2021A&A...655A..63Y


Query : 2021A&A...655A..63Y

2021A&A...655A..63Y - Astronomy and Astrophysics, volume 655A, 63-63 (2021/11-1)

TIC 308396022: δ Scuti-γ Doradus hybrid with large-amplitude radial fundamental mode and regular g-mode period spacing.

YANG T.-Z., ZUO Z.-Y., LI G., BEDDING T.R., MURPHY S.J. and JOYCE M.

Abstract (from CDS):

We analyse the pulsating behaviour of TIC 308396022, based on observations by the TESS mission. The star is a high-amplitude δ Sct star that shows a very rich amplitude spectrum using the 3-yr light curve. Among these frequencies, the strongest peak of f1 = 13.20362567(12) d–1 is identified as the radial fundamental mode, and we also find the first and second overtones (f2 and f3). In the low-frequency range (< 2.5 d–1), 22 peaks are identified as gravity modes, which show a regular period spacing of about 2460 s and have an angular degree of l = 1. The period spacing pattern does not show a significant downward trend, suggesting the star is rotating slowly. We note that this is a δ Sct-γ Dor hybrid star containing a high-amplitude radial fundamental mode and a regular g-mode period spacing pattern. With the O - C analysis, we find the star shows a significant time delay, implying that the star has a companion and it is likely to be a white dwarf. The history of possible mass transfer provides a great opportunity for testing the current theories of binary evolution, mass transfer, and pulsation.

Abstract Copyright: © ESO 2021

Journal keyword(s): stars: oscillations - stars: variables: delta Scuti - stars: individual: TIC 308396022

Simbad objects: 2

goto Full paper

goto View the references in ADS

Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 TYC 8928-1300-1 SB* 08 01 02.3729579592 -63 40 30.316670688   11.55 11.00     ~ 2 0
2 BD+47 2811 EB* 19 21 11.6187224352 +47 58 42.954779100   9.79 9.53   9.330 A5IV 56 0

To bookmark this query, right click on this link: simbad:objects in 2021A&A...655A..63Y and select 'bookmark this link' or equivalent in the popup menu


2023.02.02-18:16:11

© Université de Strasbourg/CNRS

    • Contact