A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020
Yükleniyor...
Tarih
2021
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Oxford University Press
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
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
Açıklama
Anahtar Kelimeler
Binaries: General, Stars: İndividual: TIC 63328020, Stars: Oscillations
Kaynak
Monthly Notices of the Royal Astronomical Society
WoS Q Değeri
Q1
Scopus Q Değeri
Cilt
503
Sayı
1
Künye
Rappaport, S. A., Kurtz, D. W., Handler, G., Jones, D., Nelson, L. A., Saio, H., . . . Kahraman Aliçavuş, F. (2021). A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020. Monthly Notices of the Royal Astronomical Society, 503(1), 254-269. doi:10.1093/mnras/stab336
