Asymmetries and Outflows in the Circumstellar Dust of Mira A

Details Asymmetries and Outflows in the Circumstellar Dust of Mira A Asymmetries and Outflows in the Circumstellar Dust of Mira A

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...670.1347c&link_type=abstract

The Astrophysical Journal, Volume 670, Issue 2, pp. 1347-1352.

Astronomy and Astrophysics

Astronomy

3

Stars: Binaries: Symbiotic, Infrared: Stars, Stars: Individual: Name: Mira Ab, Stars: Late-Type, Techniques: Interferometric

Scientific paper

Asymmetries and motions in the dust shell surrounding Mira A (ο Ceti) are reported. Measurements were taken with the UC Berkeley Infrared Spatial Interferometer (ISI), a three-element interferometer operating at 11.15 μm. At the time of these observations, it was in a linear, east-west configuration with a maximum baseline of 12 m and thus had a resolution of better than 100 mas. Three years of data (2003-2005) are presented and permit observation of the movement of dust shells over time. Fits are made to the visibility and closure-phase curves, which are then used to create one-dimensional profiles of the dust shells. Asymmetries in the circumstellar dust have been observed, and several possible explanations for these asymmetries are explored.

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