Observing the linked depletion of dust and CO gas at 0.1–10 au in disks of intermediate-mass stars
AffiliationUniv Arizona, Lunar & Planetary Lab
stars: pre-main sequence
stars: variables: T Tauri, Herbig Ae/Be
planets and satellites: formation
MetadataShow full item record
PublisherEDP SCIENCES S A
CitationObserving 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/10.1051/0004-6361/201732034
JournalASTRONOMY & ASTROPHYSICS
Rights© ESO, 2018.
Collection InformationThis 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 firstname.lastname@example.org.
AbstractWe 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.
NoteOpen access journal.
SponsorsANR of France [ANR16-CE31-0013]; University of Hawaii with National Aeronautics and Space Administration [NNH14CK55B]