Probing the Activity of a Pre-transitional Disk and Its Central Star:variability in the Gas and Dust Emission of the Herbig Fe Star SAO 206462 (hd 135344b)

Details Probing the Activity of a Pre-transitional Disk and Its Central Star:variability in the Gas and Dust Emission of the Herbig Fe Star SAO 206462 (hd 135344b) Probing the Activity of a Pre-transitional Disk and Its Central Star:variability in the Gas and Dust Emission of the Herbig Fe Star SAO 206462 (hd 135344b)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542802s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #428.02; Bulletin of the American Astronomical Society, Vol. 42, p.345

Astronomy and Astrophysics

Astronomy

Scientific paper

SAO 206462 is a pre-transitional disk system with a cold outer torus and a small hot inner ring of gas and dust, separated by a gap that may be the result of planet formation. Recent spectrophotometric observations between 0.8 and 5 microns indicated significant (30%) changes in brightness on time scales of a month. In 2009 we observed SAO 206462 monthly between February and July. During this time the continuum rose and fell by 25%, while many of the emission lines underwent a factor to 2 increase. With the exception of a brief 15% drop in brightness at visible wavelengths, the star was photometrically stable to within 10%. This suggests that both the gas and dust were responding to changes in the UV through X-ray emission from the star.
This study was funded by HST-GO-10764, HST-GO-10864, NASA ADP NNH06CC28C and NNX09AC73G.

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