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ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT): I. CO, CS, CN, and H2CO around DG Tau B by Garufi, Antonio; Podio, Linda; Codella, Claudio; Rygl, Kazi; Bacciotti, Francesca; Facchini, Stefano; Fedele, Davide; Miotello, Anna; Teague, Richard; Testi, Leonardo is a scholarly article available to read on EtoBox.

What is ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT): I. CO, CS, CN, and H2CO around DG Tau B about?

The chemical composition of planets is inherited by the distribution of the various molecular species in the protoplanetary disk at thetime of their formation. As of today, only a handful of disks has been imaged in multiple spectral lines with high spatial resolution. As part of a small campaign devoted to the chemical characterization of disk-outflow sources in Taurus, we report on new ALMA Band 6 observations with 20 au resolution toward the embedded young star DG Tau B. Images of the continuum emission reveals a dust disk with rings and, putatively, a leading spiral arm. The disk, as well as the prominent outflow cavities, are detected in CO, H2CO, CS, and CN while they remain undetected in SO2, HDO, and CH3OH. From the absorption of the back-side outflow, we inferred that the disk emission is optically thick in the inner 50 au. This morphology explains why no line emission is detected from this inner region and poses some limitations toward the calculation of the dust mass and the characterization of the inner gaseous disk. The H2CO and CS emission from the inner 200 au is mostly from the disk and their morphology is very similar. The CN emission significantly differs from the

Author

Garufi, Antonio; Podio, Linda; Codella, Claudio; Rygl, Kazi; Bacciotti, Francesca; Facchini, Stefano; Fedele, Davide; Miotello, Anna; Teague, Richard; Testi, Leonardo

Published

2020

Language

EN