exoALMA: a search for the youngest exoplanets
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Peak intensity of CO emission from the fifteen sources surveyed by exoALMA.
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Project Overview
exoALMA is conducting a comprehensive planet hunting campaign in the sub-mm regime — the first to focus on still-forming planets. By leveraging the unparalleled spatial and spectral resolution of ALMA, the exoALMA program searches for still-forming planets embedded in their parental protoplanetary disks through their influence on the dynamics of the surrounding gas.
exoALMA focuses on 15 sources, studying some of the deepest and most sensitive images of these planet-forming nurseries taken to date. These observations are transforming our understanding of how planetary systems form and provide constraints on the mass distribution within these systems, mechanisms that concentrate grains into rings, and the 3D velocity structures of disks.
The exoALMA project is further described at https://www.exoalma.com/, including pages for Data, Publications, and Software.
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Project Summary Table
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| Project code | Title | PIs |
|---|---|---|
| 2021.1.01123.L | exoALMA: a search for the youngest exoplanets | Richard Teague (PI); Myriam Benisty, Stefano Facchini, Misato Fukagawa, Christophe Pinte (co-PIs) |
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Deliveries
The delivered data products are:
- Calibration and imaging scripts
- Fiducial line images
- Measurement Sets (currently stored at NRAO while transfer to Dataverse for a DOI is completed)
- High angular resolution line images
- Continuum images
- High surface brightness sensitivity line images
All exoALMA data products are made public through the exoALMA Dataverse. If you want the raw data, use the ALMA Archive and search for project ID 2021.1.01123.L. When using any of the data, please ensure to reference exoALMA I and exoALMA II. For direct links to commonly used products and paper-specific sub-repositories, see: https://www.exoalma.com/data.
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PIs
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| Name | Affiliation | Country |
| Richard Teague (PI) | Massachusetts Institute of Technology | US |
| Myriam Benisty (co-PI) | Max Planck Institute for Astronomy | Germany |
| Stefano Facchini (co-PI) | University of Milan | Italy |
| Misato Fukagawa (co-PI) | National Astronomical Observatory of Japan | Japan |
| Christophe Pinte (co-PI) | Univ. Grenoble Alpes | France |
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Co-Is
Full consortium list (also maintained at https://www.exoalma.com/team):
| Name | Affiliation | Country |
| Sean Andrews | CfA Harvard | US |
| Jaehan Bae | University of Florida | US |
| Marcelo Barraza | Massachusetts Institute of Technology | US |
| Gianni Cataldi | National Astronomical Observatory of Japan | Japan |
|
Valentin Christiaens |
Instituut voor Sterrenkunde | Belgium |
|
Nicolás Cuello |
Univ. Grenoble Alpes | France |
|
Pietro Curone |
Universidad de Chile | Chile |
|
Ian Czekala |
Penn State | US |
|
Gaspard Duchene |
UC Berkeley | US |
|
Daniele Fasano |
Max Planck Institute for Astronomy | Germany |
|
Mario Flock |
Max Planck Institute for Astronomy | Germany |
|
Maria Galloway-Sprietsma |
University of Florida | US |
|
Charlie Gardner |
Rice University | US |
|
Himanshi Garg |
Monash University | Australia |
|
Cassandra Hall |
The University of Georgia |
US |
|
Iain Hammond |
Monash University |
Australia |
|
Caitlyn Hardiman |
Monash University | Australia |
|
Jun Hashimoto |
ASIAA National Taiwan University | Taiwan |
|
Tom Hilder |
Monash University |
Australia |
|
Jane Huang |
Columbia University |
US |
|
Kazuhiro Kanagawa |
Ibaraki University |
Japan |
|
John Ilee |
University of Leeds | UK |
|
Andrea Isella |
Rice University | US |
|
Andrés Izquierdo |
Leiden University | The Netherlands |
|
Geoffroy Lesur |
Univ. Grenoble Alpes | France |
|
Giuseppe Lodato |
University of Milan | Italy |
|
Cristiano Longarini |
University of Milan | Italy |
|
Ryan Loomis |
NRAO | US |
|
Francois Menard |
Univ. Grenoble Alpes | France |
|
Munetake Momose |
Ibaraki University | Japan |
|
Ryuta Orihara |
Ibaraki University | Japan |
|
Daniel Price |
Monash University |
Australia |
|
Giovanni Rosotti |
University of Milan | Italy |
|
Jochen Stadler |
Univ. Grenoble Alpes | France |
|
Jason Terry |
University of Oxford | UK |
|
Leonardo Testi |
University of Bologna | Italy |
|
Leon Trapman |
University of Wisconsin at Madison | US |
|
Takashi Tsukagoshi |
National Astronomical Observatory of Japan | Japan |
|
Hsi-Wei Yen |
ASIAA National Taiwan University | Taiwan |
|
Gaylor Wafflard-Fernandez |
Univ. Grenoble Alpes | France |
|
David Wilner |
CfA Harvard | US |
|
Andrew Winter |
Max Planck Institute for Astronomy | Germany |
|
Lisa Wölfer |
Massachusetts Institute of Technology | US |
|
Tomohiro Yoshida |
National Astronomical Observatory of Japan |
Japan |
|
Brianna Zawadzki |
Wesleyan University | US |
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Publications
The exoALMA papers are published in the Astrophysical Journal Letters exoALMA Focus Issue. For the most up-to-date list and the paper-by-paper summaries, use: https://www.exoalma.com/publications.
