Abstract
AbstractWe present the first high resolution observations of the ring nebula around the galactic LBV AG Car obtained through broad band B, V, R, I filters with the STScI coronograph on the ESO 2.2 m. telescope. Highly anisotropic continuum emission in all these bands is clearly detected, in the shape of a bipolar structure elongated along the NE-SW direction extending from a few arcsecs from the star out to ⋍ 15 arcsecs corresponding to a projected linear distance of ⋍ 0.5 parsecs, with a surface brightness in the range 17.9-19.4 mag/arcsec2. Its essentially neutral color with respect to the star Δ(V-I) = −0.07) suggests that the observed radiation is starlight scattered by dust grains of diameter > 1μ.
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