Aging red star pictured blowing smoky bubble

With the help of the ALMA observatory, astronomers have captured images of a smoky bubble of debris expelled by the unusual red star, U Antliae.

U Antliae is a carbon star, a type of luminous red giant noted for its sooty-looking, carbon-rich atmosphere and rub red appearance.

Over the last several thousand years, U Antliae has experienced a dramatic evolution, rapidly shedding mass and, most recently, expelling a shell of material at extreme speed.

The impressive resolution of the new image was made possible by the ability of the ALMA radio telescope to field multiple wavelengths.

In addition to making for a stunning image, ALMA’s multi-wavelength dataset can also be used to slice through the bubble and study the debris shell in 3D.

The Doppler effect allowed astronomers to measure the direction and velocity of different slices of the bubble.

The smoky shell is surprisingly thin and round. ALMA’s analysis also revealed wispy filamentary substructures within the bubble of dust and gas.

UCJ, UNILORIN.