STIS Coronagraphic Imaging of the Kuiper Belt Surrounding the HR 8799 Planetary System.

Details STIS Coronagraphic Imaging of the Kuiper Belt Surrounding the HR 8799 Planetary System. STIS Coronagraphic Imaging of the Kuiper Belt Surrounding the HR 8799 Planetary System.

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12281c&link_type=abstract

HST Proposal ID #12281. Cycle 18

Astronomy and Astrophysics

Astronomy

Scientific paper

The recent imaging detection of exoplanets in wide orbits around Fomalhaut and HR8799 represents the start of a new era in the study of exoplanets. Both planet detections are associated with the presence of a debris disk. Spitzer tells us that HR 8799's debris disk has a warm inner component inside the orbit of HR 8799d, a cooler outer component with a sharp inner edge just beyond the orbit of HR 8799b, and an extended halo of small particles. The disk around HR 8799 has not been imaged in scattered light and is a prime candidate for imaging with the STIS coronagraph. Obtaining a resolved, scattered light image is a key observation, since it would allow: 1} the position angle and inclination of the HR 8799 exoplanetary system to be determined, thus providing the astrometric information required to refine the planetary orbits and constrain their masses; 2} an independent upper limit on the mass of HR 8799b, via its interaction with the outer dust disk, providing a constraint on planetary structure models; 3} constraints on the dust's physical properties and origin; 4} determination of the architecture of HR 8799's exoplanetary system; and 5} limits to be set on the optical photometry for two of the planets.;

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