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Mysterious isolated object investigated by astronomers (STA BREAKING NEWS and ARCHIVES)

by Theresa @, Thursday, March 16, 2017, 00:40

An international team of astronomers led by Philippe Delorme of the Grenoble Alpes University in France has recently investigated a mysterious object designated CFBDSIR J214947.2-040308.9 (CFBDSIR 2149-0403 for short) in order to reveal its true nature. The object is assumed to be a young isolated planetary-mass object or a high-metallicity low-mass brown dwarf. The results of new observations published Mar. 2 in a paper on arXiv.org could help distinguish between these two classes.

CFBDSIR 2149-0403 was detected in 2012 by Delorme and his team as a possible member of the AB Doradus moving group. After its discovery, it was classified by the researchers as a unique T-type isolated planetary-mass candidate. However, due to the lack of convincing evidence supporting the hypothesis that CFBDSIR 2149-0403 formed as a planet and was subsequently ejected, the scientific community does not exclude the possibility that it could be a low-mass brown dwarf.

In order to to fully characterize CFBDSIR 2149-0403 and to constrain its nature, the team has conducted multi-instrument, multi-wavelength follow-up observations of this object. The list of instruments used by Delorme and his colleagues includes the Very Large Telescope's (VLT) X-Shooter spectrograph and HAWK-I near-infrared imager, WIRCam imager at the Canada–France–Hawaii Telescope and NASA's Spitzer Space Telescope.

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