A global group of stargazers has found eight of the most sultry stars known to man, all with surfaces blazing at more than 100,000 degrees Celsius. The work was distributed in a month-to-month notification of the Regal Cosmic Culture.
The paper depends on information assembled utilizing the Southern African Huge Telescope (SALT), the biggest single optical telescope in the southern half of the globe, with a 10 m x 11 m mirror. The review describes how a study of helium-rich subdwarf stars prompted the revelation of a few hot white midget and pre-white small stars, the most sultry of which has a surface temperature of 180,000 degrees Celsius. For correlation, the sun’s surface is a simple 5,800 degrees.
One of the stars recognized is the focal star of a newly discovered planetary cloud, which is one light year in width. Two of the others are throbbing, or “variable” stars. These stars are in a high-level phase of their life cycle and are moving toward the finish of their lives as white midgets. Because of their extremely high temperatures, each of these new discoveries is many times brighter than the sun, which is unusual for white, small stars.
“Effective temperatures of 100,000 degrees Celsius or greater in stars are extremely rare. It was a pleasant surprise to discover so many of these celebrities in our poll. These discoveries will help us better understand the late stages of star evolution, and they show that SALT is an excellent instrument for our purpose.”
Simon Jeffery, an astronomer at the Armagh Observatory and Planetarium
White midgets are generally a similar size to planet Earth, yet multiple times more massive, with masses nearer that of the sun’s. They are the densest stars in the universe made up of ordinary matter.Pre-white midgets are a couple of times greater and will shrink to become whiter, smaller people inside two or three thousand years.
Simon Jeffery, a stargazer at the Armagh Observatory and Planetarium who drove the examination, expresses, “Stars with viable temperatures of 100,000 degrees Celsius or higher are amazingly uncommon.” It was a genuine shock to see so many of these stars in our study. These revelations will assist with expanding how we might interpret the late phases of heavenly development, and they show that SALT is a fabulous telescope for our task. He adds, “It has been energizing to work with an accomplished group, who all in all empowered the disclosure of the stars, the examination of their climates, and the revelation of throbs and a cloud in a short space of time.”
The College of Tuebingen’s teacher Klaus Werner, who co-wrote the paper, remarks, “I’m glad to have fostered this pivotal exploration.” “The revelation of eight hot white midget and pre-white small stars and another planetary cloud is massively huge, and we trust that these discoveries will assist in revealing new insight into the arrangement of our world.”
Dr. Itumeleng Monageng, of the Branch of Cosmology, College of Cape Town, and South African Galactic Observatory, notes, “It is a distinction to have had an impact in this fantastic disclosure.” The SALT study of helium-rich hot subdwarfs was planned to investigate developmental pathways among gatherings of profoundly advanced stars.
“It is entrancing to have found eight new very hot stars all the while, one of which is encircled by a planetary cloud.”
More information: C S Jeffery et al, Hot white dwarfs and pre-white dwarfs discovered with SALT, Monthly Notices of the Royal Astronomical Society (2023). DOI: 10.1093/mnras/stac3531
