Two massive Jupiter-sized exoplanets discovered with TESS

Tomasz Nowakowski is a member of the physics.org community.

Two new extrasolar planets have been detected using NASA's transiting exoplanet survey satellite. The new alien worlds are three times larger than the largest planet in the solar system. There is a finding on the arXiv pre-print repository.

The aim of the survey is to find transiting exoplanets, which are planets outside the solar system. There are over 5,700 candidate exoplanets that have been identified.

Astronomers led by Solne Ulmer-Moll of theGeneva Observatory in Switzerland have recently confirmed two more TOI planets. There are transit signals in the light curves of two stars. Follow-up observations proved the planetary nature of these signals.

The discovery photometry was collected with the space-based mission TESS and followed-up observations were carried out from the ground with the photometric facilityNGTS.

The TOI-5152 b is three times larger than Jupiter. Its parent star is at a distance of 0.31AU from it. The equilibrium temperature of the planet was 688 K. It is thought to be between 1.2 and 6.9 billion years old.

The TOI-5153 b's mass was estimated to be 3.26 Jupiter mass. The distance from the host to this exoplanet is less than 0.16AU. The equilibrium temperature of TOI-5153 b is 902 K, according to the astronomer. The sun is assumed to be over five billion years old. The distance to this planetary system is over one thousand years.

Both TOI-5152 b and TOI-5153 b are large alien worlds. Their heavy element content is in line with the mass-metallicity relation of gas giants. The authors of the paper said that the two planets are ideal targets for further observations.

The researchers concluded that the Jupiters were valuable targets for follow-up studies of the planetary atmosphere and measurement of the spin-orbit angle of the system.

More information: S. Ulmer-Moll et al, Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b. arXiv:2207.03911v1 [astro-ph.EP], arxiv.org/abs/2207.03911?context=astro-ph

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