Astronomers use the land-based telescopes for the first time to arrive at 13 billion years of observing the universe when the first stars first get the darkened cosmission.
This season, about 800 million years after The Big Bangknown as “cosmic dawn,” and it remains one of the most mysterious and important times of Evolution in the universe.
This new view of Cosmic Dawn comes courtesy to Cosmology large angular surveyor surveyor (Class), a row of telescopes located at the upper atacama region of the northern Chile. The main mission of class is to observe The background of the cosmic microwave (CMB), a cosmic fossil left from an event after the big bang.
“People think it cannot be made from the ground. Astronomy is a technology limited to the technology, and the signals of the team’s activities are difficult to measure,” Johns Hopkins professor of physics and astronomy Tobs, tobias wedding, A statement says. “Earth-based observations faced further challenges compared to space. Overcoming obstacles makes this measurement a significant success.”
Let’s have a light … shining a cosmic fossil
Before about 380,000 years after the Great Bang, the child universe looks like a beautiful place, visually. That because at this time, the light is not able to travel freely because of the fact that photons are endlessly scattered electrons.
This situation has changed when the universe is enlarged and expanded enough to allow electrons to combine with protons and make the first neutral atoms in Hydrogen.
Suddenly, photons are free to travel unchecked with cosmos as universe from the transparent of opaque. This “First Light” appears today as CMB.
If the first stars formed, their serious radiation was shot by electrons from neutral hydrogen again, an event called “AGAIN“The revision of the universe is dark again during a period known as” cosmic black age. “
The signal from the cosmic dawn searched in the class comes from the fingerprint of the first stars in the universe within CMB. It comes in the form of polarized microwave lightly in a million times fly than standard microwaves.
As you think, after traveling to us for 13 billion years and more, the light from cosmic is very welcome.
Trying to know this polarized microwave goirs from the ground is very difficult because it drowns temperature changes like radio rock
Thus, this cosmic radiation is usually sought from space by satellites such as Wilkinson Micakave Microwave anisotropy probe (Wmap) and the European Space Agency’s Space Telescope Plan. That’s up to class.
Action in class
The team behind this new research compares data from class with observations from Planck and WMAP. They are allowed to recognize the sources of interference and hiring a signal from the polarized microwave light to CMB.
Polarization describes what happens when oriented waves in the same direction. This happens when the light is hit by something and scatter it.
“If the light strikes your car’s boil and you see a room, polarization. To see a PHED student and then a partner of the Chicago and then a new common signal, we can find out what we see cosmic glare from light rouncing from the waist of dawn in the morning, so say. “
The specific purpose of this team intends to measure class is the possibility of a photon from the CBB encountered an electron free of hydrogen through the first stars in the universe.
To do so should help scientists better explain signals from CMB and the initial glow of the Big Bang, so helping them paint a clear cosmos.
“The measurement of this sign is more accurate is a significant microwave background research,” statement of space on space mission team leader Charles Benett. “For us, the universe is like a physics lab. Better measures of the universe help refine our understanding of dark things and neutrinos, abundant but more particles filling in the universe.
“By analyzing additional class data continued, we hope to reach the highest possible accuracy to achieve.”
This new research is built on the first job found the class map 75% of the night sky in the land because it makes the right measurement of CMB polarization.
“No Earth-based experiments can do what class,” says Nigel Shart, Director of Program National Science Foundation .
Team research has been published on Wednesday (June 2) of The Asstrophysical Journal.
