| Title: |
Constraints on the Gas-phase C/O Ratio of DR Tau's Outer Disk from CS, SO, and C 2 H Observations |
| Authors: |
Huang, Jane; Bergin, Edwin A.; Le Gal, Romane; Andrews, Sean M.; Bae, Jaehan; Keyte, Luke; Sturm, J. A. |
| Contributors: |
Institut de Planétologie et d'Astrophysique de Grenoble (IPAG); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG)-Université Grenoble Alpes (UGA) |
| Source: |
ISSN: 0004-637X. |
| Publisher Information: |
CCSD; American Astronomical Society |
| Publication Year: |
2024 |
| Collection: |
Université Grenoble Alpes: HAL |
| Subject Terms: |
Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Millimeter astronomy; Astrochemistry; Planet formation; Protoplanetary disks; [SDU]Sciences of the Universe [physics] |
| Description: |
International audience ; Millimeter wavelength observations of Class II protoplanetary disks often display strong emission from hydrocarbons and high CS/SO values, providing evidence that the gas-phase C/O ratio commonly exceeds 1 in their outer regions. We present new NOEMA observations of CS 5–4, SO 7 6 –6 5 and 5 6 –4 5 , C 2 H N = 3–2, HCN 3–2, HCO + 3–2, and H 13 CO + 3–2 in the DR Tau protoplanetary disk at a resolution of ∼0.″4 (80 au). Estimates for the disk-averaged CS/SO ratio range from ∼0.4 to 0.5, the lowest value reported thus far for a T Tauri disk. At a projected separation of ∼180 au northeast of the star, the SO moment maps exhibit a clump that has no counterpart in the other lines, and the CS/SO value decreases to |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2407.01679; ARXIV: 2407.01679; BIBCODE: 2024ApJ.973.135H |
| DOI: |
10.3847/1538-4357/ad6447 |
| Availability: |
https://insu.hal.science/insu-04836803; https://insu.hal.science/insu-04836803v1/document; https://insu.hal.science/insu-04836803v1/file/Huang_2024_ApJ_973_135.pdf; https://doi.org/10.3847/1538-4357/ad6447 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.203DB927 |
| Database: |
BASE |