The Morphology of the Post-Red Supergiant IRC+10420's Circumstellar Ejecta

Details The Morphology of the Post-Red Supergiant IRC+10420's Circumstellar Ejecta The Morphology of the Post-Red Supergiant IRC+10420's Circumstellar Ejecta

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21442802t&link_type=abstract

American Astronomical Society, AAS Meeting #214, #428.02; Bulletin of the American Astronomical Society, Vol. 41, p.698

Astronomy and Astrophysics

Astronomy

Scientific paper

The extremely luminous post-red supergiant and powerful OH/IR source IRC +10420 is surrounded by a complex circumstellar nebula. Numerous small condensations, arcs, jet-like rays of knots, and intriguing semi-circular structures are easily visible in HST/WFPC2 images. These spatially recognizable features are evidence for episodic mass loss events possibly from localized active regions on the star's surface. We have obtained second epoch images with an 11 year baseline to measure the transverse motions of structures in the ejecta. We report the preliminary results of our measurements and the evidence for a complex mass loss history over several hundred years.

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