NICMOS Study of Nova Shells

Details NICMOS Study of Nova Shells NICMOS Study of Nova Shells

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7831k&link_type=abstract

HST Proposal ID #7831

Physics

Hst Proposal Id #7831 Cool Stars Low-Mass Stars

Scientific paper

We propose to obtain multi-wavelength infrared images of the old nova shells of QU Vul, QV Vul, V1974 Cyg, and V723 Cas. The angular expansion rates and spatial distribution of the ejecta in both the continuum and emission lines of ionized gas will be determined. The objectives of our observations are to utilize HST's unique angular resolution and wavelength coverage to compare current observations of the shell of these unique novae with the angular expansion rates predicted from radio, optical, and infrared measurements made in the early phases of their eruption, and to determine the ionization and density structure of the clumpy ejecta. From the flux of the free-free continuum emission shell masses will be derived. The proposed HST NICMOS observations offer the unique possibility to significantly improve our knowledge of basic physical parameters such as luminosity and shell mass and the structure of nova shells.

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