exoALMA III: Line-intensity Modeling and System Property Extraction from Protoplanetary Disks
Abstract
The ALMA large program exoALMA offers a unique window into the three-dimensional physical and dynamical properties of 15 circumstellar disks where planets may be actively forming. Here, we present an analysis methodology to map the gas disk structure and substructure encoded in 12CO, 13CO, and CS line emission from our targets. To model and characterize the disk structure probed by optically thin species, such as CS and, in some cases, 13CO, we introduce a composite line profile kernel that accounts for increased intensities caused by the projected overlap between the disk's front and back side emission. Our workflow, built on the Discminer modelling framework, incorporates an improved iterative two-component fitting method for inclined sources (), to mitigate the impact of the disk backside on the extraction of velocity maps. Also, we report best-fit parameters for the Keplerian stellar masses, as well as inclinations, position angles, systemic velocities, rotation direction, and emission surfaces of the disks in our sample.
Keywords
Cite
@article{arxiv.2504.19986,
title = {exoALMA III: Line-intensity Modeling and System Property Extraction from Protoplanetary Disks},
author = {Andrés F. Izquierdo and Jochen Stadler and Maria Galloway-Sprietsma and Myriam Benisty and Christophe Pinte and Jaehan Bae and Richard Teague and Stefano Facchini and Lisa Wölfer and Cristiano Longarini and Pietro Curone and Sean M. Andrews and Marcelo Barraza-Alfaro and Gianni Cataldi and Nicolás Cuello and Ian Czekala and Daniele Fasano and Mario Flock and Misato Fukagawa and Himanshi Garg and Cassandra Hall and Iain Hammond and Thomas Hilder and Jane Huang and John D. Ilee and Andrea Isella and Kazuhiro Kanagawa and Geoffroy Lesur and Giuseppe Lodato and Ryan A. Loomis and Ryuta Orihara and Daniel J. Price and Giovanni Rosotti and Leonardo Testi and Hsi-Wei Yen and Gaylor Wafflard-Fernandez and David J. Wilner and Andrew J. Winter and Tomohiro C. Yoshida and Brianna Zawadzki},
journal= {arXiv preprint arXiv:2504.19986},
year = {2025}
}
Comments
This paper is part of the exoALMA Focus Issue of The Astrophysical Journal Letters