A Cavity of Large Grains in the Disk Around the Group II Herbig Ae/Be Star HD 142666
作者： A. E. Rubinstein , E. Macías , C. C. Espaillat , K. Zhang , N. Calvet
关键词:
摘要: Herbig Ae/Be (HAeBe) stars have been classified into Group I or II, which were initially thought to be flared and flat disks, respectively. Several sources shown large gaps, suggesting ongoing planet formation, while no gaps found in the disks of II sources. We analyzed disk around source, HD 142666, using irradiated accretion modeling broad-band spectral energy distribution along with 1.3 millimeter spatial brightness traced by Atacama Large Millimeter Submillimeter Array (ALMA) observations. Our model reproduces available data, predicting a high degree dust settling disk, is consistent classification 142666. In addition, observed visibilities synthesized image could only reproduced when including depletion grains out ~16 au our model, although ALMA observations did not enough angular resolution fully resolve inner parts disk. These results may suggest that some HAeBe cavities as well. Further are needed discern how commonly occur this class objects, well reveal their possible origins.
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