Perseus galaxy cluster tagged posts

NASA this week shared an audio clip on social media that allows you to “hear” a black hole.
No surprise, the sound is terrifying.

NASA Exoplanets, a team at the agency focused on planets and other information outside of our solar system, tweeted the 34-second clip on Sunday and said there’s a “misconception” that there is no sound in space.

But they explained that “A galaxy cluster has so much gas that we’ve picked up actual sound. Here it’s amplified, and mixed with other data, to hear a black hole.”

NASA initially released the so-called “sonification” earlier this year, explaining that researchers have “associated” the black hole in the Perseus galaxy cluster with sound since 2003.

“This is because astronomers discovered that pressure wave...

This X-ray image of the hot gas in the Perseus galaxy cluster was made from 16 days of Chandra observations. Researchers then filtered the data in a way that brightened the contrast of edges in order to make subtle details more obvious. An oval highlights the location of an enormous wave found to be rolling through the gas. Credit: NASA’s Goddard Space Flight Center/Stephen Walker et al

Combining data from Chandra X-ray Observatory with radio observations and computer simulations, an international team has discovered a vast wave of hot gas in the nearby Perseus galaxy cluster. Spanning 200,000 light-years, the wave is about twice the size of our own Milky Way galaxy...

Illustration of how light is transformed into ALP by the galaxy. Credit: Credits to Aurore Simonnet, Sonoma State University (for the active galaxy core) and to NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring (for image of earth).

Researchers at Stockholm University are getting closer to corner light dark-matter particle models. Observations can rule out some axion-like particles in the quest for the content of dark matter.

Physicists are still struggling with the conundrum of identifying more than 80% of the matter in the Universe. One possibility is that it is made up by extremely light particles which weigh less than a billionth of the mass of the electron. These particles are often called axion-like particles (ALPs)...