and confirmed that stellar rotation causes a broadening of the main sequence in the color-magnitude diagram. Using time-series photometry from NASA’s TESS Mission (plus one star observed by Kepler/K2), we detected ? Scuti pulsations in 36 stars. The fraction of Pleiades stars in the middle of the instability strip that pulsate is unusually high (over 80%), and their range of effective temperatures agrees well with theoretical models. On the other hand, the characteristics of the pulsation spectra are varied and do not correlate with stellar temperature, calling into question the existence of a useful ? max relation for ? Scutis, at least for young main-sequence stars. By including ? Scuti stars observed in the Kepler field, we show that the instability strip is shifted to the red with increasing distance by interstellar reddening. Overall, this work demonstrates the power of combining observations with Gaia and TESS for studying pulsating stars in open clusters. © 2023. The Author(s). Published by the American Astronomical Society. |
Keywords | Delta Scuti variable stars; Open star clusters ; Thesaurus concepts: Asteroseismology |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | University of Sydney |
School of Mathematics, Physics and Computing | |
University of Hawaii, United States | |
Aarhus University, Denmark | |
University of North Carolina, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Centre for Astrophysics |
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