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Starlight's new calculation Scientists Back at Cosmic Time



If you are a fan of great numbers that do not really say about the world, Marco Ajello's astronomer at Clemson University is very good for you: 4 x 10 ^ 84.

It is the dust that passes away from the star and that overlooks the universe's history. Being really worth expecting, of course, and there is there in its incomprehensible magnitude. (To compare, how many atoms the universe's new amount is just about a few approximate sizes.)

Despite calculating this number, Ajello and his team are in favor of the new research. The research protects the previous theory of star formation rates in the history of the universe, using all the information contained in this star, which is known as the extragalactic backlight. [Gamma-Ray Universe: Photos by NASA’s Fermi Space Telescope]

Reason is good for the stars that fascinate us.

Reason is good for the stars that fascinate us.

Credit: NASA / JPL-Caltech / STScI / IRAM

Extragalactic rear light, by definition, is a part of optical and ultraviolet infrared radiation, resulting in star-shaped stars that turn space into the dust surrounding them. "Basically it was everywhere it was a star," Ajellok told Space.com. "The light that emits all the stars that escape from space essentially becomes this background."

But it is difficult to measure the extragalactic rear light, which extends over the entire universe and is bright light in the vicinity of the Earth. Therefore, Ajello and his co-authors tried to explore the light of the backlight while using blazes: it conceals a type of galaxy that is super-massive black holes while a giant stream of high-energy material is shooting more or less. our direction These blazers and the data on ultraviolet Gamma rays give kindness to the NASA Fermi Gamma-ray Spacial Telescope.

The study is based on the annoying features of the blinks: particles that have less energy in the light of particle energy with less light energy, as a photon that humans can see. This blow becomes a couple of different photons in an electron and in a positron, especially with the disappearance of a photon of high-energy photon of the blasphemy. "In a sense, the disadvantage is that if you are based on Blazar's studies," said Manasvita Joshi, an astrophysicist at Boston University, told Space.com. "But you can use something like that in your advantage."

The interaction between photovoltaic photo frames and extragalactic rear light starts only at a certain level of energy. This means that the scientists can extrapolate the energy produced at the lowest level of energy to the higher levels of energy. Then, they can calculate the difference, that is, when collisions disappear. And from here on, the collapse of that collision is enough to measure the extragalactic rear light.

By analyzing a lot of blazars – 739, in detail, in distant places on the ground, the team can detect extragalactic rear light changes over time. "To measure how the bright star evolves in the whole universe, you can really transform it into the measurement of star formation," said Ajello. "We explain how the history of the universe has changed." [Messier’s List: Hubble Telescope’s Stunning Views of Deep-Sky Objects]

"Now, the new thing is used to represent the history of cosmic star formation," said Joshi. The scientists who wanted to face this question have long been, but so far they have had to do it individually and are based on several initial budgets. "Problem [with previous estimates] This is your initial mass function … it's really an invention, it's an initial invention and it can create uncertainty, "said Josh.

So, taking up this different approach with these presuppositions, it extends astrophysics on the same form of star formation, Joshi said. These evidences are not only considered valid, but scientists think they were in the right direction, with initial assumptions about ways to estimate star formation over time.

So it was the tallest time to release stars? About 10 million years ago. And the evidence is in his starlight.

It is published in a paper published in the Research Science journal on the 29th.

Email Meghan Bartels at mbartels@space.com or continue @meghanbartels. Follow us @ Spacedotcom and Facebook. On the original article Space.com.


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