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Solar-like oscillations and ellipsoidal variations detected in binary system 12 Boötis
TESS light curves of 12 Boo from the PDCSAP pipeline (blue) and our custom reduction (orange, offset). The researchers subtracted a slowly-varying trend (black) before computing the power spectrum. Credit: Ball et al., 2022.

Astronomers using NASA's Transiting Exoplanet Survey Satellite (TESS) have detected solar-like oscillations and ellipsoidal variations in the light curve of a system called 12 Botis. There is a paper on the arXiv pre-print server.

Our sun is a cool star with an effective temperature of 6,400 K. These are oscillations that are similar to the solar system. It's important to find and investigate such oscillations for testing.

There is a bright system in the constellation Botes located some 122 light years away from the Earth. Two stars with a mass of 888-492-0 888-492-0 888-492-0's are in this picture.

According to a group of researchers led by Warrick H. Ball, 12 Botis exhibits solar-like oscillations and ellipsoidal variations. TESS light curves were analyzed in early 2020.

The analysis of the TESS light curve of 12 Boo includes the first detection of solar-like oscillations and ellipsoidal variations, according to the paper.

The team made a marginal detection by analyzing TESS light curves. The scientists were able to recover a number of days of data near the beginning of TESS's journey.

The paper states that the solar-like oscillations turned out to be not clear enough to measure individual frequencies, which could shed more light on the nature of the system. The astronomer combined global asteroseismic parameters and a precise fit to the SED to give new constraints on the known properties of thebinary.

The star is 1.9 times larger than the sun and has a higher luminosity than the sun. The stars are 2.66 billion years old and metallic.

The authors of the study said that their results improved the properties of 12 Boo. In order to understand its individual mode frequencies, more sophisticated analysis of the light curve and power spectrum is needed.

More information: Warrick H. Ball et al, Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis. arXiv:2208.02302v1 [astro-ph.SR],

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