Tomasz Nowakowski is a writer for Phys.org.
A new Jupiter-sized extrasolar world has been detected by the Pennsylvania State University. The exoplanet, named TOI 3757 b, is slightly larger than Jupiter but less massive than the solar system's biggest planet. The paper was published on arXiv.org.
TESS is looking for transiting exoplanets by surveying 200,000 stars near the sun. Over 5,400 candidate exoplanets have been identified and 199 have been confirmed so far.
A group of astronomer led by Shubham Kanodia have recently confirmed another TOI. A transit signal has been found in the light curve of a dwarf star. Follow-up observations confirmed the planetary nature of the signal.
We present the discovery and confirmation of TOI 3757 b, a Jovian sized planet, using a combination of space based photometry from TESS, precise RVs from HPF and NEID.
The TOI 3757 b has a mass of 0.268 Jupiter mass. The lowest density planet known to date is 0.27 g/ cm 3. The exoplanet is in the vicinity of its host every 3.44 days. The equilibrium temperature of this alien world is estimated to be 759 K.
The parent star TOI-3757 is an M dwarf, which is 37 percent smaller and less massive than the sun. The star has a solar metallicity of 7.1 billion years old, and its temperature is at a level of 3,913 K.
The authors of the paper are trying to explain the low density of TOI. They think that the low metallicity of the M dwarf could be responsible for the delayed on-set of gaseous runaway accretion or that it could be a result of evolution mechanisms where the tidal heating causes the inflation of the planet.
The researchers said that the second scenario could be verified by measuring the levels of methane and ammonia. It would be possible to understand the potential for tidal heating with the help of the study.
More information: Shubham Kanodia et al, TOI-3757 b: A low density gas giant orbiting a solar-metallicity M dwarf. arXiv:2203.07178v2 [astro-ph.EP], arxiv.org/abs/2203.07178The Science X Network will be launched in 2022.
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