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24 July 2014 HD 139614: the interferometric case for a group-Ib pre-transitional young disk
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Abstract
The Herbig Ae star HD 139614 is a group-Ib object, which featureless SED indicates disk flaring and a possible pre-transitional evolutionary stage. We present mid- and near-IR interferometric results collected with MIDI, AMBER and PIONIER with the aim of constraining the spatial structure of the 0.1-10 AU disk region and assess its possible multi-component structure. A two-component disk model composed of an optically thin 2-AU wide inner disk and an outer temperature-gradient disk starting at 5.6 AU reproduces well the observations. This is an additional argument to the idea that group-I HAeBe inner disks could be already in the disk-clearing transient stage. HD 139614 will become a prime target for mid-IR interferometric imaging with the second-generation instrument MATISSE of the VLTI.
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Lucas Labadie, Alexis Matter, Alexander Kreplin, Bruno Lopez, Sebastian Wolf, Gerd Weigelt, Steve Ertel, Jean-Philippe Berger, Jorg-Uwe Pott, and William C. Danchi "HD 139614: the interferometric case for a group-Ib pre-transitional young disk", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 91462T (24 July 2014); https://doi.org/10.1117/12.2055353
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