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High resolution coronographic imaging of AG Carinae1

Published online by Cambridge University Press:  12 April 2016

Antonella Nota  and
Francesco Paresce
Antonella Nota
Affiliation:
Space Telescope Science Institute, 3700 S.Martin Drive, Baltimore, MD 21218
Francesco Paresce
Affiliation:
Space Telescope Science Institute, 3700 S.Martin Drive, Baltimore, MD 21218

Abstract

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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 > 1μ.

Type
Section I: Main Papers, General Discussions, and Two Panel Discussions
Information
International Astronomical Union Colloquium , Volume 113: Physics of Luminous Blue Variables , 1989 , pp. 159 - 164
Copyright
Copyright © Kluwer 1989

Footnotes

2

On leave from the Observatory of Padova, Italy.

3

Affiliated to the Astrophysics Division, Space Science Department, ESA

1

Based on data collected at the European Southern Observatory, La Silla, Chile.

References

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