On Wed, 9 Jan 2019 13:26:49 -0500, JBI wrote:

By the way, I wonder what's going on with R Doradus with its "spiked"
appearance. I wonder if it's the nature of the IR band causing it, or
maybe that's how it really appears? Strange.

It's simply an artifact of the mathematical process used to
reconstruct a spatial image from the raw interferometric data.