A New Technique Finds a Bundle of Brown Dwarfs - Universe Today by spacewriter
Image of a brown dwarf discovered around the star HIP 21152, obtained with the Very Large Telescope SPHERE instrument. © M. Bonavita et al., MNRAS, July 2022, https://doi.org/10.1093/mnras/stac1250The team beat the odds by looking for what’s called wide-orbit brown dwarfs. They travel far from their stars which makes them easier to find once you know where to look.
“An alternative approach to increase the number of detections is to only observe stars that show indications of an additional object in their system”, explained Fontanive. For example, the way a star moves under the gravitational tug of a companion can be an indicator of the existence of that companion, whether it is a star, a planet, or something in between. This is where the COPAINS tool came in handy. It predicts the types of companions that might tug on a star and influence its motions.
“This result was only possible because we believed that, when combining space and ground-based facilities to directly image exoplanets, the whole is greater than the sum of its parts,” said Bonavita. “We hope that this will be the start of a new era of synergy between different instruments and detection methods.”
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