Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...540..422p&link_type=abstract
The Astrophysical Journal, Volume 540, Issue 1, pp. 422-428.
Astronomy and Astrophysics
Astronomy
13
Stars: Circumstellar Matter, Ism: Dust, Extinction, Infrared: Stars, Stars: Individual: Constellation Name: Uy Aurigae, Stars: Pre-Main-Sequence, Techniques: Polarimetric
Scientific paper
We have obtained J-band (1.2 μm) polarimetry observations of the circumbinary disk around UY Aurigae. These observations were made possible by the use of the University of Hawaii 36 element adaptive optics instrument, Hokupa'a, at the 3.35 m CFHT. The deep (120 minute), high-resolution (0.15") polarization images reveal a centrosymmetric polarization signature from the light scattered off the circumbinary dust disk which is ~106 times fainter than the stars in the binary system. A comparison with a Mie scattering model of the circumbinary disk in UY Aurigae suggests that the polarization signature is dominated by the smallest grains in the disk (~0.03 μm) and further supports the hypothesis that the resolved light seen in the optical and infrared originates from a large flattened disk of dust surrounding both stars.
Close Laird M.
Graves Elon J.
Northcott Malcolm
Potter Daniel E.
Roddier Claude
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