Utilizing Spektr-RG and Fermi space observatories, German astronomers have investigated the supernova remnant SNR G309.8+00.0 in X-rays and gamma rays. Outcomes of the new study, introduced June 25 on the preprint server arXiv, ship essential insights into the properties of this supernova remnant.
Supernova remnants (SNRs) are diffuse, increasing buildings ensuing from a supernova explosion. They include ejected materials increasing from the explosion and different interstellar materials that has been swept up by the passage of the shockwave from the exploded star.
Research of supernova remnants are essential for astronomers, as they play a key position within the evolution of galaxies, dispersing the heavy elements made within the supernova explosion and offering the vitality wanted for heating up the interstellar medium. SNRs are additionally believed to be answerable for the acceleration of galactic cosmic rays.
SNR G309.8+00.0 is a supernova remnant mendacity precisely on the galactic plane, first found in radio wavelengths about half a century in the past. It seems as a well-defined shell of elliptical form and a dimension of 25 by 19 arcminutes. The space to SNR G309.8+00.0 is estimated to be between 10,000 and 18,000 mild years.
Though SNR G309.8+00.0 has been recognized for many years, it has not been detected at another wavelengths. Now, a crew of astronomers led by Miltiadis Michailidis of the Institute for Astronomy and Astrophysics Tübingen in Germany has determined to alter this by exploring this SNR in X-ray and gamma-ray bands.
“We current the primary examine of the well-established, from radio observations, SNR G309.8+00.0 at greater energies,” the researchers wrote within the paper.
The observations present that the X-ray emission from SNR G309.8+00.0 is especially confined to the 1–2 keV vitality vary. The X-ray emission has an elliptical form and the remnant’s shell-type look is in good spatial correlation with the radio synchrotron emission from the SNR. The X-ray emission primarily fills the southern half of the remnant’s shell.
The examine discovered that the numerous fraction of the gamma-ray emission noticed in SNR G309.8+00.0 comes from the supply recognized as 4FGL J1349.5-6206c. Additional evaluation allowed the crew to decompose this supply into 4 point-like parts, amongst which one is spatially coincident with the shell of SNR G309.8+00.0.
Based mostly on the collected knowledge, the authors of the paper assume that the space to SNR G309.8+00.0 is at the least 19,500 mild years; due to this fact the remnant is positioned farther away than beforehand thought. This implies that the age of the SNR is between 100,000 and 350,000 years.
Extra data:
Miltiadis Michailidis et al, A have a look at the excessive vitality features of the supernova remnant G309.8+00.0 with eROSITA and Fermi-LAT, arXiv (2024). DOI: 10.48550/arxiv.2406.17493
Journal data:
arXiv
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German scientists examine supernova remnant SNR G309.8+00.0 at excessive energies (2024, July 2)
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