TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars
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 phot...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/acc17a |
| _version_ | 1827830901486125056 |
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| author | Timothy R. Bedding Simon J. Murphy Courtney Crawford Daniel R. Hey Daniel Huber Hans Kjeldsen Yaguang Li Andrew W. Mann Guillermo Torres Timothy R. White George Zhou |
| author_facet | Timothy R. Bedding Simon J. Murphy Courtney Crawford Daniel R. Hey Daniel Huber Hans Kjeldsen Yaguang Li Andrew W. Mann Guillermo Torres Timothy R. White George Zhou |
| author_sort | Timothy R. Bedding |
| collection | DOAJ |
| description | 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 δ 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 ${\nu }_{\max }$ relation for δ Scutis, at least for young main-sequence stars. By including δ 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. |
| first_indexed | 2024-03-12T04:36:13Z |
| format | Article |
| id | doaj.art-97fdaf01fb2641378068af1bb2522159 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T04:36:13Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-97fdaf01fb2641378068af1bb25221592023-09-03T09:55:30ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019461L1010.3847/2041-8213/acc17aTESS Observations of the Pleiades Cluster: A Nursery for δ Scuti StarsTimothy R. Bedding0https://orcid.org/0000-0001-5222-4661Simon J. Murphy1https://orcid.org/0000-0002-5648-3107Courtney Crawford2https://orcid.org/0000-0002-7654-7438Daniel R. Hey3https://orcid.org/0000-0003-3244-5357Daniel Huber4https://orcid.org/0000-0001-8832-4488Hans Kjeldsen5https://orcid.org/0000-0002-9037-0018Yaguang Li6https://orcid.org/0000-0003-3020-4437Andrew W. Mann7https://orcid.org/0000-0003-3654-1602Guillermo Torres8https://orcid.org/0000-0002-5286-0251Timothy R. White9https://orcid.org/0000-0002-6980-3392George Zhou10https://orcid.org/0000-0002-4891-3517Sydney Institute for Astronomy , School of Physics, University of Sydney NSW 2006, Australia ; tim.bedding@sydney.edu.auCentre for Astrophysics, University of Southern Queensland , Toowoomba, QLD 4350, AustraliaSydney Institute for Astronomy , School of Physics, University of Sydney NSW 2006, Australia ; tim.bedding@sydney.edu.auInstitute for Astronomy, University of Hawai‘i , Honolulu, HI 96822, USAInstitute for Astronomy, University of Hawai‘i , Honolulu, HI 96822, USAStellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University , DK-8000 Aarhus C, DenmarkSydney Institute for Astronomy , School of Physics, University of Sydney NSW 2006, Australia ; tim.bedding@sydney.edu.auDepartment of Physics and Astronomy, University of North Carolina at Chapel Hill , Chapel Hill, NC, USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USASydney Institute for Astronomy , School of Physics, University of Sydney NSW 2006, Australia ; tim.bedding@sydney.edu.auCentre for Astrophysics, University of Southern Queensland , Toowoomba, QLD 4350, AustraliaWe 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 δ 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 ${\nu }_{\max }$ relation for δ Scutis, at least for young main-sequence stars. By including δ 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.https://doi.org/10.3847/2041-8213/acc17aAsteroseismologyOpen star clustersDelta Scuti variable stars |
| spellingShingle | Timothy R. Bedding Simon J. Murphy Courtney Crawford Daniel R. Hey Daniel Huber Hans Kjeldsen Yaguang Li Andrew W. Mann Guillermo Torres Timothy R. White George Zhou TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars The Astrophysical Journal Letters Asteroseismology Open star clusters Delta Scuti variable stars |
| title | TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars |
| title_full | TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars |
| title_fullStr | TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars |
| title_full_unstemmed | TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars |
| title_short | TESS Observations of the Pleiades Cluster: A Nursery for δ Scuti Stars |
| title_sort | tess observations of the pleiades cluster a nursery for δ scuti stars |
| topic | Asteroseismology Open star clusters Delta Scuti variable stars |
| url | https://doi.org/10.3847/2041-8213/acc17a |
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