Eta Carinae - A new model

Details Eta Carinae - A new model Eta Carinae - A new model

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..230b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 1, p. 230-238.

Astronomy and Astrophysics

Astrophysics

6

Cosmic Rays, Stellar Envelopes, Stellar Models, Stellar Spectrophotometry, Cosmic Dust, Gamma Rays, Infrared Spectra

Scientific paper

Eta Car is surrounded by a thick shell of dust whose infrared emission is close to 5 x 10 exp 6 solar luminosities. We propose a new model for Eta Car in which cosmic rays originate in a central object and stream out, losing energy in the gas and dust. This energy is subsequently radiated by the dust grains, with most of the energy coming from cosmic-ray protons having kinetic energies from 1 MeV to 10 MeV. Assuming for the cosmic-ray protons a differential kinetic energy spectrum of the form E exp -2.5, the infrared spectrum can be very well fitted for wavelengths between 5 and 175 micron. The visual continuum exhibits features that strongly suggest the synchrotron mechanism. Tests of the model are provided through predicted fluxes of high- and low-energy gamma rays that will be produced through proton collisions in the gas and dust of the nebula.

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