#astronomy In a primary, astronomers discover traces of a planet orbiting a white dwarf – Astronomy Now

December 9, 2019 - Comment

An artist’s impression of a Neptune-like ice big planet orbiting a white dwarf. As a result of it orbits the stellar remnant at shut vary, a lot of the planet’s environment has been stripped away by intense ultraviolet radiation, forming a disc across the star. Picture: ESO/M. Kornmesser Within the first commentary of its sort,



An artist’s impression of a Neptune-like ice big planet orbiting a white dwarf. As a result of it orbits the stellar remnant at shut vary, a lot of the planet’s environment has been stripped away by intense ultraviolet radiation, forming a disc across the star. Picture: ESO/M. Kornmesser

Within the first commentary of its sort, astronomers utilizing the Very Giant Telescope in Chile have discovered proof of a Neptune-size planet orbiting a white dwarf, the collapsed remnant of a Solar-like star that has run out of nuclear gasoline. The planet orbits so near the dwarf that its environment has been stripped away by intense ultraviolet radiation, forming a disc across the star.

“It was a type of likelihood discoveries,” stated Boris Gänsicke, a researcher on the College of Warwick who led the research. The group was tipped off by discovering traces of parts not seen within the spectra of some 7,000 different white dwarf stars noticed by the Sloan Digital Sky Survey.

“We knew that there needed to be one thing distinctive occurring on this system, and speculated that it might be associated to some sort of planetary remnant,” he stated.

Utilizing the X-shooter instrument with the European Southern Observatory’s VLT, the group discovered indicators of hydrogen, oxygen and sulphur within the gentle from a star often called WDJ0914+1914. The detected ranges had been much like these discovered icy fuel giants like Uranus and Neptune. If such an ice big orbited near a sizzling white dwarf, its outer layers might be stripped away, forming a disc.

“It took a couple of weeks of very laborious considering to determine that the one approach to make such a disc is the evaporation of an enormous planet,” stated Matthias Schreiber from the College of Valparaiso in Chile.

The analysis, revealed within the journal Nature, provides a glimpse into what may await Earth’s photo voltaic system with the Solar burns out and its core collapses right into a white dwarf.

“Till lately, only a few astronomers paused to ponder the destiny of planets orbiting dying stars,” stated Gänsicke. “This discovery of a planet orbiting intently round a burnt-out stellar core forcefully demonstrates that the universe is repeatedly difficult our minds to step past our established concepts.”

The invention, he stated, “opens up a brand new window into the ultimate destiny of planetary programs.”



Supply hyperlink

Comments

Comments are disabled for this post.