When young stars coalesce out of a cloud of molecular hydrogen, a disk of leftover material called a protoplanetary disk surrounds them. This disk is where planets form, and astronomers are getting better at peering into those veiled environments and
published the paper.
"In ten percent of the evolved binary stars with discs we studied, we see a large cavity in the disc,"first author Kluska in a press release."This is an indication that something is floating around there that has collected all matter in the area of the cavity." These disks can only form in certain circumstances and with certain types of stars. It requires post-asymptotic giant stars. Post-AGB stars are cool, luminous stars in a stage of stellar evolution that stars like our Sun go through. The mass range for post-AGB stars is from about 0.8 to 5 solar masses.Post-AGB stars have exhausted their supply of hydrogen. The star's core is mainly inert carbon and oxygen, but its outer layer expands and cools. The star becomes a red giant.
But the star has lost a lot of its mass by shedding it into space. If it has a binary partner, the material doesn't go far. The binary pair will have a center of gravity, and the ejected material will form a circumbinary disk around the center. But the authors of this study say that even if the cavity in the disk is from a planet, that planet might not necessarily be a second-generation planet.
Brasil Últimas Notícias, Brasil Manchetes
Similar News:Você também pode ler notícias semelhantes a esta que coletamos de outras fontes de notícias.
Why Are So Many Americans Still Dying of COVID?Why are so many Americans still dying of COVID? For one thing, says data guru jburnmurdoch, small differences in vaccination rates can make a big difference. He spoke with dwallacewells
Consulte Mais informação »
Dying Light 2: Stay Human Is A Terrible WasteDying Light 2 is a good example of what's wrong with modern videogame design. Read our review.
Consulte Mais informação »
Hari Nef Was Dying to Be on And Just Like That …“I didn’t care what they wanted me to play. I was there.”
Consulte Mais informação »
A Second Generation of Planets can Form Around a Dying Star - Universe TodayPlans from disks of material rotating around young stars. But now it looks like dying binary stars can form planets, too.
Consulte Mais informação »
Failure to Pass Pro Act Makes Amazon Union Vote in Alabama Even Harder, Says Sanders'Workers need protection and of course we've got to give them that protection through the PRO Act.' berniesanders
Consulte Mais informação »
Amazon Profit Shows Resilience Even as Labor, Supply Crunch Weigh on ResultsThe company's profit nearly doubled as it controlled labor and supply costs better than expected and saw gains in its cloud-computing and advertising businesses.
Consulte Mais informação »