Abstract
We have observed the nearest known brown dwarfs, the binary system ∈ Indi Bab (d = 3.626 pc), for 8.6- and 4.8-GHz radio emission with the Australia Telescope Compact Array. If either brown dwarf emits radio flares, then they are respectively at least 5.5 and 1.2 times weaker than LP 944-20, the nearest brown dwarf with detected radio emission. We associate the ROSAT source 1 WGA J2203.9 - 5647 with ∈ Indi Bab since the separation was about 30 arcsec at the time of the ROSAT observation. Assuming the association, then ∈ Indi Bab has an L 0.4-2.4keV X-ray luminosity of 5.6 x 10 25 erg s -1 which makes it roughly a factor of 2 less luminous than LP 944-20. The radio non-detections imply that ∈ Indi Bab does not violate, or at least does not violate as strongly as LP 944-20, the Gudel-Benz relationship of X-ray and radio emission.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
