A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020

Author:

Rappaport S A1,Kurtz D W23ORCID,Handler G4,Jones D56ORCID,Nelson L A7,Saio H8,Fuller J9ORCID,Holdsworth D L3,Vanderburg A10,Žák J11125,Skarka M1113ORCID,Aiken J7,Maxted P F L14,Stevens D J15,Feliz D L1617,Aliçavuş F Kahraman1819

Affiliation:

1. Department of Physics, and Kavli Institute for Astrophysics and Space Research, M.I.T., Cambridge, MA 02139, USA

2. Centre for Space Research, Physics Department, North West University, Mahikeng 2745, South Africa

3. Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK

4. Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716, Warszawa, Poland

5. Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain

6. Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain

7. Department of Physics and Astronomy, Bishop’s University, 2600 College St., Sherbrooke, QC J1M 1Z7

8. Astronomical Institute, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

9. Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA

10. Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA

11. Department of Theoretical Physics and Astrophysics, Masaryk Univesity, Kotlářská 2, 60200 Brno, Czech Republic

12. ESO, Karl-Schwarzschild-str. 2, D-85748 Garching, Germany

13. Astronomical Institute, Czech Academy of Sciences, Fričova 298, 25165, Ondřejov, Czech Republic

14. Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK

15. Department of Astronomy & Astrophysics and Center for Exoplanets and Habitable Worlds, PSU, 525 Davey Lab, University Park, PA 16802, USA

16. Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA

17. Department of Physics, Fisk University, 1000 17th Avenue North, Nashville, TN 37208, USA

18. Çanakkale Onsekiz Mart University, Faculty of Sciences and Arts, Physics Department, 17100, Çanakkale, Turkey

19. Çanakkale Onsekiz Mart University, Astrophysics Research Center and Ulupõnar Observatory, TR-17100, Çanakkale, Turkey

Abstract

Abstract We report the discovery of the third tidally tilted pulsator, TIC 63328020. Observations with the TESS satellite reveal binary eclipses with an orbital period of 1.1057 d, and δ Scuti-type pulsations with a mode frequency of 21.09533 d−1. This pulsation exhibits a septuplet of orbital sidelobes as well as a harmonic quintuplet. Using the oblique pulsator model, the primary oscillation is identified as a sectoral dipole mode with l = 1, |m| = 1. We find the pulsating star to have M1 ≃ 2.5 M⊙, R1 ≃ 3 R⊙, and Teff, 1 ≃ 8000 K, while the secondary has M2 ≃ 1.1 M⊙, R2 ≃ 2 R⊙, and Teff, 2 ≃ 5600 K. Both stars appear to be close to filling their respective Roche lobes. The properties of this binary as well as the tidally tilted pulsations differ from the previous two tidally tilted pulsators, HD74423 and CO Cam, in important ways. We also study the prior history of this system with binary evolution models and conclude that extensive mass transfer has occurred from the current secondary to the primary.

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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1. Characterization of the δ Scuti eclipsing binary KIC 4851217 and its tertiary companion as well as detection of tidally tilted pulsations;Monthly Notices of the Royal Astronomical Society;2024-08-02

2. A comprehensive study of an oscillating eclipsing Algol: Y Camelopardalis;Publications of the Astronomical Society of Japan;2024-06-12

3. HD 12098: a highly distorted dipole mode in an obliquely pulsating roAp star;Monthly Notices of the Royal Astronomical Society;2024-02-09

4. TIC 184 743 498: the first tri-axial stellar pulsator;Monthly Notices of the Royal Astronomical Society;2024-01-11

5. Single-lined eclipsing binaries with δ Scuti components: GQ Dra, RR Lep, and TYC 683-640-1;Monthly Notices of the Royal Astronomical Society;2023-11-09

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