An international team of researchers announced the discovery of a pair of previously unknown exoplanets. They orbit the red giants.
The discovery was made during the analysis of data collected by the TESS space telescope. Subsequently, the existence of exoplanets was confirmed as a result of measurements of radial velocities performed by ground-based observatories.
The discovered exoplanets were designated TOI-4377 b and TOI-4551 b. They orbit red giants located at a distance of 1,486 and 704 light-years from Earth. Both worlds are hot Jupiters. The radius of TOI-4377 b is about 1.35 Jupiter radius, and the mass is about 0.96 Jupiter mass. Its orbit passes at a distance of 0.058 AU (8.6 million km) from the star, it makes one orbit in 4.38 days.
As for TOI-4551 b, its radius is about 6% larger than the radius of Jupiter, and its mass is estimated at 1.49 Jupiter masses. It is located at a distance of 0.1 AU (15 million km from the parent star) and spends 10 days on one orbit.
As for the stars TOI-4377 and TOI-4551, their masses are 1.36 and 1.31 solar, respectively. They are about 3.5 times the size of the Sun. The age of TOI-4377 is estimated at 3.88 billion years, TOI-4551 is about 1 billion years older.
The find is of considerable scientific interest. Astronomers do not know so many exoplanets today that orbits at such a short distance from the red giants. These stars are gradually expanding, which will eventually lead to the destruction of the worlds orbiting them.
According to https://phys.org
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