New Milky Way map reveals huge wave of stellar nurseries

New York: Astronomers at Harvard University have discovered a wave-shaped gaseous structure — the largest ever seen in our galaxy — made up of interconnected stellar nurseries.

Dubbed the “Radcliffe wave” in honour of the Radcliffe Institute for Advanced Study, the discovery transforms a 150-year-old vision of nearby stellar nurseries as an expanding ring into one featuring an undulating, star-forming filament that reaches trillions of miles above and below the galactic disk.

The team analyzed data from the European Space Agency’s Gaia spacecraft, launched in 2013.

It combined the super-accurate data from Gaia with other measurements to construct a detailed, 3D map of interstellar matter in the Milky Way and noticed an unexpected pattern in the spiral arm closest to the Earth.

They discovered a long, thin structure, about 9,000 light-years long and 400 light-years wide, with a wave-like shape, cresting 500 light-years above and below the mid-plane of our Galaxy’s disk.

“No astronomer expected that we live next to a giant, wave-like collection of gas - or that it forms the Local Arm of the Milky Way,” said Alyssa Goodman from Harvard University.

“The Wave’s very existence is forcing us to rethink our understanding of the Milky Way’s 3D structure,” said Goodman, also co-director of the Science Programme at the Radcliffe Institute of Advanced Study. (IANS)

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