The star Kappa 1 Ceti is one of the analogues of the Sun. It is located about 30 light-years from us – in cosmic terms, it can be called “a neighbor on the street.” According to preliminary estimates, it is from 600 million to 750 million years old. By the way, our Sun was about the same age when life originated on Earth.
According to Meng Jin, a SETI heliophysicist and co-author of the study, Kappa 1 Ceti has a mass and surface temperature similar to the Sun. All these factors make the star’s “twin” an important object for research.
We are analyzing a young star that in the future will be the same as the Sun. This means that we can study the past of the Sun, and this is simply incredible. Obtaining data on the young Sun will answer many questions related to the formation of the solar system.
Meng Jin, SETI Heliophysicist and co-author of the study.
For example, scientists have adapted the existing model of the Sun to predict some of the most important but difficult-to-measure characteristics of the Kappa 1 Ceti. The model is based on data from a variety of space missions including the NASA / ESA Hubble Space Telescope, the NASA Transiting Exoplanet Survey Satellite and NICER missions, as well as ESA’s XMM-Newton.
The basis for the new Kappa 1 Ceti model is the Sun model with Alfvén waves. It works by inputting known information about a star, including its magnetic field and ultraviolet radiation lines, to predict stellar wind activity. The model has already been tested on the Sun to make sure that the scientists’ predictions are correct.
Astronomers have published the study in The Astrophysical Journal.