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

Antoci, V, Cunha, M S, Bowman, D M, Murphy, S J, Kurtz, D W, Bedding, T R, Borre, C C, Christophe, S, Daszyńska-Daszkiewicz, J, Fox-Machado, L , Hernández, A García, Ghasemi, H, Handberg, R, Hansen, H, Hasanzadeh, A, Houdek, G, Johnston, C, Justesen, A B, Alicavus, F Kahraman, Kotysz, K, Latham, D, Matthews, J M, Mønster, J, Niemczura, E, Paunzen, E, Arias, J P Sánchez, Pigulski, A, Pepper, J, Richey-Yowell, T, Safari, H, Seager, S, Smalley, B, Shutt, T, Sódor, A, Suárez, J-C, Tkachenko, A, Wu, T, Zwintz, K, Forteza, S Barceló, Brunsden, E, Bognár, Z, Buzasi, D L, Chowdhury, S, De Cat, P, Evans, J A, Guo, Z, Guzik, J A, Jevtic, N, Lampens, P, Martiz, M Lares, Lovekin, C, Li, G, Mirouh, G M, Mkrtichian, D, Monteiro, M J P F G, Nemec, J M, Ouazzani, R-M, Pascual-Granado, J, Reese, D R, Rieutord, M, Rodon, J R, Skarka, M, Sowicka, P, Stateva, I, Szabó, R and Weiss, W W (2019) The first view of δ Scuti and γ Doradus stars with the TESS mission Monthly Notices of the Royal Astronomical Society.

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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 utilise 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% 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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Antoci, V
Cunha, M S
Bowman, D M
Murphy, S J
Kurtz, D W
Bedding, T R
Borre, C C
Christophe, S
Daszyńska-Daszkiewicz, J
Fox-Machado, L
Hernández, A García
Ghasemi, H
Handberg, R
Hansen, H
Hasanzadeh, A
Houdek, G
Johnston, C
Justesen, A B
Alicavus, F Kahraman
Kotysz, K
Latham, D
Matthews, J M
Mønster, J
Niemczura, E
Paunzen, E
Arias, J P Sánchez
Pigulski, A
Pepper, J
Richey-Yowell, T
Safari, H
Seager, S
Smalley, B
Shutt, T
Sódor, A
Suárez, J-C
Tkachenko, A
Wu, T
Zwintz, K
Forteza, S Barceló
Brunsden, E
Bognár, Z
Buzasi, D L
Chowdhury, S
De Cat, P
Evans, J A
Guo, Z
Guzik, J A
Jevtic, N
Lampens, P
Martiz, M Lares
Lovekin, C
Li, G
Mirouh, G Mg.mirouh@surrey.ac.uk
Mkrtichian, D
Monteiro, M J P F G
Nemec, J M
Ouazzani, R-M
Pascual-Granado, J
Reese, D R
Rieutord, M
Rodon, J R
Skarka, M
Sowicka, P
Stateva, I
Szabó, R
Weiss, W W
Date : 7 October 2019
Funders : European Union's Horizon 2020, Science and Technology Facilities Council (STFC)
DOI : 10.1093/mnras/stz2787
Grant Title : Research and innovation programme
Copyright Disclaimer : © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record V Antoci, M S Cunha, D M Bowman, S J Murphy, D W Kurtz, T R Bedding, C C Borre, S Christophe, J Daszyńska-Daszkiewicz, L Fox-Machado, A García Hernández, H Ghasemi, R Handberg, H Hansen, A Hasanzadeh, G Houdek, C Johnston, A B Justesen, F Kahraman Alicavus, K Kotysz, D Latham, J M Matthews, J Mønster, E Niemczura, E Paunzen, J P Sánchez Arias, A Pigulski, J Pepper, T Richey-Yowell, H Safari, S Seager, B Smalley, T Shutt, A Sódor, J-C Suárez, A Tkachenko, T Wu, K Zwintz, S Barceló Forteza, E Brunsden, Z Bognár, D L Buzasi, S Chowdhury, P De Cat, J A Evans, Z Guo, J A Guzik, N Jevtic, P Lampens, M Lares Martiz, C Lovekin, G Li, G M Mirouh, D Mkrtichian, M J P F G Monteiro, J M Nemec, R-M Ouazzani, J Pascual-Granado, D R Reese, M Rieutord, J R Rodon, M Skarka, P Sowicka, I Stateva, R Szabó, W W Weiss, The first view of δ Scuti and γ Doradus stars with the TESS mission, Monthly Notices of the Royal Astronomical Society, is available online at: https://doi.org/10.1093/mnras/stz2787.
Uncontrolled Keywords : Asteroseismology, techniques: photometric: TESS. Binaries: chemically peculiar. Stars: interiors. Stars: variables: δ Scuti: variables: γ Doradus.
Depositing User : Clive Harris
Date Deposited : 08 Oct 2019 10:05
Last Modified : 08 Oct 2019 10:05
URI: http://epubs.surrey.ac.uk/id/eprint/852887

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