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Correlation between grain growth and disk geometry in Herbig Ae/Be systems

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arxiv astro-ph/0404553 v1 pith:6ESKYGUZ submitted 2004-04-28 astro-ph

B. Acke , M.E. van den Ancker , C.P. Dullemond , R. van Boekel , L.B.F.M. Waters This is my paper · ORCID
classification astro-ph
keywords correlationdiskflaredgeometryherbigself-shadoweddisksdistribution
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We have calculated the (sub-)mm spectral indices of 26 Herbig Ae/Be stars, for which we can determine the infrared spectral energy distribution (SED). We find a clear correlation between the strength of the ratio of the near- to mid-infrared excess of these sources, and the slope of the (sub-)mm energy distribution. Based on earlier multi-dimensional modeling of disks around Herbig Ae stars, we interpret this as a correlation between the geometry of the disk (flared or self-shadowed) and the size of the grains: self-shadowed disks have, on average, larger grains than their flared counterparts. These data suggest that the geometry of a young stellar disk evolves from flared to self-shadowed.

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  1. SMA 200-400 GHz Survey for 10 faint Class II Disks in the Taurus Molecular Cloud

    astro-ph.EP 2026-08 conditional novelty 6.0 of 10

    Faint Class II disks in Taurus show the same 198-358 GHz spectral index distribution as brighter disks, suggesting they too are optically thick at submillimeter wavelengths.

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