A huge super-earth orbits its star in half a day

TESS is surveying about 200,000 of the brightest stars near the Sun to detect transiting exoplanets.

So far, more than 2,500 exoplanet candidates (TESS or TOI objects of interest) have been identified, 113 of which have already been confirmed.

A team of astronomers led by Paz Bloom fromHeidelberg University in Germany reports the discovery of another exoplanet using the spacecraft.  Between November 28 and December 23, 2019, TESS observed a nearby M-class dwarf star, TOI-1685. This led to the detection of a transit signal in the light curve of this object. The planetary nature was confirmed by subsequent precise measurements of the radial velocity using the CARMENES instrument.

Planet TOI-1685b is about 70% larger than Earth, a feature of its ultra-short orbital period. It is 0.669 days.

According to research, TOI-1685b has a radiusabout 1.7 times the radius of the Earth and about 3.78 times more massive. This means that the volumetric density of the planet is at the level of 4.21 g / cm³. These parameters make TOI-1685b the least dense ultrashort-periodic planet around the M dwarf known to date.

The planet's equilibrium temperature is estimated at about 796 ° C (1,069 Kelvin). TOI-1685b is one of the hottest transiting super-lands.

The planet's host star, TOI-1685, is a dwarfspectral class M. It is located at a distance of about 122.5 light years from Earth. Its effective temperature is 3,161 °C (3,434 K), and its age is estimated to range from 0.6 to 2 billion years.

Read more

Physicists have created an analogue of a black hole and confirmed Hawking's theory. Where it leads?

Sea slugs cut off their head to regenerate a new body

Abortion and science: what will happen to the children who will give birth

CARMENES - Calar Alto high-Resolution search for M dwarfs with Exoearths with Near-infrared and optical Échelle Spectrographs

Spectral class M - brown dwarfs,close in mass to red dwarfs, in the early stages after formation, they can have a spectral type of M6.5 or fainter. Such stars are also sometimes called late-M dwarfs. As they cool down (and their cooling may take 10 billion years), they gradually pass into the L class, which is more characteristic of brown dwarfs.