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Replies

Sierra Grant @sierragrant.bsky.social · 15/07/2024

Our latest JWST (+ ALMA, VLTI-GRAVITY, IRTF-iSHELL) paper has been accepted in A&A! arxiv.org/abs/2406.10217 We investigated the short-separation DF Tau binary system. We find an unexpected disk around B with ALMA, with movement seen in ~2 months. The disks are < 3 au in radius.

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Sierra Grant @sierragrant.bsky.social · 15/07/2024

The JWST-MIRI spectrum is extremely line-rich with a forest of H2O lines. DF Tau A and B are not resolved with JWST, therefore the spectrum must be taken as the sum of both disks. We suggest that DF Tau B has a small cavity (~1 au) and that most of the emission is coming from A.

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Sierra Grant @sierragrant.bsky.social · 15/07/2024

However, there is a cold (< 200 K) H2O component with an extended emitting area that is likely coming from both disks. In short: we needed all the data we could get to study this enigmatic system!

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