University of Virginia, College and Graduate School of Arts and Sciences

UVA Astronomers Find Oasis in Brown Dwarf Desert

April 21, 2016

In a new paper published last month in The Astronomical Journal, a team of astronomers led by Department of Astronomy graduate student Nicholas Troup has shown that the brown dwarf desert is not as barren as previously thought. UVA faculty members Steven Majewski, Michael Skrutskie and John Wilson in the Department of Astronomy collaborated on the findings as part of the Apache Point Observatory Galactic Evolution Experiment, itself part of the Sloan Digital Sky Survey. Astronomers had long expected that the universe would be teeming with brown dwarfs, and plenty have been found in isolation. Until recently, however, so few brown dwarfs have been found orbiting close to other stars that astronomers referred to the phenomenon as the “brown dwarf desert.” This created a problem for theorists, who have been scrambling to explain why astronomers have found so few. So when Sloan Digital Sky Survey astronomers started sifting through their data looking for companions to stars, they never expected such a bountiful harvest. While only 41 close-in brown dwarf companions to stars had been detected previously, in their new work Troup and the Sloan astronomers report the discovery of 112 more.

Read the full article at UVA Today

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