English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Herbig Ae/Be (HAeBe) stars have been classified into Group I or Group II,which were initially thought to be flared and flat disks, respectively. SeveralGroup I sources have been shown to have large gaps, suggesting ongoing planetformation, while no large gaps have been found in the disks of Group IIsources. We analyzed the disk around the Group II source, HD 142666, usingirradiated accretion disk modeling of the broad-band spectral energydistribution along with the 1.3 millimeter spatial brightness distributiontraced by Atacama Large Millimeter and Submillimeter Array (ALMA) observations.Our model reproduces the available data, predicting a high degree of dustsettling in the disk, which is consistent with the Group II classification ofHD 142666. In addition, the observed visibilities and synthesized image couldonly be reproduced when including a depletion of large grains out to ~16 au inour disk model, although the ALMA observations did not have enough angularresolution to fully resolve the inner parts of the disk. These results maysuggest that some disks around Group II HAeBe stars have cavities of largegrains as well. Further ALMA observations of Group II sources are needed todiscern how commonly cavities occur in this class of objects, as well as toreveal their possible origins.

A Cavity of Large Grains in the Disk Around the Group II Herbig Ae/Be Star HD 142666