The ripples in the Milky Way disk are shown, along with the tidal debris from the Sagittarius dwarf galaxy. The pulsars analyzed by Chakrabarti and collaborators to calculate galactic accelerations are shown in the inset. IAS; Dana Berry
It is well known that the expansion of the universe is accelerating due to a mysterious dark energy. Within galaxies, stars also experience an acceleration, though this is due to some combination of dark matter and the stellar density. In a new study to be published in Astrophysical Journal Letters, researchers have now obtained the first direct measurement of the average acceleration taking place within our home galaxy, the Milky Way.
Led by Sukanya Chakrabarti at the Institute for Advanced Study with collaborators from Rochester Institute of Techn...
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