An international team1, led by the Ispa Institute of Astrophysics and Kenya (IA2), recently discovered solar brothers and sisters. It is about 184 light-years away, is called HD 186302 and almost certainly is one of the long-lost brothers of our native star.
Solar brothers and sisters have a huge number of stars that form an indistinguishable huge group of the Sun about 4.6 billion years ago. Over time, the stars in the kitsch collapsed and scattered throughout our galaxy, making it extremely difficult to find them.
Vardan Adabekian (IA & University of Porto) explains the importance of finding these stars: "Since there is not much information about the Sun's past, studying these stars can help us understand where the Galaxy is and in what conditions the Sun has been formed. "
"With the help of Patrick de Laverny and Alejandra Recio-Blanco from the Cote d'Azur Observatory we received a sample of 230,000 AMBRE Spectra AMBRE is a galactic archeology project created by ESO and the Observatoire de la Côte d ' Azur to determine stellar atmospheric parameters for the ESO FEROS, HARPS4, UVES, and GIRAFFE spectrographs' archived spectra. "
Solar brothers and sisters can also be a great contender to seek life, as it is likely that life has been transported between the planets around the stars of the solar group. The exchange of life between exoplanetary frames is called interstellar lithospanism.
Adjebekan is cautiously excited about this possibility: "Some theoretical calculations show that there is a marginal probability that life will spread from Earth to other planets or exoplanetary systems during the late heavy bombing." If we are lucky, and our sister candidate has a planet and the planet is rocky type in the habitable zone, and finally, if this planet has been "polluted" by the living seeds of the Earth, then we have what we can dream about – Earth 2.0 that circles around Sun 2.0. "
The IA team plans to launch a search for planets around this star using the HARPS and ESPRESSO spectrometers. Finding and characterizing planetary systems around solar brothers and sisters can return very important information about the outcome of the formation of planets in a common environment.
The article is published in the journal Astronomy and Astrophysics.