The Size Scales of Line-Emitting Regions in the Cloverleaf QSO

Details The Size Scales of Line-Emitting Regions in the Cloverleaf QSO The Size Scales of Line-Emitting Regions in the Cloverleaf QSO

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9439t&link_type=abstract

HST Proposal ID #9439

Physics

Hst Proposal Id #9439

Scientific paper

The Cloverleaf QSO is a four-component gravitationally-lensed broad absorption line {BAL} QSO. Models of the Cloverleaf lens indicate that, if a sufficiently extended emitting region surrounds the central source, an Einstein ring or partial ring will be seen in emission. However, the compact continuum should appear as four unresolved components, as is verified in existing broad-band images. These predictions are very robust. We propose here to determine or place limits on the size-scale of several of the emitting regions in the Cloverleaf using this effect. This will be done using the ACS-WFC RAMP filters to take images in LyAlpha, NV, and the nearby continuum. Narrow-band observations with NICMOS will image OIII and the nearby continuum. An observation of each of these emitting regions will allow us to explore a different aspect of the QSO's physical environment. Regardless of the findings, these results will improve our understanding of the size-scales of the line-emitting regions in BAL QSOs and in QSOs in general.

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