The first view of δ Scuti and γ Doradus stars with the TESS mission
V AntociStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkM S CunhaInstituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, PortugalD M BowmanInstitute of Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, BelgiumS J MurphyStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkD W KurtzJeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UKT. R. BeddingStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkC C BorreStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkS ChristopheLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, F-92195 Meudon, FranceJ Daszyńska-DaszkiewiczInstytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, PL-51-622 Wrocław, PolandL Fox-MachadoInstituto de Astronomía, Universidad Nacional Autónoma de México, Ap. P. 877, Ensenada, BC 22860, MexicoAntonio García HernándezDepartamento Física Teórica y del Cosmos, Universidad de Granada, Campus de Fuentenueva s/n, E-18071 Granada, SpainHamed GhasemiDepartment of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, IranR. HandbergStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkH HansenStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkA HasanzadehDepartment of Physics, Faculty of Science, University of Zanjan, P.O. Box 45195-313 Zanjan, IranG. HoudekStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkC JohnstonInstitute of Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, BelgiumA B JustesenStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkF Kahraman AlicavusNicolaus Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warsaw, PolandK KotyszInstytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, PL-51-622 Wrocław, PolandD LathamCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAJ M MatthewsDepartment of Physics and Astronomy, University of British Columbia, Vancouver, CanadaJ MønsterStellar Astrophysics Centre, Ny Munkegade 120, D-8000 Aarhus, DenmarkE NiemczuraInstytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, PL-51-622 Wrocław, PolandE. PaunzenDepartment of Theoretical Physics and Astrophysics, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech RepublicJ P Sánchez AriasInstituto de Astrofísica La Plata, CONICET-UNLP, Paseo del Bosque s/n, 1900 La Plata, ArgentinaA PigulskiInstytut Astronomiczny, Uniwersytet Wrocławski, Kopernika 11, PL-51-622 Wrocław, PolandJ PepperDepartment of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015, USAT Richey-YowellDepartment of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015, USAHossein SafariDepartment of Physics, Faculty of Science, University of Zanjan, P.O. Box 45195-313 Zanjan, IranS SeagerDepartment of Aeronautics and Astronautics, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USAB. SmalleyAstrophysics Group, Keele University, Staffordshire ST5 5BG, UKT ShuttDepartment of Physics, University of York, Heslington, York YO10 5DD, UKA Sódor22 MTA CSFK Lendület Near-Field Cosmology Research GroupJ. C. SuárezDepartamento Física Teórica y del Cosmos, Universidad de Granada, Campus de Fuentenueva s/n, E-18071 Granada, SpainA TkachenkoInstitute of Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, BelgiumT WuCenter for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P.R. ChinaK ZwintzInstitut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, AustriaS Barceló FortezaDepartamento de Astrofísica, Centro de Astrobiología (CSIC-INTA), ESAC, Camino Bajo del Castillo s/n, E-28692 Madrid, SpainE BrunsdenDepartment of Physics, University of York, Heslington, York YO10 5DD, UKZ Bognár22 MTA CSFK Lendület Near-Field Cosmology Research GroupD L BuzasiDepartment of Chemistry and Physics, Florida Gulf Coast University, 10501 FGCU Blvd., Fort Myers, FL 33965, USAS ChowdhuryNicolaus Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warsaw, PolandP De CatRoyal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, BelgiumJ A EvansAstrophysics Group, Keele University, Staffordshire ST5 5BG, UKZ GuoCenter for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA 16802, USAJ A GuzikLos Alamos National Laboratory, MS T-082, Los Alamos, NM 87545, USAN JevticPhysics Department, Bloomsburg University, 200 E 2nd St, Bloomsburg, PA 17815, USAP LampensRoyal Observatory of Belgium, Ringlaan 3, B-1180 Brussel, BelgiumM Lares MartizInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, SpainC LovekinPhysics Department, Mount Allison University, Sackville, NB E4L 1E6, CanadaG LiSydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, AustraliaG M MirouhAstrophysics Research Group, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, UKD MkrtichianNational Astronomical Research Institue of Thailand, 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai 50180, ThailandM J P F G MonteiroDepartamento de Física e Astronomia, Faculdade de Ciências da Universidade do Porto, Porto, PortugalJ. M. NemecDepartment of Physics & Astronomy, Camosun College, Victoria, BC, CanadaR-M OuazzaniLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, F-92195 Meudon, FranceJ. Pascual-GranadoInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, SpainD R ReeseLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, F-92195 Meudon, FranceM RieutordIRAP, Université de Toulouse, CNRS, UPS, CNES, 14 Avenue Edouard Belin, F-31400 Toulouse, FranceJ R RodonInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, SpainMarek SkarkaAstronomical Institute, Czech Academy of Sciences, Fričova 298, CZ-25165 Ondřejov, Czech RepublicP SowickaNicolaus Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warsaw, PolandI StatevaInstitute of Astronomy and NAO, Bulgarian Academy of Sciences, Blvd.Tsarigradsko Chaussee 72, Sofia 1784, BulgariaR. Szabó22 MTA CSFK Lendület Near-Field Cosmology Research GroupW W WeissInstitute for Astrophysics, University of Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria
2019en
ABI
Аннотация
ABSTRACT We present the first asteroseismic results for δ Scuti and γ 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, γ 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 δ 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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