Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21734019g&link_type=abstract
American Astronomical Society, AAS Meeting #217, #340.19; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
High contrast and high angular resolution imagery has opened new viewpoints on the formation and early evolution of planetary systems, revealing features of protoplanetary and young planetary systems which would go undetected in the integrated measures of the systems. Much of the power of such studies has resulted from pan-chromatic data, but the majority of studies to date have been limited to optical and longer wavelengths, despite the wealth of atomic, ionic, and molecular tracers of circumstellar material in the FUV. As with high-contrast imaging at longer wavelengths, realizing the full potential of FUV imagery of young stars requires subtraction of PSF template data, which are now available for 3 of the HST ACS/SBC bandpasses. Such imagery has resulted in the first imagery of the circumstellar disk around the Herbig Ae star PDS 144S and can trace the geometry of the molecular gas disk for T Tauri stars. FUV imaging data also provide exquisite detail for molecular outflows for systems like T Tauri, complementing studies in the FIR with Herschel. Such data can also reveal the presence of previously unsuspected disk winds, as seen in GM Aur. Since FUV imagery is sensitive to extinction, FUV data preferentially detect circumstellar material on the near side of disks and the approaching components of outflows, removing ambiguities in disk viewing geometry, and can map, at the highest angular resolution achievable with HST, where disks are shadowed. This is a capability which future UV/Optical telescopes optimized for studies of planetary system formation should not be without.
This study is based on data obtained with the Hubble Space Telescope under GO programs 10864, 11336, and 12016.
Apai Daniel
Ayres Tom
Brittain Sean
Brown Adrian
Brown Jacqueline
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