SIMBA's view of the epsilon Eri disk

Details SIMBA's view of the epsilon Eri disk SIMBA's view of the epsilon Eri disk

2004-01-09

arxiv.org/abs/astro-ph/0401139v1

Astron.Astrophys. 414 (2004) L9-L12

Astronomy and Astrophysics

Astrophysics

To appear in A&A Letters, in press

Scientific paper

10.1051/0004-6361:20031722

We present the first observational confirmation for an extended circumstellar dust disk around epsilon Eri. The observations were obtained with the bolometer array SIMBA at the 15 m radio telescope SEST in Chile and measure the dust continuum at 1.2 mm. The emission, with a total flux of 21.4 mJy and a rms of 2.2 mJy/beam, is resolved to a deconvolved size of 27.4 arcsec which corresponds to 88 AU. No clear indication for a ring-like disk structure is seen, possibly also due to the telescope's large beam width of 24 arcsec. Models of the object's spectral energy distribution from IR to mm-wavelengths show that the emission can also be explained by a simple disk model. We further demonstrate the strong influence of noise and propose to be cautious with interpretations of the ring substructure.

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