Following Eta Carinae's Change of State

Details Following Eta Carinae's Change of State Following Eta Carinae's Change of State

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop10844d&link_type=abstract

HST Proposal ID #10844. Cycle 15

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Scientific paper

Eta Carinae is now known to be undergoing some unusually rapid changes on a timescale of several years. They are probably essential for modeling the star's long-term recovery from its Giant Eruption 160 years ago -- the prototype "supernova impostor" event. Since high spatial resolution is needed to isolate the central star, and the present state will probably not recur in the future, it is important to obtain HST data during the next two years. We propose a cost-effective set of ACS observations with three goals: 1 to obtain a continuing record of the star's rapid UV and visual brightening; 2 to lengthen the temporal baseline of ACS images enough to settle an important question concerning ejecta ages; and 3 to extend the record of morphological changes in the inner ejecta past the midpoint of eta Car's 5.5-year cycle.

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