The First Detection of Molecular Activity in the Largest Known Oort Cloud Comet: ALMA Imaging of C/2014 UN271 (Bernardinelli–Bernstein) at 16.6 au from the Sun

The First Detection of Molecular Activity in the Largest Known Oort Cloud Comet: ALMA Imaging of C/2014 UN271 (Bernardinelli–Bernstein) at 16.6 au from the Sun

We report observations of comet C/2014 UN271 (Bernardinelli–Bernstein) carried out on UT 2024 March 8 and 17 at a heliocentric distance ( r _H ) of 16.6 au using the Atacama Large Millimeter/submillimeter Array (ALMA). The CO ( J = 2–1) line at 230 GHz was detected along with continuum emission from...

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Bibliographic Details
Main Authors: Nathan X. Roth, Stefanie N. Milam, Martin A. Cordiner, Dominique Bockelée-Morvan, Nicolas Biver, Michael S. P. Kelley, Anthony J. Remijan, Steven B. Charnley, Carrie E. Holt, Kiernan D. Foster, Joseph Chatelain, Edward Gomez, Sarah Greenstreet, Tim Lister, Helen Usher
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal Letters
Subjects:
Comets
Comae
Molecular spectroscopy
Radio astronomy
High resolution spectroscopy
Radio interferometry
Online Access:https://doi.org/10.3847/2041-8213/add526
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https://doi.org/10.3847/2041-8213/add526

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