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ASU astronomers capture red dwarf star in a superficial outbreak

New observations by two Arizona State University astronomers using the Hubble Space Telescope have captured a red dwarf star in…

New observations by two Arizona State University astronomers using the Hubble Space Telescope have captured a red dwarf star in a violent outbreak or super flare. Radiation radiation was more powerful than any outbreak ever discovered from the sun, and would likely affect the planet’s manageability.

In addition, the astronomers say that such superfighters appear more common in younger red dwarfs, such as eruptions 100 to 1000 times more powerful than they do when they fill.

The superflar was detected as part of a Hubble space telescope observational program called HAZMAT, which stands for “HAbitable Zones and M dwarf Activity over Time”. The program maps red dwarfs (also known as M-dwarfs) in three different ages &#821

1; young, middle and old – and observes them in ultraviolet light, showing the most activity.

“Red dwarf stars are the smallest, most common and longest living stars in the galaxy,” said Evgenya Shkolnik, a deputy professor of ASU’s Earth and Space Research School, and the HAZMAT program’s main researcher. “In addition, we believe that most red dwarf stars have systems of planets that circulate around them.”

The orbit of the Hubble telescope above the Earth’s atmosphere gives clear unobstructed views at ultraviolet wavelengths. The flaps are assumed to be driven by intense magnetic fields that disappear from the moving movements of the stellar atmosphere. When the imprisonment becomes too intense, the fields break and reconnect, releasing huge amounts of energy.

ASU Postdoctoral Researcher Parke Loyd is the first author of the paper (to be published in the Astrophysical Journal) reporting the star outbreak.

He says, “When I realized the large amount of light that the superfiler released, I sat on my computer screen for a while and just thought,” Whoa. “”

Loyd notes, “Collecting data about young red dwarfs has been particularly important because we suspected that these stars would be quite untouched in their youth, which are the first hundred million years or so after they were formed.” [19659002] He adds: “Most of the potentially inhabited planets in our galaxy have had to withstand intense stains like those we observed at some point in their lives. It’s an immersive thought.”

Coarse Environment for planets

About three quarters of the stars in our Milky Way galaxy are red dwarves. Most planetary planetary planes of the galaxy – planets circling their stars at a distance where the temperature is moderate to allow liquid water to exist on their surface – orbital dwarves. In fact, the closest star to our sun, a red dwarf named Proxima Centauri, has a planet in the earth’s size in its inhabited zone.

But red dwarves – especially young red dwarfs – are active stars and produce stains that can explode so much energy that it interferes and possibly removes the atmosphere of these volatile planets.

“The purpose of the HAZMAT program is to understand the planet’s well-being around low-mass stars,” explains Shkolnik. “These low-mass stars are critical to understanding the planetary atmosphere.” Ultraviolet radiation can modify chemistry in a planet’s atmosphere or possibly remove the atmosphere.

The observations reported in the Astrophysical Journal reviewed the flare rate of 12 young (40 million years old) red dwarfs and represent only the first part of the HAZMAT program. These stars show that young low-mass stars flare much more often and more energetically than old stars and middle-aged stars like our Sun – as evidenced by the superflar.

“With the sun, we have hundreds of good observations,” said Loyd. “And during that time we have seen one, maybe two, flares that have an energy approaching the super flannel.”

But he says, “I A less than one day worth of Hubble observations of these young stars, we got super flare. This means that we look at superflares that happen every day or even a few times a day. “

Can superflares of such frequency and intensity bathe young planets in as much ultraviolet radiation as they rule forever

According to Loyd,” Flares as we observed has the ability to remove the atmosphere from a planet. But that does not necessarily mean stupid and stupidness for life on the planet. It can only be different from what we imagine. Or there may be other processes that can complement the planet’s atmosphere. It’s really a tough environment, but I would hesitate to call it a sterile environment. “

The next part of the HAZMAT study will be studying between red dwarfs of 650 million years old. After that, the oldest red dwarfs are analyzed and compared to the young and intermediate stars to understand the development of the high energy radiation environment for planets around These low-mass stars.

Red dwarves estimated to burn for as long as trillion years have a great time to ultimately develop living planets.

“They only have many more opportunities for life to evolve in terms of their life expectancy, “says Shkolnik.” I do not think we’ll know, in one way or another, whether planets circling dwarfs are habitable yet, but I think time will tell. “

She says,” It’s amazing that we live at a time when we have the technology to actually answer such questions, rather than just philosophizing about them.

Related Links

Arizona State University

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