Infrared studies of Eta Carinae. I - Spectroscopy and a composite dust model

Details Infrared studies of Eta Carinae. I - Spectroscopy and a composite dust model Infrared studies of Eta Carinae. I - Spectroscopy and a composite dust model

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.227..535r&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 227, July 15, 1987, p. 535-542.

Astronomy and Astrophysics

Astronomy

23

Cosmic Dust, Grain Size, Infrared Spectra, Stellar Models, Stellar Spectrophotometry, Variable Stars, Spectrum Analysis, Stellar Temperature

Scientific paper

The authors report spectral observations of η Carinae between 8 and 13 μm which compare the central peak of the homunculus with its periphery. The spectra not only show a lower effective temperature for the outer regions but also that the grains here have a different emissivity function. This has been shown to be consistent with the presence of large grains (Mitchell & Robinson, 1986) and here the modelling is extended to that of a spherical core containing small grains (a ≅ 0.2 μm) and a disc of larger grains (a ≅ 2.0 μm); the model predictions are consistent with observations.

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