Kepler telescope discovery: hot planets
This news passed by Habr, nevertheless it is very important in its industry.
The recently launched Kepler telescope, which was supposed to look for planets similar to the Earth, instead found other planets - hot things that are not like Earth or planets at all. Because they are hotter than the stars around which they rotate.
')
UPD: solution
Kepler is designed to search for planets by the shadow cast by them on a telescope. More precisely, the penumbra - in fact a distant small planet is not able to completely close the huge star. When a planet passes through a star's disk, it partially covers its surface, and as a result we see a slight drop in the star's brightness. If the passage of the planet on the disk occurred, and then repeated several times - with the same depth of brightness and with the same orbital period - this gives confidence that the planet is detected.
However, for the stars KOI-74 and KOI-81 there is an unexpected result. When a star closes the planet, more light disappears than when the planet closes the star - that is, the disk of the planet is brighter than the star.
It turns out that two incomprehensible objects circle around two hot stars. Their sizes are about the size of Jupiter, their masses are two orders of magnitude greater than the mass of the largest planet in the solar system. At the same time, their temperature is higher than that of their hot parent stars, even by stellar standards. And, judging by the light curve, they emit equally well both the day (facing the star) and night sides.
What is it? The most honest answer to such a question is unknown, but there is no meaningful answer. Such an object obviously cannot be arranged like a planet - firstly, the mass is too large, and secondly, even if this mass is measured incorrectly, a planet with such a temperature would have swelled much more than one or two Jupiter radii. The same reasoning applies to brown dwarfs, which in fact differ little from very large planets.
It can not be ordinary stars, fed by ordinary nuclear reactions in the center, because stars of this size are dull red dwarfs with a temperature of 3-4 thousand Kelvin, and not 12 thousand -13 thousand degrees. It is unlikely that the alien thermonuclear powerplant - simply because it is unlikely.
The universe has once again confirmed that it is much more interesting and unexpected than our ideas about it.
The recently launched Kepler telescope, which was supposed to look for planets similar to the Earth, instead found other planets - hot things that are not like Earth or planets at all. Because they are hotter than the stars around which they rotate.
')
UPD: solution
Kepler is designed to search for planets by the shadow cast by them on a telescope. More precisely, the penumbra - in fact a distant small planet is not able to completely close the huge star. When a planet passes through a star's disk, it partially covers its surface, and as a result we see a slight drop in the star's brightness. If the passage of the planet on the disk occurred, and then repeated several times - with the same depth of brightness and with the same orbital period - this gives confidence that the planet is detected.
However, for the stars KOI-74 and KOI-81 there is an unexpected result. When a star closes the planet, more light disappears than when the planet closes the star - that is, the disk of the planet is brighter than the star.
It turns out that two incomprehensible objects circle around two hot stars. Their sizes are about the size of Jupiter, their masses are two orders of magnitude greater than the mass of the largest planet in the solar system. At the same time, their temperature is higher than that of their hot parent stars, even by stellar standards. And, judging by the light curve, they emit equally well both the day (facing the star) and night sides.
What is it? The most honest answer to such a question is unknown, but there is no meaningful answer. Such an object obviously cannot be arranged like a planet - firstly, the mass is too large, and secondly, even if this mass is measured incorrectly, a planet with such a temperature would have swelled much more than one or two Jupiter radii. The same reasoning applies to brown dwarfs, which in fact differ little from very large planets.
It can not be ordinary stars, fed by ordinary nuclear reactions in the center, because stars of this size are dull red dwarfs with a temperature of 3-4 thousand Kelvin, and not 12 thousand -13 thousand degrees. It is unlikely that the alien thermonuclear powerplant - simply because it is unlikely.
The universe has once again confirmed that it is much more interesting and unexpected than our ideas about it.
infoxSource: https://habr.com/ru/post/82027/
All Articles