期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 490, 期 3, 页码 4040-4059出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stz2787
关键词
asteroseismology; techniques: photometric; stars: chemically peculiar; stars: interiors; stars: variables: delta Scuti
资金
- NASA Explorer Program
- Danish National Re-search Foundation [DNRF106]
- ESA PRODEX [PEA 4000119301]
- Stellar Astrophysics Centre (SAC) at Aarhus University
- NASA [NAS5-2655]
- Danish National Research Foundation [DNRF106]
- FCT -Fundacao para a Ciencia e a Tecnologia
- FEDER through COMPETE2020 -Programa Operacional Competitividade e Internacionalizacao [UID/FIS/04434/2019, PTDC/FIS-AST/30389/2017, POCI-01-0145-FEDER-030389]
- FCT [CEECIND/02619/2017]
- Polish National Science Center (NCN) [2018/29/B/ST9/02803, 2015/18/A/ST9/00578, 2016/21/B/ST9/01126]
- Spanish public funds under Spanish Ministry of Science and Education [ESP201787676-2-2, ESP2015-65712-C5-5-R]
- NSF REU program [PHY-1359195]
- Lendulet Program of the Hungarian Academy of Sciences [LP2018-7/2018]
- National Research, Development and Innovation Fund of Hungary under the K16 funding scheme [115709]
- Spanish public funds [ESP2015-65712-C5-5-R, ESP2017-87676-2-2, ESP2017-87676-C5-5-R]
- 'Ramon y Cajal' program of the Spanish Ministry of Science and Education [RYC2012-09913]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [670519: MAMSIE]
- KULeuven Research Council [C16/18/005: PARADISE]
- Research Foundation Flanders (FWO) [G0H5416N]
- BELgian federal Science Policy Office (BELSPO) through PRODEX grant PLATO
- Spanish State Research Agency (AEI) [ESP2017-87676-C5-1-R, MDM-2017-0737]
- National Research, Development and Innovation Fund of Hungary [PD-123910, PD1717]
- Whitaker Foundation
- Natural Sciences and Engineering Research Council of Canada
- 'Programme National de Physique Stellaire' (PNPS) of CNRS/INSU - CEA
- CNES
- Polish NCN [2015/18/A/ST9/00578]
- Postdoc@MUNI project [CZ.02.2.69/0.0/0.0/16-027/0008360]
- State Agency for Research of the Spanish MCIU through the 'Center of Excellence Severo Ochoa' award [SEV-2017-0709]
- STFC [ST/N504348/1, ST/R000603/1]
- DGAPA-UNAM [PAPIIT IN100918]
- Ministry of Science and Technology of Thailand
- French Agence Nationale de la Recherche (ANR), under grant ESRR [ANR-16-CE31-0007-01]
- NSFC of China [11873084, 11521303]
- YunnanApplied Basic Research Projects [2017B008]
- Bulgarian NSF [DN 08-1/2016]
- Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO) [G0H5416N]
- National Aeronautics and Space Administration
- National Science Foundation
- [DN 18/13-12.12.2017]
- STFC [ST/R000603/1] Funding Source: UKRI
We present the first asteroseismic results for delta Scuti and gamma Doradus stars observed in Sectors 1 and 2 of the TESS mission. We utilize the 2-min cadence TESS data for a sample of 117 stars to classify their behaviour regarding variability and place them in the Hertzsprung-Russell diagram using Gaia DR2 data. Included within our sample are the eponymous members of two pulsator classes, gamma Doradus and SX Phoenicis. Our sample of pulsating intermediate-mass stars observed by TESS also allows us to confront theoretical models of pulsation driving in the classical instability strip for the first time and show that mixing processes in the outer envelope play an important role. We derive an empirical estimate of 74 per cent for the relative amplitude suppression factor as a result of the redder TESS passband compared to the Kepler mission using a pulsating eclipsing binary system. Furthermore, our sample contains many high-frequency pulsators, allowing us to probe the frequency variability of hot young d Scuti stars, which were lacking in the Kepler mission data set, and identify promising targets for future asteroseismic modelling. The TESS data also allow us to refine the stellar parameters of SX Phoenicis, which is believed to be a blue straggler.
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