A group of astronomers led by the IPM Research Institute (IPM) with the participation of scientists from the Intellectual Institute of Astronomical Institute for Data Intensive Astronomy and the University of Axford The Meerkat Radio Telescope has been observed. Milra is a prefix for the world’s largest radio observatory, the square kilometer array (SKA). This study, for the first time, enables a comparative study of the radio spectrum, the intensity of the magnetic field, and the starry song of the galaxies at a time when the world was 2 to 5 billion years younger.
One of the most basic questions is how galaxies were formed and evolved in the universe. To answer this question, scientists must receive information from galaxies that are from billions of light years away. Almost all of our knowledge of the galaxies comes from radiation from radio beams to gamma. Observations in the visible light show that after a period of cosmic noon (2 to 5 billion years ago), the starry song in the galaxies gradually decreases. However, if we only rely on optical radiation, our understanding of the starry song will have a bias. Since radio radiation has a longer wave and is not influenced by interpersonal dust, it provides the most accurate information from the distant world.
Professor Ras Taylor, the main researcher at Meerkat International Ghz Tiered Extraggalactic Explore (MIGHTEE), said: “This encouraged us to deeply monitor several areas of the sky with the Meerkat radio telescope in South Africa. Located 2 kilometers from Carnavon’s small town in North Cape, the telescope is one of the SKA Observatory’s prefixes.
Professor Fatemeh Tabataba’i of the Institute of Fundamental Sciences, which led the research, says: Earlier, our radio observations across different galaxies have shown that radio radiation from 1 to 2 GHz is a powerful tool for measuring starring songs. Now, MIGHTEE’s mapping in combination with other radio mapping has made it possible to expand our studies to the initial galaxy in the cosmic noon and beyond.
“Our detailed analysis shows that the radio spectrum of these galaxies is changing with the starry song, and this can have important consequences for our understanding of the early star galaxies,” says Maryam Khademi
Radio radiation from 1 to 2 GHz is mainly caused by sycrotron radiation, which is emitted by high -energy electrons (cosmic beams) that have spirals in the midstine magnetic fields. Cosmic beams lose more energy when radiation of sycrotron in a stronger magnetic field. But the observed spectrum of the early galaxies shows that these cosmic beams have more energy in galaxies with more starry and a stronger magnetic field. This puzzle can only be solved when the cosmic rays are energy energy in the mechanism called magnetic mirrors and are separated from the magnetic field and withdrawn with the winds and currents out of the environment.
Professor Tabatabai says: This situation can occur if the magnetic fields in these systems are very intertwined and turbulent. The turbulent magnetic field causes cosmic rays to accelerate higher energy levels. These particles are then scattered and from the magnetic field. Therefore, it is expected that galaxies are expected to be surrounded by cosmic noon in the aura of high -energy cosmic beams. The pattern also explains the surplus of the infrared radiation that has been observed in this sample.
The results of this study are published in the journal Astrophysical Journal (DOI: 1/2/2/ADE۲۳۲) and are accessible through the link below:
(tagstotranslate) Oxford University (T) Institute of Fundamental Science (T) cosmology
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