In a first, JWST finds isolated brown dwarf with methane, auroras

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A team of scientists was “confused” by James Webb’s initial observations of the isolated brown dwarf W1935. After James Webb’s initial observations of brown dwarf W1935, scientists were left feeling “confused”.

For the first time, a team of astronomers has discovered methane emissions coming from a distant brown dwarf.

The brown dwarf, W1935, is located 47 light years from Earth. It was co-discovered by Backyard Worlds: Planet 9 citizen science volunteer Dan Caselden and the NASA CatWISE team.with a surface temperature of approximately 400° Fahrenheit. The researchers couldn’t determine its mass with a great deal of accuracy, though it is likely 6-35 times the mass of Jupiter.

“We were pleasantly shocked when the model clearly predicted a temperature inversion,” explained co-author Ben Burningham from the University of Hertfordshire. “But we also had to figure out where that extra upper atmosphere heat was coming from.”

 

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