Submillimetre Emission from Eta Carinae

Details Submillimetre Emission from Eta Carinae Submillimetre Emission from Eta Carinae

2006-08-16

arxiv.org/abs/astro-ph/0608333v2

Mon.Not.Roy.Astron.Soc.372:1133-1139,2006

Astronomy and Astrophysics

Astrophysics

7 pages, 5 figures, accepted MNRAS, corrected typos

Scientific paper

10.1111/j.1365-2966.2006.10921.x

We present critical, long-wavelength observations of Eta Carinae in the submillimetre using SCUBA on the JCMT at 850 and 450 um to confirm the presence of a large mass of warm dust around the central star. We fit a two-component blackbody to the IR-submm spectral energy distribution and estimate between 0.3-0.7 solar masses of dust exists in the nebula depending on the dust absorption properties and the extent of contamination from free-free emission at the SCUBA wavelengths. These results provide further evidence that Eta Carinae's circumstellar nebula contains > 10 solar masses of gas, although this may have been ejected on a longer timescale than previously thought.

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