Mathematics – Logic
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20912701w&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #127.01; Bulletin of the American Astronomical Society,
Mathematics
Logic
Scientific paper
We present Hubble Space Telescope Advanced Camera for Surveys (HST/ACS) coronagraphic observations of the Herbig Ae star HD 163296. HD 163296's scattered light disk was resolved in the F606W and F814W filters in observations obtained in 2003 and in the F435W filter in observations obtained in 2004. The color of the disk, as determined by analysis of azimuthally averaged surface brightness profiles of the 2003 data, generally matches the observed color of HD 163296. While the 2003 epoch data do not exhibit any clear evidence of radial or azimuthal asymmetries, a distinct spiral arm structure is present in the 2004 (F435W) data. This spiral structure is spatially coincident with one of the two ansae reported in STIS white-light coronagraphic imaging of HD 163296 (Grady et al. 2000). We discuss the possible origin of the observed morphological differences in our multi-epoch dataset in context with previous efforts to spatially resolve the disk (Grady et al. 2000, 2005).
Ardila David
Clampin Marc
Ford Holland
Golimowski Dave
Grady Carol
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