Observing the linked depletion of dust and CO gas at 0.1–10 au in disks of intermediate-mass stars
Affiliation
Univ Arizona, Lunar & Planetary LabIssue Date
2018Keywords
protoplanetary disksstars: pre-main sequence
stars: variables: T Tauri, Herbig Ae/Be
planets and satellites: formation
Metadata
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EDP SCIENCES S ACitation
Observing the linked depletion of dust and CO gas at 0.1–10 au in disks of intermediate-mass stars A. Banzatti, A. Garufi, M. Kama, M. Benisty, S. Brittain, K. M. Pontoppidan and J. Rayner A&A, 609 (2018) L2 DOI: https://doi.org/10.1051/0004-6361/201732034Journal
ASTRONOMY & ASTROPHYSICSRights
© ESO, 2018.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We report on the discovery of correlations between dust and CO gas tracers of the 0.1-10 au region in planet-forming disks around young intermediate-mass stars. The abundance of refractory elements on stellar photospheres decreases as the location of hot CO gas emission recedes to larger disk radii, and as the near-infrared excess emission from hot dust in the inner disk decreases. The linked behavior between these observables demonstrates that the recession of infrared CO emission to larger disk radii traces an inner disk region where dust is being depleted. We also find that Herbig disk cavities have either low (similar to 5-10%) or high (similar to 20-35%) near-infrared excess, a dichotomy that has not been captured by the classic definition of "pre-transitional" disks.Note
Open access journal.ISSN
0004-63611432-0746
Sponsors
ANR of France [ANR16-CE31-0013]; University of Hawaii with National Aeronautics and Space Administration [NNH14CK55B]Additional Links
https://www.aanda.org/10.1051/0004-6361/201732034ae974a485f413a2113503eed53cd6c53
10.1051/0004-6361/201732034