A group of international astronomers reported the discovery of an "accompany" with the M-sion star called TOI-1278. The newly discovered object turned out to be a brown yellow star nearly 20 times heavier than Mars. The discovery is presented in detail in an article published on June 8 on the arXiv page.
The brown cos cos cos cosmic star is an intermediate object between planets and stars, with a mass of 13 to 80 times that of Mars. Although many browneds have been discovered so far, such objects around other stars are rare.
Now, a team of astronomers led by Etienne Artigau of the University of Montreal has discovered a new rare brown yellow star in a pair of star systems. Using the Canada-France-Hawaii Tennis kinh (CSHT), they discovered that the M0V spectrum TOI-1278 was surrounded by a large object.
"In deeper analysis shows that this is the movement of an object as large as a Mars star. RRV monitoring with SPIRou near-infrared speeds and the SLS spectrum measuring device conducted at the Canada-France-Hawaii Tennis yet (CSHT) led to the detection of the Kepler RV signal with a radius of 2,306 ± 10 m/s per phase and a filming time of 14.5 days," the astronomers explained.
The newly discovered brown cos cos cos cos star has the symbol TOI-1278 B; therefore, the star is named TOI-1278 A. The brown cos cos star rotates around the star once every 14.5 days and its trajectory has a slight deviation but is different from 0.
According to the article, TOI-1278 B has a radius of about 0.97 Mars and weighs 18.5 times more than the largest planet in our solar system. Therefore, its density is approximately 18 g/cm3.
Observations show that TOI-1278 B is about 0.095 AU away from TOI-1278 A. Because TOI-1278 A has a mass about 31 times greater than its companion, such a short distance makes TOI-1278 the only of the M-shaped star systems known.
"The number of browneds that are known to be in close orbit around the main sequence stars is relatively small, although they are generally easier to find than companion planets. While most of the accompanying stars like the Sun revolve around stars, TOI-1278 combines relatively rare properties; there are some close companions (<0.1 AU) with a larger mass than Mars," the researchers explained.
The papers authors estimate that TOI-1278 is located about 244 light years away from Earth. They also believe that this system is 1.4 to 7.6 billion years old.
