14 Apr 2019

"J0815+4729" the first star to be born in the Milkyway founded recently!

"J0815+4729" the first star in Milkyway!


Stars are only the source of life and energy of the Universe, because without light we can’t think about possibility of life and also stars are the only source of light in this universe.

As we know more than trillions of stars are present in the Universe and if we see place of our solar system then, it seems to be nothing. If we remove our sun from the Universe then nothing will seen to be changed, that’s the reality of our existence.

In this big universe all stars are not the same, they are of very different types. They should be different on the basis of their age, metal concentration, rate of reaction, energy usage, and many more such categories, on which they should be differ from each other. But, here we are going to know about one of the oldest star of our Milkyway that we found.

But here is a question, only it's age makes it different or it gives us another knowledge to know more about this mysterious Universe?

So, being too old makes it too intresting and apart from it could reveal knowledge about beginning of the Universe So, find  out in detail.

Astronomers found a star which is present 7,500 light years away from the sun using spectra obtained with OSIRIS (Optical System for Imaging and low-intermediate-Resolution Integrated Spectroscopy) on the Gran Telescopio Canarias (GTC), at the Roque de los Muchachos Observatory.

This star is named to be J0815+4729. This star is not as a ordinary one, most interesting fact about J0815+4729 is it's age because it is found among  one of the oldest star  in our Milkyway galaxy.

With using Spectroscopy astronomers decomposes the light of celestial bodies to study about their chemical and physical properties. The study on J0815+4729 reveals that, it has only one-millionth of calcium and iron that sun contains but it has comparatively high amount of carbon, almost 15 percent of total solar abundance.

J0815+4729 is present in Lynx constellation and still on the main sequence of the constellation. Star is 0.7 of the weight of the sun whereas its surface temperature is 400 degrees hotter.

Study of this star could give the knowledge about the first chemicals and elements formed in the galaxy. It requires high resolution Spectroscopy on large telescope to find out chemical composition of this star, and through this we will understand first supernova and it's progenitors in better way.

Theories predict that these stars could use materials from first supernova whose progenitors were first massive stars in this galaxy and were formed only 300 million years after the Big Bang. “ In spite to the age of J0815+4729 and it's distance from us we can still study it” says Jonay González Hernández.

Actually, this star was first identified from the SDASS (Sloan Digital Sky Survey) database, and it was later observed with the ISIS intermediate dispersion spectrograph on the William Herschel Telescope (WHT) of the Isaac Newton Group of Telescopes, which is also at the Roque de los Muchachos Observatory.

In the near future, the HORS high-resolution Spectroscopy, which is in trail phase currently on GTC will be the key instrument to analyse the chemical composition of weak stars like J0815+4729. Scientists are working on the high resolution and wide spectral Spectroscopy to analyse the very far present stars with special characters like J0815+4729.

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