The TRUE three-dimensional structure of the Eta Carinae nebula

Details The TRUE three-dimensional structure of the Eta Carinae nebula The TRUE three-dimensional structure of the Eta Carinae nebula

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7323p&link_type=abstract

HST Proposal ID #7323

Physics

Hst Proposal Id #7323 Stellar Ejecta

Scientific paper

We propose to use NICMOS and WFPC2 to trace independently the spatial distribution of the dust, of the ionized gas and of the neutral material in Eta Carinae nebula. The radiation we receive from the Homunculus is due to reflection of light from the central star and intrinsic emission from the ionized gas. , Only combining optical and IR imaging in selected lines, and the diffraction limited imaging offered by HST, it will be possible, for the first time, to disentangle geometry and optical depth effects. It is important to note that very important results can be achieved immediately from the direct inspection of the proposed images. For example, since the dust obscuration at BGamma is rather small and scattered light is quite negligible, the NICMOS image will provide a direct view of the projected distribution of the gas. As a subsequent step, we will model dust absorption and scattering, by applying the method outlined by Natta and Panagia {1984} to which we have added the foreground and internal absorption by dust and the effects of scattering of nebular and stellar radiation. This analysis will produce a true 3-dimensional map of the gas and dust distribution in the Eta Carinae nebula. This result will gain us fundamental insight in the nebular formation process and will further constrain the interacting wind models which are using this unique nebula as their benchmark.

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