Astronomers Just Revealed The Sharpest Ever Image of a Star in Another Solar System November 22, 2018







A worldwide team of astrophysicists from Chile and Germany has figured out how to catch a picture of exceptional detail of another star — that isn't the Sun — the red supergiant star Antares. The group has additionally made the first map of the speeds of material in the atmosphere of a star other than the Sun.







The map uncovers surprising disturbance in the all-inclusive atmosphere of Antares. Antares, additionally assigned Alpha Scorpii, is a well-studied, close red supergiant star at a distance of 554 light years. It is the fifteenth-most shinny star in the night sky and the most bright star in the constellation of Scorpius. With a dimension around 700 times that of the Sun and a mass around 12 times solar, Antares is one of biggest stars.


It is believed that Antares existed with a mass more like 15 times that of the Sun, and has shed three solar-masses of material amid its life. To specifically observe the gas movements in its atmosphere, Dr. Keiichi Ohnaka of the Universidad Católica del Norte in Chile and co-creators surveyed Antares with ESO's Very Large Telescope Interferometer (VLTI) situated on Cerro Paranal in Chile. 




"How stars like Antares lose mass so rapidly in the last period of their development has been an issue for over 50 years," Dr. Ohnaka said. "VLTI is the main office that can specifically gauge the gas movements in the all-encompassing environment of Antares — an essential advance towards explaining this issue. The following test is to distinguish what's driving the uncontrolled movements."



This is the clearer picture ever of the red supergiant star Antares, or some other star beside the Sun. Picture credit: K. Ohnaka/ESO.



The cosmologists prepared the first two-dimensional speed map of the atmosphere of a star other than the Sun. They did this using the VLTI with three of the Auxiliary Telescopes and an instrument called AMBER to make separate pictures of the surface of Antares over a little range of infrared wavelengths.


They at that point employed these information to figure the dissimilarity between the speed of the atmospheric gas at various positions on the star and the normal speed over the whole star. This brought about a map of the overall speed of the atmospheric gas over the whole circle of Antares — the first ever formed for a star other than the Sun.

 “We found violent, low-thickness gas a lot further from the star than expected," the inventors said. "The movement couldn't result from convection, that is, from huge scale movement of matter which exchanges energy from the center to the external atmosphere of numerous stars. Another, right now obscure, process might be expected to clarify these movements in the extended atmospheres of red supergiants like Antares."



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