Brighter Still! A Summary of Photometric Data from the HST Eta Carinae Treasury Project

Details Brighter Still! A Summary of Photometric Data from the HST Eta Carinae Treasury Project Brighter Still! A Summary of Photometric Data from the HST Eta Carinae Treasury Project

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.9305m&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #93.05; Bulletin of the American Astronomical Society, V

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During the past decade Eta Carinae has brightened markedly, indicating a possible change of state. Here we summarize the photometry of just the central star including STIS/CCD and ACS/HRC data gathered for the HST Eta Carinae Treasury project. The current eight-year brightening trend is reminiscent of 1938--1953 when the 5.5 year spectroscopic cycle first appeared. Already the brightness of the central star has begun to overwhelm the bright inner ejecta. Our results indicate that its mass loss rate is probably decreasing. Over the coming decades this should cause the ionization of the Little Homunculus and other envelopes of ejecta, dramatically altering the appearance of Eta Car.

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