Madrid, 17 (Europe Press)
In truth, two spiral galaxies within the means of merging, Arp 220 shines most brightly in infrared mild, making it a really perfect goal for Webb. It’s an ultra-bright infrared galaxy (ULIRG) with a luminosity of greater than a trillion suns.
By comparability, our Milky Method galaxy has a extra modest luminosity of about ten billion suns, in keeping with NASA.
Situated 250 million light-years away within the Serpens constellation, the Serpent, Arp 220 is object quantity 220 in Halton Arp’s Atlas of Alien Galaxies. It’s the closest ULIRG and the brightest of the three galaxy mergers closest to Earth.
The collision of the 2 spiral galaxies started about 700 million years in the past. It brought on a large explosion of star formation. There are about 200 superclusters of stars in a dusty, compact area about 5,000 light-years in diameter (about 5 p.c the diameter of the Milky Method). The quantity of gasoline on this small area is the same as all of the gasoline in the whole Milky Method.
Earlier radio telescope observations revealed about 100 supernova remnants in a area lower than 500 light-years away. NASA’s Hubble House Telescope has detected the cores of guardian galaxies 1,200 light-years aside. Every of the cores comprises a rotating ring of star formation that emits dazzling infrared mild that’s evident on this view of Webb. This dazzling mild produces diffraction spikes, a attribute of exploding stars that dominate this picture.
On the outskirts of this merger, Webb reveals faint tidal tails, or materials pulled from galaxies by gravity, depicted in blue, proof of a galactic dance occurring. Natural matter represented as reddish-orange seems in streams and filaments alongside Arp 220.
Webb noticed the Arp 220 with a close to infrared digital camera (NIRCam) and medium infrared instrument (MIRI).