(ORDO NEWS) — Using the NASA Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new exoplanet with an ultrashort period.
A team of scientists led by Felipe Murgas of the University of La Laguna recently confirmed another exoplanet tracked by TESS.
In a research paper, the scientists report that a transit signal has been identified in the light curve of the solar-type star HD 20329 (or TOI-4524).
The planetary nature of this signal was confirmed by subsequent radial velocity measurements made with the HARPS-N spectrograph.
The radius of HD 20329 b is 1.72 Earth radii, the planet is about 7.42 times more massive than the Earth, and its average bulk density is about 8.06 g/cm3.
The orbital period of the planet is about 22.2 hours. The results show that HD 20329 b is only 0.018 AU away. away from the star, and its equilibrium temperature is estimated at 2000 K.
The parent star has a radius of 1.13 solar radii and is about 10 percent less massive than the Sun.
HD 20329 is estimated to be 11 billion years old, has a metallicity of -0.07, and an effective temperature of 5596 K. The system is about 207.6 light-years away.
HD 20329 b will add to the list of about 120 known exoplanets with an ultrashort period.
The authors of the article do not exclude the possibility that there are more objects in the HD 20329 system, but further observations are required to confirm this.
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