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Hubble Watches Waltzing Dwarfs

Saturday, June 10, 2017 22:25

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This seemingly unspectacular series of dots with varying distances between them actually shows the slow waltz of two brown dwarfs.

The observed system, Luhman 16AB, is only about six light-years away and is the third closest stellar system to Earth — after the triple star system Alpha Centauri and Barnard’s Star. Despite its proximity, Luhman 16AB was only discovered in 2013 by the astronomer Kevin Luhman. The two brown dwarfs that make up the system, Luhman 16A and Luhman 16B, orbit each other at a distance of only three times the distance between the Earth and the sun, and so these observations are a showcase for Hubble’s precision and high resolution.

Credits: ESA/Hubble & NASA

The image is a stack of 12 images made over the course of three years with the NASA/ESA Hubble Space Telescope. Using high-precision astrometry, an Italian-led team of astronomers tracked the two components of the system as they moved both across the sky and around each other.

Credits: ESA/Hubble & NASA, L. Bedin et al.

The astronomers using Hubble to study Luhman 16AB were not only interested in the waltz of the two brown dwarfs, but were also searching for a third, invisible, dancing partner. Earlier observations with the European Southern Observatory’s Very Large Telescope indicated the presence of an exoplanet in the system. The team wanted to verify this claim by analyzing the movement of the brown dwarfs in great detail over a long period of time, but the Hubble data showed that the two dwarfs are indeed dancing alone, unperturbed by a massive planetary companion.

Contacts and sources:

Robert Gutro

NASA/Goddard Space Flight Center

European Space Agency

Source:

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Comments

Total 1 comment

Jango

A very amature hoax video.

Jul 6, 2017, 6:22 pm 0 Reply

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