| Paper | Title | Lead author | ADS / journal |
|---|---|---|---|
| exoALMA I | Science Goals, Project Design and Data Products | Teague et al. | ADS |
| exoALMA II | Data Calibration and Imaging Pipeline | Loomis et al. | ADS |
| exoALMA III | Line-intensity Modeling and System Property Extraction from Protoplanetary Disks | Izquierdo et al. | ADS |
| exoALMA IV | Substructures, Asymmetries, and the Faint Outer Disk in Continuum Emission | Curone et al. | ADS |
| exoALMA V | Gaseous Emission Surfaces and Temperature Structures | Galloway-Sprietsma et al. | ADS |
| exoALMA VI | Rotating under Pressure: Rotation Curves, Azimuthal Velocity Substructures and Pressure Variations | Stadler et al. | ADS |
| exoALMA VII | Benchmarking Hydrodynamics and Radiative Transfer Codes | Bae et al. | ADS |
| exoALMA VIII | Probabilistic Moment Maps and Data Products Using Nonparametric Linear Models | Hilder et al. | ADS |
| exoALMA IX | Regularized Maximum Likelihood Imaging of Non-Keplerian Features | Zawadzki et al. | ADS |
| exoALMA X | Channel Maps Reveal Complex 12CO Abundance Distributions and a Variety of Kinematic Structures with Evidence for Embedded Planets | Pinte et al. | ADS |
| exoALMA XI | ALMA Observations and Hydrodynamic Models of LkCa 15: Implications for Planetary Mass Companions in the Dust Continuum Cavity | Gardener et al. | ADS |
| exoALMA XII | Weighing and Sizing exoALMA Disks with Rotation Curve Modeling | Longarini et al. | ADS |
| exoALMA XIII | Gas Masses from N2H+ and C18O: A Comparison of Protoplanetary Gas Disk Mass Measurement Techniques | Trapman et al. | ADS |
| exoALMA XIV | Gas Surface Densities in the RXJ1604.3-2130 A Disk from Pressure-Broadened CO Line Wings | Yoshida et al. | ADS |
| exoALMA XV | Interpreting the Height of CO Emission Layer | Rosotti et al. | ADS |
| exoALMA XVI | Predicting Signatures of Large-Scale Turbulence in Protoplanetary Disks | Barraza-Alfaro et al. | ADS |
| exoALMA XVII | Characterizing the Gas Dynamics around Dust Asymmetries | Wölfer et al. | ADS |
| exoALMA XVIII | Interpreting Large Scale Kinematic Structures as Moderate Warping | Winter et al. | ADS |
| exoALMA XIX | Confirmation of Non-thermal Line Broadening in the DM Tau Protoplanetary Disk | Hardiman et al. | Journal |
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Software
The exoALMA software page is maintained at https://www.exoalma.com/software. A selection of tools (with links) is listed below.
- bettermoments — https://github.com/richteague/bettermoments
- wakeflow — https://github.com/TomHilder/wakeflow
- discminer — https://github.com/andizq/discminer
- disksurf — https://github.com/richteague/disksurf
- eddy — https://github.com/richteague/eddy
- MPoL — https://mpol-dev.github.io/MPoL/
- csalt — https://github.com/seanandrews/csalt
- MCFOST — https://github.com/cpinte/mcfost
Much of the calibration and imaging builds on scripts developed for DSHARP and MAPS; the final exoALMA scripts are included with the first data release (see the Data page).
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Funding
Funding acknowledgements are maintained at https://www.exoalma.com/funding.
- Dust Busters: A Marie Skłodowska Curie RISE action funded by the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 823823).
- PROTOPLANETS ERC: ERC under EU Horizon 2020 (PROTOPLANETS), grant agreement No. 101002188.
- UNVEIL ERC: ERC UNVEIL, 101076613 (standard EU/ERC disclaimer applies).
- North American ALMA Science Center: funds supporting the December 2022 workshop at Endicott House; extensive computing resources for calibration and imaging; support for ApJL publication.
- The Australian Research Council: FT170100040, DP180104235, DP220103767, DP240103290.
- The University of Leeds: computing resources for imaging and analysis.
- DiscEvol ERC: ERC DiscEvol, 101039651 (standard EU/ERC disclaimer applies).