Quasi-periodic pulsations (QPPs; also known as quasi-periodic oscillations, i.e., QPOs) are electromagnetic emission phenomena that vary quasi-periodically with time. They appear in celestial transient events with different ...
Astronomy
Jan 4, 2023
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54
A Dutch-Italian-German team of astronomers has observed a huge glow of radio emission around a cluster of thousands of galaxies. They combined data from thousands of LOFAR antennas that were focused for 18 nights on an area ...
Astronomy
Nov 2, 2022
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289
An international team of astronomers has inspected a tidal disruption event (TDE) known as AT2020opy using various radio telescopes. Results of the study, published August 30 on the arXiv pre-print server, could shed more ...
The universe is littered with galaxy clusters—huge structures piled up at the intersections of the cosmic web. A single cluster can span millions of light-years across and be made up of hundreds, or even thousands, of galaxies.
Astronomy
Aug 1, 2022
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151
Brown dwarfs are known as "failed stars," owing to the lack of central hydrogen burning. They bridge the gap between planets and stars. Some brown dwarfs are found to maintain kilogauss magnetic fields and produce flaring ...
Astronomy
Jul 8, 2022
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126
More than 50 years after the discovery of the first pulsar, the detailed physics of the emission process in a pulsar magnetosphere still remains unclear.
Astronomy
Jun 29, 2022
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11
As a result of achieving high imaging dynamic range, a team of astronomers in Japan has discovered for the first time a faint radio emission covering a giant galaxy with an energetic black hole at its center. The radio emission ...
Astronomy
Jun 3, 2022
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798
The presence of unusually energetic gamma rays seen in some afterglows from intense gamma-ray bursts (GRBs) could be explained by a new mathematical model developed by RIKEN researchers. This finding could help to shed light ...
Astronomy
Apr 4, 2022
0
248
Astronomers may have detected a "sonic boom" from a powerful blast known as a kilonova. This event was seen in GW170817, a merger of two neutron stars and the first object detected in both gravitational waves and electromagnetic ...
Astronomy
Mar 7, 2022
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29
For a mission that has just entered its primary science phase, Solar Orbiter has already produced many remarkable results. Released on December 14, 2021, a special issue of Astronomy and Astrophysics brings together a wealth ...
Astronomy
Feb 15, 2022
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22
