High-Resolution Millimeter Images of the Eta Carinae System

Details High-Resolution Millimeter Images of the Eta Carinae System High-Resolution Millimeter Images of the Eta Carinae System

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atnf.prop..235w&link_type=abstract

ATNF proposal C1167, Semester: April, 2006

Astronomy and Astrophysics

Astronomy

Stellar, Atca

Scientific paper

This is a proposal to continue high-resolution millimeter imaging of eta Carinae. In 2003 we carried out pioneering observations of eta Car at millimeter wavelengths on either side of periastron that proved that the remarkable recombination line maser in the system is not located in the wind of either the luminous blue variable primary or its unseen hot companion, adding to the mystery of this feature. 12 mm images with a resolution of 0.2 arcsec continue to reveal previously unseen structures. The radio emission comes from gas clouds optically thick to thermal bremsstrahlung, and they are optically thick at different depths at 12 and 3 mm, emphasizing different aspects of the gas distribution. In 2005 we successfully carried out some of the first 3 mm observations in the southern hemisphere with 3 km baselines, thanks to the extraordinary flux level of this totemic southern source, and we request time to watch the spatial distribution of ionized gas evolve as the system approaches apastron.

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