by Whoooooo's there? Merely a "Cosmic Owl," the newest peculiar finding from theJames Webb Space Telescope (JWST).
A recent study utilizing data from the JWST has enabled scientists to identify an owl-like figure gazing back at us from across billions of light-years. It was created through an exceptionally rare collision of two uncommon objects.ring galaxies, the structure also functions as a natural laboratory where scientists can examine various processes associated with galaxy evolution.
Galaxiescome in a variety of forms, including swirling spirals such as our home galaxy, theMilky Way, to the cigar-shaped M82. One somewhat more unusual type are ring galaxies, likeHoag's ObjectThese galaxies develop when a smaller galaxy passes directly through its larger companion, displacing stars and gas via shock waves into a ring surrounding a central core.
Ring-shaped galaxies are quite uncommon, making up only 0.01% of all galaxies found to date. Even more uncommon, however, is the observation of two ring galaxies during a collision — precisely what the "Cosmic Owl" is, as reported on June 11 in apreprintsubmitted to arXiv. The study has not yet undergone peer review, but the event has already been verified by another group that independently observed the same collision — which they called the "Infinity galaxy" in a paper published on arXiv on June 19.
Mingyu Li, a doctoral candidate in the Department of Astronomy at Tsinghua University in China and the lead researcher of the new study, mentioned that he and his colleagues stumbled upon the bird-like astronomical phenomenon by chance.
We were examining all radio sources by utilizing publicly available JWST data in a region that has been extensively studied, known as theCOSMOS field, the biggest mosaic of the sky, covering 2 square degrees, he mentioned to Live Science via email. Li noted that the colliding galaxy pair immediately caught attention due to JWST's advanced imaging quality.
Related: 42 astonishing images from the James Webb Space Telescope
These images showed that the galaxies are very alike; in addition to being ring-shaped, both are fairly small. Each has a diameter of approximately 26,000 light-years, or roughly one-fourth the size of the Milky Way. Furthermore, each galaxy's center — which is densely filled with ancient stars surrounding a supermassiveblack hole— creates the eye of an owl. High-resolution JWST data reveals that both black holes, each more than 10 million times the mass of the sun, are rapidly consuming nearby material, causing the galaxy centers to become "active galactic nuclei."
In contrast, the JWST images reveal that the "beak" — the collisional front where the two galaxies meet — is "a region of extreme activity," according to Li. Using data from the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, the researchers discovered that the beak holds a massive clump of molecular gas. Li referred to it as "the raw material for star formation," which is being compressed by the shock wave caused by the galaxies' collision. The ALMA data also determined the owl's redshift to be 1.14, meaning it is roughly 11 billion light-years away from us.
Furthermore, radio-frequency data from the New Mexico-basedVery Large Arraysuggest that a stream of charged particles erupting from a black hole in one galaxy is colliding with and squeezing the molecular gas cloud. As Li explains, the shock wave and the radio jet have "initiated a significant surge in star formation," turning the beak into a 'stellar nursery.'"
Galactic collision simulations indicate they take several hundred million years. In this instance, scientists believe the collision happened 38 million years ago, suggesting the owl's face will probably stay visible for a considerable period.
But the owl is more than just visually impressive, Li noted — it's also "an exceptional natural laboratory because it enables [researchers] to observe several key galaxy evolution processes occurring at the same time within a single system."
In reality, the owl has already offered important information regarding the formation and growth of galaxies. Li mentioned that the bursts of star formation caused by galactic collisions and radio jets in the beak area "might be a key and previously overlooked process for the fast and effective transformation of gas into stars." This could assist scientists in comprehending how galaxies accumulated their stellar mass so rapidly during the early stages of the universe, he noted.
The scientists intend to conduct additional research on the owl to gain insight into the physical mechanisms responsible for its creation. Li mentioned that simulations of the galaxies' gas would assist researchers in "grasping the specific conditions — like the collision angle and the initial configuration of the galaxies — that might result in the formation of this uncommon, symmetrical 'twin-ring' shape."
The owl joins a variety of oddly shaped astronomical phenomena that the JWST has previously observed. These include aquestion-mark-shaped structureformed by galaxies and a trace of gas from a young star thatresembles a cat's tail.
Liked this article? To discover more stories like this, follow us on MSN by clicking the +Follow button located at the top of this page.
No comments:
Post a Comment