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The Little Homunculus of Eta Carinae: Ejection Date, Gas Temperature and Reddening ValuesHST/STIS spectral monitoring of Eta Carinae and its ejecta reveals the presence of a relatively small bipolar structure inside the central regions of the familiar Homunculus lobes. Astrometric analysis shows that the Little Homunculus was most likely ejected during the 1890 event. Here we employ a simple plasma analysis on the ejecta: (1) identify the forbidden [Fe II] lines, and (2) use them with a Boltzmann distribution to estimate a locus in "gas temperature" -versus- "Reddening" parameter space. Our preliminary result shows that gas temperature of the Little Homunculus may be around 5000 K with reddening E(B-V) approx. = 0.5 of a standard interstellar reddening is valid.
Document ID
20020016398
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Ishibashi, K.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Davidson, K.
(Minnesota Univ. MN United States)
Gull, T. R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Fisher, Richard R.
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Astrophysics
Meeting Information
Meeting: AAS 199th Conference
Location: Washington, DC
Country: United States
Start Date: January 6, 2002
End Date: January 10, 2002
Sponsors: American Astronomical Society
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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