Hubble gazes at R Sculptoris and its hidden companion

Hubble gazes at R Sculptoris and its hidden companion
Credit: ESA/Hubble, NASA

This NASA/ESA Hubble Space Telescope image shows the region around a star known as R Sculptoris, a red giant located 1,500 light-years from Earth in the constellation of Sculptor. Recent observations have shown that the material surrounding R Sculptoris actually forms a spiral structure—a phenomenon probably caused by a hidden companion star orbiting the star. Systems with multiple stars often lead to unusual or unexpected morphologies, as seen, for example, in the wide range of striking planetary nebulae that Hubble has imaged.

R Sculptoris is an example of an (AGB) star. All stars with initial masses up to about eight times that of the sun will eventually become in the later stages of their lives. They start to cool down and lose a large amount of their mass in a steady, dense wind that streams outwards from the star. With this constant loss of material, red giants like R Sculptoris provide a good portion of the raw materials—dust and gas—used for the formation of new generations of stars and planets. They also show what is likely to happen to the sun in a few billion years from now, and help astronomers to understand how the elements we are made up of are distributed throughout the universe.

R Sculptoris itself is located outside the plane of the Milky Way and is easily visible using a moderately sized amateur telescope. In this part of the sky far from the galactic plane, there are relatively few but many faint and distant galaxies can be seen. The center of the image is blackened to cover the star itself, allowing its surrounding gas to be more easily seen.


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Citation: Hubble gazes at R Sculptoris and its hidden companion (2015, January 14) retrieved 21 May 2019 from https://phys.org/news/2015-01-hubble-sculptoris-hidden-companion.html
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Jan 14, 2015
Any companion could be a planet. It would be good to take several photos over a period of time to see how the gas is changing. In our own solar system the hot gas from the sun seems to be controlled more by magnetic fields, so a polarimetric study of the light polarization may reveal much. Particularly when combined with the time domain, perhaps the field of a companion can be revealed.

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