Newly discovered extremely red and far Galaxies

Artist's rendition of red galaxiesA whole new Galaxy has been discovered by Scientists. They are red in appearance and have a whole new morphological classification.

This Galaxy has been discovered by Spitzer space telescope of NASA through which four remarkably red galaxies, which are about 13 billion light years away. According to researchers, this new finding can help us in our study of the history of the universe, which is about 13.7 billion years old, as 13 billion light years represent 13 billion years old.

Hubble has shown us some of the first protogalaxies that formed, but nothing that looks like this,” study co-author Giovanni Fazio, of the Harvard-Smithsonian Center for Astrophysics, said in a statement. “In a sense, these galaxies might be a ‘missing link’ in galactic evolution.”

These newly found galaxies glow in infrared light rather than in visible light and that is why it has been detected by infrared-sensitive telescope i.e. Spitzer. However, researchers are working to find out the reason of its infrared light.

According to researchers, there are three known reasons for infrared glow i.e. galaxy may be very dusty, there may exist more old red stars and/or extreme distance from us and in this case it will glow in red due to expansion of the universe and stretching of the universe shows a red light.

“Hubble has shown us some of the first protogalaxies that formed, but nothing that looks like this. In a sense, these galaxies might be a ‘missing link’ in galactic evolution” said co-author Giovanni Fazio of the Center for Astrophysics.

Reference:

J.-S. Huang, X. Z. Zheng, D. Rigopoulou, G. Magdis, G. G. Fazio and T. Wang, (2011). FOUR IRAC SOURCES WITH AN EXTREMELY RED H – [3.6] COLOR: PASSIVE OR DUSTY GALAXIES AT z > 4.5? The Astrophysical Journal, doi:10.1088/2041-8205/742/1/L13