Scientists have found a planet, most hot stars known

Astronomers have discovered one of the most unusual at this time of exoplanets. It is a gas giant like our Jupiter, but it is so close to its star, it makes a complete revolution around it in just 1 to 5 days. As a result, the surface temperature of the planet at greater than most stars known.

Scientists have found a planet, most hot stars known

The orbit of the planet lies near the star KELT-9, located approximately 650 light-years away. Scientists note that the first encounter with the planet, turns around so close to the star and has such a temperature level. Judge: temperature ekzoplanety surface KELT-9b on the daylight side can rise to about 4600 degrees Kelvin. For comparison, the surface temperature of the Sun is about 5800 degrees Kelvin. A Mercury, planet, also located very close to a star, the temperature hardly reaches 700 degrees Kelvin.

The reason why the detected gas giant reigns hell, is that the star is very hot. Its temperature is about 10 to 170 degrees Kelvin.

"It is fair to say that this planet is hotter at least 80 percent of the stars known. That in itself is amazing, "- says astronomer Jonty Horner of the University of Southern Queensland (Australia) did not take part in the opening.

"At this temperature, the surface of the planet is more like the surface of its home star. The temperature and brightness of the star itself is much higher than that of our sun. Overall, this makes the planet the hottest ever found us. Its temperature over 1000 Kelvin higher than the hottest planet detected before. "

The scientists were able to find out some interesting details about this exoplanet. For example, despite the fact that KELT-9b approximately 2 and 8 times the mass of Jupiter, it has a half lower density compared to our gas giant. This is explained by the fact that the planet's atmosphere is constantly blown away due to strong activity of the native star.

"By all definitions, based on the weight of the object - this is precisely the planet. But its atmosphere is not like any other, which was detected in any of the other planets. At least in part the enormous temperature difference on its day side, "- says one of the discoverers of KELT-9, an astronomer Scott Gaudi of Ohio State University (USA).

In fact, scientists are very surprised by the fact that the planet is generally able to withstand such intensive exposure to heat.

"I am truly surprised that this planet exists at all. When you have such a massive and very bright star, its radiation power so great that it can actually blow the whole component of the planet matter. But for the formation of such planets in that region of space there are not too much gas and dust, "- said astronomer Swinburne University of Technology, Alan Duffy, who was not involved in the study.

Such extreme conditions in which the planet has to be unlikely to allow it to exist for a long time, scientists say. According to estimates, KELT-9b planet can lose on a daily basis about 10 000 tonnes of its mass, which is likely to create a huge tail behind it, which we usually used to seeing comets.

Probably will take not much time before the outer layers of the planet will be completely blown away by the influence of the stars, exposing the hard core (though not the fact that a solid, since scientists still do not know what nuclei have planets similar to KELT-9b ). As noted by Horner, the study of the planet was conducted in collaboration with an international team of researchers and amateur astronomers, so scientists have been able to spend a truly sophisticated surveillance.

"We actually were able to push the boundaries of technological capabilities. The results of this work are really impressive, "- he said in a conversation with Horner ScienceAlert.

Scientists have found a planet, most hot stars known

Typically, scientists are trying to search for extrasolar planets around smaller, fainter stars like our Sun, since they are easier to observe and carry out checks on the possible presence near them planetary objects. However, the observation of the planet is so hot as KELT-9b, allows you to expand the boundaries of our understanding of what might be lurking in the more difficult to study systems.

"The work suggests that in these superhot and super-bright stars also may be the world. Yes, as it turned out, so interesting, "- says Duffy.

Now that scientists have discovered the existence of this wonder of the world, they would like to examine in more detail KELT-9b with other telescopes. And in this case, in their opinion, could help the new James Webb Space Telescope, which space agency NASA plans to launch next year.