High Resolution Coronographic Imaging of AG Carinae
We 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 > 1/μ.
KeywordsNarrow Band Image Central Star Companion Star High Resolution Observation Narrow Versus
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