More than a thousand powerful cosmic explosions were detected by the telescope in 47 days

More than a thousand powerful cosmic explosions were detected by the telescope in 47 days
More than a thousand powerful cosmic explosions were detected by the telescope in 47 days

FRB picks up a true heartbeat faster than 121102. Credit: NAOC

Professors LI Di and Drs. An international research team led by WANG Pei captured the intense occurrence of cosmic explosions from Fast Radio Burst (FRB) 1211102 using five meters. Aperture (fast) radio telescope. A total of 1,652 independent eruptions were detected within the 47 days as of August 29, 2019 (UT).

This is by far the largest set of FRP events, more than the number included in all the other releases. This explosive array allows, for the first time, to determine the characteristic power and power distribution of any FRB, thus exposing the central drive FRBs.

These results have been published temper nature On October 13, 2021.

FRBs were first discovered in 2007. These cosmic explosions produce less than a millisecond when producing a one-year value of the sun’s total energy output. The origin of FRBs is not yet known. Although aliens are also considered in FRBs models, it is clear that natural causes are favored by observations. Recent focus includes attractive, highly magnetized neutron stars, black holes, and cosmic strings. the great explosion.

Burst rate distribution of isotropic equivalent power at 1.25 GHz to FRB 121102. Credit: NAOC

Scientists have found that a small portion of FRBs repeat. This phenomenon facilitates follow-up studies, including the localization and identification of FRBs host galaxies.

FRB 121102 was the first known repeater and the first well translated FRB. Scientists have determined its origin in a dwarf galaxy. In addition, this FRB is clearly associated with a continuous radio source. Both clues are important in solving the cosmic mystery of FRBs. The behavior of FRB 121102 is difficult to predict and is usually described as “seasonal”.

While testing the FAST FRB backlight during the run-in phase, the team noted that FRB 1211102 often works with brilliant lentils. Between August 29 and October 29, 2019, a total of 1,652 independent explosive events were detected in 59.5 hours. When the blast rhythm varied throughout the series, 122 blasts were observed at peak times, which corresponds to the highest ever incidence rate of any FRB.

A ‘river’ erupts from a galaxy recorded by a fast telescope. The number of revolutions and energies are displayed on the charts, reflecting Wang Jimenez’s “wide ground” drawing of the song’s dynasty. credit: NAOC

This high coding facilitates the statistical analysis of these FRB bursts. The researchers discovered the distinct, distinct energy of E.= 4.8 1037 Erg, generating explosions underneath is less efficient. The explosive energy distribution can be described appropriately, i.e. a standard function for low-emission explosions and a Lorentz function for high-E explosions, weak FRB pulses may be inherent in nature and strong pulses that include the ratio between the two independent sizes.

“The total energy of this explosive charge already adds up to 3.8% and no time interval between 1 millisecond and 1,000 seconds was observed, both of which severely limit the potential for FRB 121102 to escape from isolated composites,” said Dr. Wang.

More than six new FRBs were discovered by the Commensal Radio Astronomy Rapid Survey (CRAFTS,, including a new 121102 repeater. “As the world’s largest antenna, FAST sensitivity has proven ideal for exposing the problems of cosmic transients, including FRBs,” said Professor LI.

This project is part of a long-term collaboration from the operational phase of the Fast Telescope. Key stakeholders include Zhigoff Normal, University of Las Vegas, Nevada, Cornell University, Max Planck Foer Institute for Radio Astronomy, West Virginia University, CSIRO, University of California, Berkeley and Nanjing.

He pointed out. Lee, b. Wang, W. W.; Joe, b. Chang, XX. Chang, p. Duan, Y. Ke Jong, Y. Feng, N.Y. Tong, s. Chatterjee, J.M.; Curtis, M.; Cruz, S.; Toei, F.; Kajjar, c. Hobbs, c. Jane, M.; Kramer, Dr. Lorimer, CC Miu, CH Neo, JR Neo, Isazzi Ban, L. Qian, L. Spitler, D.; Verdimer, Xi Qi Zhang, FY Wang, XY Xi, YLU, L Zhang, QJ Ji and Yu Ju, October 13, 2021, temper nature.
DOI: 10.1038 / s41586-021-03878-5

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