Because this is the most distant fast radio burst ever detected, that means its also the oldest, and it’s likely that the released energy came from a restless dead star when the universe was less than half its current age.Īlong with its impressive age and distance, this particular fast radio burst was also surprisingly powerful. In fact, the merger is so messy and so distant that Ryder can’t be sure whether it’s actually two colliding galaxies or three. The fast radio burst came from a galaxy in the throes of a very messy galactic merger. ASKAP is extremely good at pinpointing the exact spot in the sky where a signal originates, so scientists first traced the fast radio burst to a tiny spot in space and then took a closer look with the Very Large Telescope, an optical telescope in Chile’s Atacama Desert. Ryder and his team, including astrophysicists from the International Centre for Radio Astronomy Research and other universities around the world, spotted the bright flash of radio waves with the Australian Square Kilometer Array Pathfinder (ASKAP), an array of 36 radio antennas in western Australia. Ryder and his colleagues published their work today in the journal Science. “One of my personal interests and reasons why I am excited about FRBs is to use them to study the intergalactic medium and the host galaxy interstellar medium gas (especially at high redshift), and combine that with other ways to study these media at other wavelengths,” Ryder tells Inverse. Now, in a new study, Macquarie University astrophysicist Stuart Ryder and his colleagues say that the bright flash of radio waves is a great example of a relatively new idea that FRBs could help calculate how much matter exists in the universe. This wasn’t any ordinary burst, as the FRB released about 3.5 times more energy than should be possible, at least according to current theories. In October 2022, astronomers detected a fast radio burst (FRB) - an extremely powerful blast of radio waves releasing huge amounts of energy in just a few milliseconds - in a high-redshift galaxy (meaning it was extremely far away). Luckily, some help is arriving from a galaxy some 8 billion light-years away in the form of ultra-bright radio waves. Sounds like I'm playing street fighter on steroids.How much does the universe weigh? It’s a simple question with an answer so complex that scientists have devised several ways to calculate the mass of, well, everything and arrived at many different answers. Info = Cultura| Música incrível Comment by Shamsterįor the longest time I've been pondering where this little ditty was from. Redshift = (Observed wavelength - Rest wavelength)/(Rest wavelength) Redshift is defined as the change in the wavelength of the light divided by the wavelength that the light would have if its source was not moving (called the rest wavelength). The change in wavelength of these lines is used to calculate the objects redshift. When an object in space moves toward or away from us, the absorption or emission lines will be found at different wavelengths than where they would be if the object was not moving (relative to us). These sets of lines are unique for each atomic element and always have the same spacing. The redshift of an object can be measured by examining the absorption or emission lines in its spectrum. This is because our Universe is expanding. Only a few objects, mainly local objects like planets and some nearby stars, are blueshifted. The light from most objects in the Universe is redshifted as seen from the Earth. When an object moves away from us, it's light waves are stretched into lower frequencies or longer wavelengths, and we say that the light is redshifted. When an object in space moves toward us it's light waves are compressed into higher frequencies or shorter wavelengths, and we say that the light is blueshifted. Original song: HertzDevil - Blueshift Galaxy
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