Astrometric Measurements of eta Carinae's Weigelt Blobs C and D and Inferred Dates of Origin

Details Astrometric Measurements of eta Carinae's Weigelt Blobs C and D and Inferred Dates of Origin Astrometric Measurements of eta Carinae's Weigelt Blobs C and D and Inferred Dates of Origin

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.5812d&link_type=abstract

American Astronomical Society Meeting 203, #58.12; Bulletin of the American Astronomical Society, Vol. 36, p.581

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on astrometric measurements of η Carinae's Weigelt blobs C and D (also known as Speckle Objects C and D) derived from WFPC2 observations. The blobs are believed to be compact knots of gas ejected by the star within the last 150 years. We present relative separation measurements between the blobs and the central star for two epochs (blob C) and three epochs (blob D). We also derive proper motion (relative to the central star) results using for 1.7 year (blob C) and 5.9 year (blob D) temporal baselines. Our relative proper motion results imply an ejection date for the blobs that is significantly later than the one currently accepted.

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