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Anders Zinck Justesen

The first view of δ Scuti and γ Doradus stars with the TESS mission

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  • V. Antoci
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  • J. Daszynska-Daszkiewicz, Uniwersytet Wroclawski, University of Wroclaw, Inst Astron
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  • F. Kahraman Alicavus, Canakkale Onsekiz Mart Univ, Canakkale Onsekiz Mart University, Fac Sci & Arts, Phys Dept
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  • K. Kotysz, Uniwersytet Wroclawski, University of Wroclaw, Inst Astron
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  • J. M. Matthews, Univ British Columbia, University of British Columbia, Dept Phys & Astron
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  • J. Monster, Aarhus Univ, Aarhus University, Dept Phys & Astron, Stellar Astrophys Ctr
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  • E. Niemczura, Uniwersytet Wroclawski, University of Wroclaw, Inst Astron
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  • E. Paunzen, Masaryk Univ, Masaryk University Brno, Dept Theoret Phys & Astrophys
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  • J. P. Sanchez Arias, UNLP, National University of La Plata, Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), CONICET, Inst Astrofis La Plata
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  • A. Pigulski, Uniwersytet Wroclawski, University of Wroclaw, Inst Astron
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  • J. Pepper, Lehigh Univ, Lehigh University, Dept Phys
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  • T. Richey-Yowell, Arizona State Univ, Arizona State University, Sch Earth & Space Explorat
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  • H. Safari, Univ Zanjan, Fac Sci, Dept Phys
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  • S. Seager, MIT, Massachusetts Institute of Technology (MIT), Dept Earth Atmospher & Planetary Sci
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  • B. Smalley, MIT, Massachusetts Institute of Technology (MIT), Dept Aeronaut & Astronaut
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  • T. Shutt, Keele Univ, Keele University, Lennard Jones Labs, Astrophys Grp
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  • A. Sodor, MTA CSFK, Hungarian Academy of Sciences, Konkoly Observ
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  • J. -C. Suarez
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  • T. Wu, Chinese Acad Sci, Chinese Academy of Sciences, Key Lab Struct & Evolut Celestial Objects, Natl Astron Observat Yunnan Observ
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  • K. Zwintz, Chinese Acad Sci, Chinese Academy of Sciences, Ctr Astron Mega Sci
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  • S. Barcelo Forteza, Univ Innsbruck, University of Innsbruck, Inst Astro & Teilchenphys
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  • E. Brunsden, Keele Univ, Keele University, Lennard Jones Labs, Astrophys Grp
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  • D. L. Buzasi, ESA ESAC, CSIC - Centro de Astrobiologia (INTA), European Space Agency, Consejo Superior de Investigaciones Cientificas (CSIC), CSIC INTA, Ctr Astrobiol, Dept Astrofis
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  • S. Chowdhury, Polish Acad Sci, Polish Academy of Sciences, Nicolaus Copernicus Astron Ctr
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  • P. De Cat, Florida Gulf Coast Univ, Florida Gulf Coast University, Florida State University System, Dept Chem & Phys
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  • J. A. Evans, MIT, Massachusetts Institute of Technology (MIT), Dept Aeronaut & Astronaut
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  • J. A. Guzik, Penn State Univ, Pennsylvania Commonwealth System of Higher Education (PCSHE), Pennsylvania State University, Pennsylvania State University - University Park, Davey Lab 525, Ctr Exoplanets & Habitable Worlds
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  • N. Jevtic, Los Alamos Natl Lab, Los Alamos National Laboratory, United States Department of Energy (DOE)
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  • P. Lampens, Florida Gulf Coast Univ, Florida Gulf Coast University, Florida State University System, Dept Chem & Phys
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  • M. Lares Martiz, CSIC, Consejo Superior de Investigaciones Cientificas (CSIC), CSIC - Instituto de Astrofisica de Andalucia (IAA), Inst Astrofis Andalucia
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  • C. Lovekin, Bloomsburg Univ, Pennsylvania State System of Higher Education (PASSHE), Bloomsburg University of Pennsylvania, Phys Dept
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  • G. Li, Univ Sydney, University of Sydney, Sydney Inst Astron SIfA, Sch Phys
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  • G. M. Mirouh, Mt Allison Univ, Mount Allison University, Phys Dept
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  • D. Mkrtichian, Univ Surrey, University of Surrey, Fac Engn & Phys Sci, Astrophys Res Grp
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  • M. J. P. F. G. Monteiro, Natl Astron Res Inst Thailand
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  • J. M. Nemec, Univ Porto, Universidade do Porto, Dept Fis & Astron, Fac Ciencias
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  • R. -M. Ouazzani, Univ Paris, Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Sorbonne Universite, Universite de Paris, University of Paris Diderot, Sorbonne Univ Site, Observatoire Paris, LESIA,Univ PSL,CNRS
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  • J. Pascual-Granado, CSIC, Consejo Superior de Investigaciones Cientificas (CSIC), CSIC - Instituto de Astrofisica de Andalucia (IAA), Inst Astrofis Andalucia
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  • D. R. Reese, Univ Paris, Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, Sorbonne Universite, Universite de Paris, University of Paris Diderot, Sorbonne Univ Site, Observatoire Paris, LESIA,Univ PSL,CNRS
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  • M. Rieutord, Camosun Coll, Dept Phys & Astron
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  • J. R. Rodon, CSIC, Consejo Superior de Investigaciones Cientificas (CSIC), CSIC - Instituto de Astrofisica de Andalucia (IAA), Inst Astrofis Andalucia
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  • M. Skarka, Masaryk Univ, Masaryk University Brno, Dept Theoret Phys & Astrophys
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  • P. Sowicka, Polish Acad Sci, Polish Academy of Sciences, Nicolaus Copernicus Astron Ctr
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  • I. Stateva, Bulgarian Acad Sci, Bulgarian Academy of Sciences, NAO
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  • R. Szabo, MTA CSFK, Hungarian Academy of Sciences, Konkoly Observ
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  • W. W. Weiss, Univ Vienna, University of Vienna, Inst Astrophys

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.

OriginalsprogEngelsk
TidsskriftMonthly Notices of the Royal Astronomical Society
Vol/bind490
Nummer3
Sider (fra-til)4040-4059
Antal sider20
ISSN0035-8711
DOI
StatusUdgivet - dec. 2019

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