Most of the stars in the Milky Way are single stars. But between one-third and one-half of them are binary stars. Can habitable planets form in these environments? New research shows that habitable planets could exist around binary stars, but they would form differently than worlds around single stars. A young binary star system about … Continue reading 'Planets in Binary Systems Could be Habitable, But They’d Form Differently'
,” published in the journal Nature. The lead author is Professor Jes K. Jørgensen from the Niels Bohr Institute at the University of Copenhagen. Professor Jørgensen is co-author of several papers on NGC 1333-IRAS2A. observations of NGC 1333-IRAS2A. These observations are only snapshots of a process that takes millions of years.
Young protostars are surrounded by protoplanetary disks made of gas and dust. Inside the disks, planets form mostly via accretion. After millions of years of chaos and collision, planets coalesce and take up orbits. It’s a highly complex process that scientists are studying intently. Solar systems like ours are simple in one way: there is only one star. The star’s mass and gravity influence the morphology and behaviour of the protoplanetary disk and the planets that form in the disk.
This figure from the study shows some of the activity at the binary protostar. The stars orbit their common center of gravity, shown with the black dot. When one of the stars absorbs an elevated amount of material, it flares in brightness and produces an outflow. Because of the binary motion of the protostars, the outflows are not bipolar. Image Credit: Jørgensen, Kuruwita et al. 2022.
This MHD simulation from the study shows accretion flows and outbursts from young binary protostars. Credit: Jørgensen, Kuruwita et al. 2022. Comet 67P as seen by Rosetta on 7 July 2015. By ESA/Rosetta/NAVCAM, CC BY-SA IGO 3.0, CC BY-SA 3.0-igo, https://commons.wikimedia.org/w/index.php?curid=41733207
ALMA can detect some of these chemicals, particularly in gaseous form. And it can see some complex chemistry. In this study, the authors detected several complex chemicals around the protostars.
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