Surprising Spiral Structure Spotted by ALMA. New observations reveal the secrets of a dying star WWW.GOODNEWS.WS

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Zooming into the red giant star R Sculptoris: This video sequence starts with a view of the rather faint constellations of Sculptor (The Sculptor) and Cetus (The Sea Monster). As we zoom in we see a few faint galaxies but close in on a star that looks very red. This is the old red giant variable star R Sculptoris. Observations using the Atacama Large Millimeter/submillimeter Array (ALMA) have revealed an unexpected spiral structure in the material around this star. Credit: ESO/A. Fujii/Digitized Sky Survey 2. - Model of the evolution of the material around the old star R Sculptoris over 2000 years: This video is a computer model of the evolution of the material around the old red giant star R Sculptoris over a period of 2000 years. This star experiences thermal pulses that lead to the ejection of material from its surface. Astronomers think that the strange spiral structure is the result of the presence of a companion star in orbit around the red giant. Credit:Nature/M. Maercker et al./S. Mohamed/L. Calçada. - Slicing through a 3D model of the material around the red giant star R Sculptoris: Observations using the Atacama Large Millimeter/submillimeter Array (ALMA) have revealed an unexpected spiral structure in the material around the old star R Sculptoris. This spiral, along with the surrounding outer shell, has never been seen before and is probably caused by a hidden companion star orbiting the star. This new video shows a computer simulation of how the material is distributed around the star. It presents a series of slices through a 3D model of the surroundings of R Sculptoris. The shell around the star shows up as a circular ring that appears to get bigger and then smaller in different slices. The newly discovered clear spiral structure in the inner material is best seen about half-way through the video sequence. Credit: ESO/S. Mohamed (SAAO), L. Calçada. -- Slicing through a 3D ALMA view of the material around the red giant star R Sculptoris: Observations using the Atacama Large Millimeter/submillimeter Array (ALMA) have revealed an unexpected spiral structure in the material around the old star R Sculptoris. This spiral is probably caused by a hidden companion star orbiting the star. This new ALMA video shows a series of slices through the data, each taken at a slightly different frequency. These reveal the shell around the star, appearing as a circular ring, that seems to gets bigger and then smaller, as well as a clear spiral structure in the inner material that it best seen about half-way through the video sequence.Credit:ALMA (ESO/NAOJ/NRAO), L. Calçada. Read the full story »

Surprising Spiral Structure Spotted by ALMA. New observations reveal the secrets of a dying star WWW.GOODNEWS.WS
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