Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5482s&link_type=abstract
HST Proposal ID #5482
Physics
Hst Proposal Id #5482 Interstellar Medium Novae
Scientific paper
The recurrent nova T Pyxidis displays at least three concentric shells from its most recent eruptions (1920, 1944, and 1966). It is one of only a dozen novae with known shells, and the only recurrent nova with clearly resolved circumstellar matter. A unique and once-only opportunity will exist during T Pyxidis' next eruption (now overdue) to determine 1) The uniformity and isotropy of material (both dust and different chemical elements) ejected in previous eruptions, and 2) The smallest structures formed in nova eruptions. The Planetary Camera will be used to obtain narrowband Hydrogen, Helium, Nitrogen and Oxygen images, as well as broadband images. These will be used to search for fluorescence and reflection light echoes from, and small-scale structure in the nova circumstellar gas and dust ejecta. We note that this proposal was granted HST time during cycle 1. The time was rescinded after the spherical aberration problem was discovered. The refurbished HST and WFPCII will be able to carry out all the scientific goals of the original proposal.
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