Led by Sukanya Chakrabarti of the Institute for Advanced Study, a team of scientists
Ripples in the disc of the Milky Way are shown, as well astidal debris of the Sagittarius dwarf galaxy. The inset shows pulsars analyzed by Chakrabarti et al. In 2021 to calculate the acceleration of the galaxy. Photo: IAS; Dana Berry
“Our analysis not only gives us the first dimensiontiny accelerations that stars in the galaxy experience, but also opens up the possibility of expanding work to understand the nature of dark matter and, ultimately, dark energy, ”said Chakrabarti, lead author of the article.
Stars rush through the galaxy at hundreds of speedskilometers per second, but new research shows that the change in their speed occurs much more slowly - a few centimeters per second. To detect this subtle movement, the research team relied on the ultra-precise time-keeping ability of pulsars, which are widely distributed across the galactic plane and halo, a diffuse spherical region surrounding the galaxy.
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