[ad_1]
There’s no news from the James Webb Space Telescope (JWST) today, and space enthusiasts say there’s no news. Telescopes have clicked so many images of the cosmos, yielded so much information, and then transmit a treasure trove of astronomical secrets to different locations, that almost every day something stands out from their observations. You can see. This time, scientists discovered that JWST clicked on a galaxy that was “light bombing” other galaxies in the photo.
Moreover, scientists weren’t looking for photobombed galaxies to begin with.
The observations were conducted under JWST’s PEARLS (Principal Extragalactic Regions for Reionization and Lensing Science) observing program, with the telescope aimed at a galaxy cluster designated CLG1212. But when the scientists trained his JWST lens on the galaxy cluster, they discovered a faint object in the background.
This was PEARLSDG, a galaxy that photobombarded the galaxy cluster in front of it. PEARLSDG is an isolated dwarf galaxy, and scientists have discovered that there is no star-forming activity in this galaxy.
Watch | Hong Kong’s tattoo renaissance: Celebrating the Year of the Dragon
Isolated dwarf galaxies usually exhibit star-forming activity. This dwarf galaxy is home to an estimated 100 million stars. This number may seem large, but when you compare it to the number of stars in the Milky Way (400 billion), it’s clear why this shape is called a dwarf galaxy.
The team, led by University of Arizona research assistant Tim Carleton, published their findings in The Astrophysical Journal Letters.
“We found a very low sSFR, consistent with low levels of ultraviolet radiation and the absence of emission lines in its spectrum, suggesting that its star formation ceased more than 1 Gyr ago,” the researchers wrote in their paper. Says.
One gil is equivalent to one billion years.
“These types of isolated stationary dwarf galaxies have never actually been observed before, except in relatively few cases. Our current understanding of galaxy evolution suggests that they are not expected to actually exist. So the fact that this object was seen helps us improve our theory of “galaxy formation,” said lead author Carleton.
(Information provided by agency)
[ad_2]
Source link
