Spinning Stars Shed New Light On Strange Signal Coming From Galactic Center

Well maybe.  We have an excess of gamma rays out of the Galactic center and we have had plenty from other galaxies as well.  I normally think of active event horizons.  Thus I expect to see an increase in gamma rays from the core.

Spinning pulsers are almost point sources and likely widely distributed.  so are event horizons.

anything else  is super speculative as is all this.  The main thing we know is that gamma rays show up in the Core which we really cannot see very well.  I suspect that we are premature in our interpretations.  We need to get event horizons right first.

Spinning Stars Shed New Light On Strange Signal Coming From Galactic Center

4/28/2022 10:00:00 AM

https://archaeologynewsnetwork.blogspot.com/2022/04/spinning-stars-shed-new-light-on.html

Researchers from The Australian National University (ANU) have found an alternative explanation for a mysterious gamma-ray signal coming from the center of the galaxy, which was long claimed as a signature of dark matter. Gamma-rays are the form of electromagnetic radiation with the shortest wavelength and highest energy.

View of the gamma-ray sky [Credit: NASA/DOE/Fermi LAT Collaboration]

Co-author of the study Associate Professor Roland Crocker said this particular gamma-ray signal—known as the Galactic Center Excess—may actually come from a specific type of rapidly-rotating neutron star, the super-dense stellar remnants of some stars much more massive than our sun.

The Galactic Center Excess is an unexpected concentration of gamma-rays emerging from the center of our galaxy that has long puzzled astronomers. "Our work does not throw any doubt on the existence of the signal, but offers another potential source," Associate Professor Crocker said.

"It is based on millisecond pulsars—neutron stars that spin really quickly—around 100 times a second. Scientists have previously detected gamma-ray emissions from individual millisecond pulsars in the neighborhood of the solar system, so we know these objects emit gamma-rays. Our model demonstrates that the integrated emission from a whole population of such stars, around 100,000 in number, would produce a signal entirely compatible with the Galactic Center Excess."

The discovery may mean scientists have to re-think where they look for clues about dark matter. "The nature of dark matter is entirely unknown, so any potential clues garner a lot of excitement," Associate Professor Crocker said. "But our results point to another important source of gamma-ray production. For instance, the gamma-ray signal from Andromeda, the next closest large galaxy to our own may be mostly due to millisecond pulsars."

The research has been published in Nature Astronomy.