Recent Changes in the Near-Infrared Structure of η Carinae

Details Recent Changes in the Near-Infrared Structure of η Carinae Recent Changes in the Near-Infrared Structure of η Carinae

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...529l..99s&link_type=abstract

The Astrophysical Journal, Volume 529, Issue 2, pp. L99-L102.

Astronomy and Astrophysics

Astronomy

27

Stars: Circumstellar Matter, Stars: Individual: Constellation Name: &Eta, Carinae

Scientific paper

Near-infrared imaging at two phases in the 5 yr spectroscopic cycle of η Carinae reveals changes in the spatial structure of the inner core that may be related to recently reported near-infrared photometric variability. The central source changed from a pointlike object to a more extended, bipolar or shell structure. This behavior is reminiscent of changes observed in the radio continuum. NICMOS images show a toroidal distribution of dust and gas around the central star and confirm the morphology of several other structures observed in ground-based images of the Homunculus. The morphological variations appear to be confined to the central core of the nebula.

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