[B][URL=https://www.nasa.gov/feature/jpl/astronomers-find-planet-hotter-than-most-stars]A newly discovered Jupiter-like world[/URL] is so hot, it’s being vaporized by its own star.
With a dayside temperature of more than 7,800 degrees Fahrenheit (4,600 Kelvin), KELT-9b is a planet that is hotter than most stars. But its blue A-type star, called KELT-9, is even hotter -- in fact, it is probably unraveling the planet through evaporation.
"This is the hottest gas giant planet that has ever been discovered," said Scott Gaudi, astronomy professor ....KELT-9b is 2.8 times more massive than Jupiter, but only half as dense. ....
“It’s a planet by any of the typical definitions of mass, but its atmosphere is almost certainly unlike any other planet we’ve ever seen just because of the temperature of its dayside,” Gaudi said.
The KELT-9 star is only 300 million years old, which is young in star time. It is more than twice as large, and nearly twice as hot, as our sun. Given that the planet’s atmosphere is constantly blasted with high levels of ultraviolet radiation, the planet may even be shedding a tail of evaporated planetary material like a comet.
“KELT-9 radiates so much ultraviolet radiation that it may completely evaporate the planet," said Keivan Stassun, a professor of physics...[/B]
Существование горячих юпитеров, в свете газовой концепции, уже вызывает законные подозрения. В данном случае это особенно выражено в виду относительно низкой массы объекта и, соответственно, напряжённости гравитационного поля, высокой температуры именно дневной стороны планеты, что может вызывать ещё большее недоумение по поводу стабильности объекта. Если вероятный газовый шлейф так и не будет обнаружен, то это будет свидетельствовать против самой [I]газовости [/I]юпитеров.
With a dayside temperature of more than 7,800 degrees Fahrenheit (4,600 Kelvin), KELT-9b is a planet that is hotter than most stars. But its blue A-type star, called KELT-9, is even hotter -- in fact, it is probably unraveling the planet through evaporation.
"This is the hottest gas giant planet that has ever been discovered," said Scott Gaudi, astronomy professor ....KELT-9b is 2.8 times more massive than Jupiter, but only half as dense. ....
“It’s a planet by any of the typical definitions of mass, but its atmosphere is almost certainly unlike any other planet we’ve ever seen just because of the temperature of its dayside,” Gaudi said.
The KELT-9 star is only 300 million years old, which is young in star time. It is more than twice as large, and nearly twice as hot, as our sun. Given that the planet’s atmosphere is constantly blasted with high levels of ultraviolet radiation, the planet may even be shedding a tail of evaporated planetary material like a comet.
“KELT-9 radiates so much ultraviolet radiation that it may completely evaporate the planet," said Keivan Stassun, a professor of physics...[/B]
Существование горячих юпитеров, в свете газовой концепции, уже вызывает законные подозрения. В данном случае это особенно выражено в виду относительно низкой массы объекта и, соответственно, напряжённости гравитационного поля, высокой температуры именно дневной стороны планеты, что может вызывать ещё большее недоумение по поводу стабильности объекта. Если вероятный газовый шлейф так и не будет обнаружен, то это будет свидетельствовать против самой [I]газовости [/I]юпитеров.
Изменено:
Алексей Трофимов - 30.06.2017 12:34:14
