Open AccessGas Evolution in Inner Disk Cavities from a Synergic Analysis of IR-CO and UV-H2 Spectra
Author(s) -
M. A. Sánchez,
Andrea Banzatti,
Keri Hoadley,
S. Bruderer
Publication year - 2021
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/abf43c
Subject(s) - spectral line , emission spectrum , ultraviolet , protoplanetary disk , analytical chemistry (journal) , infrared , excitation , wavelength , astrophysics , planet , materials science , physics , chemistry , optics , astronomy , chromatography , quantum mechanics
We are conducting a multi-wavelength analysis of high-resolution molecular spectra that probe the evolution of gas in the inner 10 au in protoplanetary disks. A sample of 15 disks has been combined to probe a range of inner disk structures including small and large dust cavities. Half of the sample has been observed in far-ultraviolet H 2 emission with a new HST-COS program (GO-14703), that we have combined to near-infrared spectra of CO emission as observed with VLT-CRIRES and IRTF-iSHELL. This synergic dataset traces the evolution and depletion of CO and H 2 in inner disk cavities and shows an evolving radial stratification of the molecular gas, where CO lines are narrower than H 2 lines in disks with cavities. CO rotation diagrams also show significant evolution, suggesting a change in gas excitation as CO emission recedes to larger disk radii.