J0815+4729 tagged posts

An international team of astronomers from the University of California San Diego, the Instituto de Astrofísica de Canarias (IAC), and the University of Cambridge have detected large amounts of oxygen in the atmosphere of one of the oldest and most elementally depleted stars known – a “primitive star” scientists call J0815+4729.

This new finding, which was made using W. M...

OSIRIS medium-resolution spectrum of J0815+4729 (black line) and the best fit obtained with FERRE (red line). Credit: Aguado et al., 2017.

Spanish astronomers have identified a new carbon-rich ultra metal-poor unevolved star in the halo of the Milky Way galaxy. The newly found star, designated J0815+4729, could be the most iron-poor unevolved star known to date. Chemically primitive metal-poor stars are important for studying the conditions in the early universe. Thus, astronomers are interested in identifying more stars of this type and deriving their chemical abundances. Large sample of such stars could be helpful in improving our knowledge about stellar formation and evolution.

Recently, a team led by David S...