πŸ“° Astronomers detect radio ‘heartbeats’ billions of light-years from Earth

Astronomers at McGill University, MIT and elsewhere have detected a strange and persistent radio signal from a distant galaxy that appears to flicker with amazing regularity. Classified as a fast radio burst, or FRB, this new sign (General terms A signal is a simplified and usually coded message. There is…) it persists for up to three seconds, about 1000 times longer than the average FRB. In this window (In architecture and construction, a window is an opening, an opening in a wall or a pan…)the team detected bursts ofwaves (A wave is the propagation of a disturbance that produces a reversible variation in its path…) radio that repeats every 0.2 seconds in a clear periodic pattern.


The CHIME radio telescope consists of four 100-meter-long U-shaped cylinders made of wire mesh, which look like the crescents of a skateboard. snow (Snow is a form of precipitation, consisting of crystallized ice and…) and whose total area is equivalent to that of five hockey rinks. CHIME recomposes the image of the darling (The sky is Earth’s atmosphere as seen from the planet’s ground.) processing the radio signals captured by more than a thousand antennas. (Source: CHIME)

The researchers labeled the signal FRB 20191221A. It is currently the longest lasting FRB, with the clearest periodic pattern, detected to date. day (The day or the day is the interval that separates the sunrise from the sunset; it is the…). The discovery is reported today in the journal Nature and is written by members of the CHIME/FRB collaboration.

On December 21, 2019, the telescope (A telescope, (from the Greek tele meaning “far” and skopein meaning…) CHIME picked up a signal from a potential FRB, which immediately caught the attention of Daniele Michilli, who noticed something unusual while scanning the data (In information technology (IT), data is an elementary description, often…) starters.

“Not only was it very long, lasting about three seconds, but there were periodic spikes that were remarkably precise, emitting every fraction of a the second (Second is the feminine of the second adjective, which comes immediately after the first or which…) – boom, boom, boom – like a defeat (In acoustics, the compass is an interference between two sounds of frequency…) heart,” recalls Michilli, who led the discovery, first as a researcher at theMcGill University (McGill University, located in Montreal, Quebec, is one of…), then as a postdoctoral fellow at MIT. “This is the first time that the signal itself is periodic.”

“There aren’t many things in theuniverse (The Universe is the sum of everything that exists and the laws that govern it). that emit strictly periodic signals,” adds Aaron Pearlman, FRQNT postdoctoral fellow at theInstitute (An institute is a permanent organization created for a specific purpose. It is…) space McGill, who also contributed to the article. “The examples we know of in our own galaxy (A galaxy is, in cosmology, a set of stars, gas, dust and…) they are radio pulsars and magnetars, which rotate and produce an emission beam similar to a lighthouse. And we believe that this new signal could be a magnetar (A magnetar is a neutron star with a hyperpotent magnetic field, which emits…) or a press (A pulsar is the name given to a neutron star, which rotates very…) on steroids.”

The team hopes to detect more periodic signals from this source, which could then be used as a clock. astrophysics (Astrophysics (from the Greek astro = star and physiqui = physics) is a branch…). For example, him frequency (In physics, frequency generally refers to a measure of the number of times that…) bursts, and how they change as the source moves away from the Land (Earth is the third planet in the Solar System in order of distance…)could be used to measure the vitesse (In distinguishes πŸ™‚ in which the universe expands.

Publication:
Written in collaboration with Jennifer Chu, MIT News (NeWS is a window system designed by James Gosling (who contributed…) Office
β€œSub-second Periodicity in a Fast Radio Burst” by Bridget Andersen et al. in Nature
DOI: https://doi.org/10.1038/s41586-022-04841-8

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