A team of astronomers from Switzerland and Germany has conducted a long-term multi-band photometric monitoring of a nearby blazar known as Markarian 501. The observational campaign delivered essential information regarding ...
Galaxies host supermassive black holes, which weigh millions to billions times more than the sun. When galaxies collide, pairs of supermassive black holes at their centers also lie on the collision course. It may take millions ...
Astronomy
Sep 13, 2021
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In 1929, Edwin Hubble published observations that galaxies' distances and velocities are correlated, with the distances determined using their Cepheid stars. Harvard astronomer Henrietta Swan Leavitt had discovered that a ...
Astronomy
Sep 13, 2021
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Using XMM-Newton and Swift space telescopes, Chinese astronomers have inspected short-term X-ray variability of a tidal disruption event known as Swift J1644+57. Results of the study, published August 12 on the arXiv pre-print ...
Using the Very Energetic Radiation Imaging Telescope Array System (VERITAS), an international team of astronomers has conducted long-term observations of a gamma-ray blazar known as TXS 0506+056. Results of the observational ...
At the center of galaxies, like our own Milky Way, lie massive black holes surrounded by spinning gas. Some shine brightly, with a continuous supply of fuel, while others go dormant for millions of years, only to reawaken ...
Astronomy
Aug 17, 2021
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The feeding patterns of black holes offer insight into their size, researchers report. A new study revealed that the flickering in the brightness observed in actively feeding supermassive black holes is related to their mass.
Astronomy
Aug 12, 2021
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Using the eROSITA telescope onboard the Spektr-RG (SRG) spacecraft, astronomers have detected 13 new tidal disruption events (TDEs). This is the first time when Spektr-RG identifies such events. The discovery is reported ...
Researchers from Western Sydney University and CSIRO, Australia's national science agency, have discovered strange clouds of electrons surrounding galaxies deep in the cosmos. The clouds, which are about a billion light years ...
Astronomy
Aug 4, 2021
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641
The black holes at the centers of galaxies are the most mysterious objects in the Universe, not only because of the huge quantities of material within them, millions of times the mass of the sun, but because of the incredibly ...
Astronomy
Jul 30, 2021
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