Imaging Final Flash Objects in the Near-IR

Details Imaging Final Flash Objects in the Near-IR Imaging Final Flash Objects in the Near-IR

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725601h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #256.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

A post-AGB helium shell burning episode is a brief yet common evolutionary process for low mass stars. The final helium shell flash occurs after the star has ejected a planetary nebula and has started on the white dwarf track. Due to the brief 104 yr duration of this event very few final flash objects are known. We present Ks band and He I 10830 A AO images for four of these objects. The images were obtained with both NIRI/Altair at Gemini and WHIRC/WTTM at WIYN and have spatial resolutions as high as 0.11 arcseconds. These results provide a good comparative test of the capabilities offered by these two instruments. The images show the cloud of ejecta produced by the final flash. We discuss the age of the ejecta in the context of a unifying model.

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