activity
20202026
most citedUnusually High CO Abundance of the First Active Interstellar Comet

114 citations · 230 across the 21 of their papers we have counts for

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Showing 2025Show all

7 papers · 1 filter

astro-ph.EP2025

CHOH and HCN in Interstellar Comet 3I/ATLAS Mapped with the ALMA Atacama Compact Array: Distinct Outgassing Behaviors and a Remarkably High CHOH/HCN Production Rate Ratio

Nathan X. Roth, Martin A. Cordiner, Dominique Bockelée-Morvan +15

We report the detection of methanol (CHOH) toward interstellar comet 3I/ATLAS using the Atacama Compact Array of the Atacama Large Millimeter/Submillimeter Array (ALMA) on UT 2…

astro-ph.EP2025

The Evolution in Coma Molecular Composition of Comet C/2017 K2 (PanSTARRS) Across the HO Sublimation Zone: ALMA Imaging of an HO-Dominated Coma

Nathan X. Roth, Stefanie N. Milam, Martin A. Cordiner +8

We report a survey of molecular emission from cometary volatiles using the Atacama Large Millimeter/Submillimeter Array (ALMA) toward comet C/2017 K2 (PanSTARRS) carried out on UT…

astro-ph.EP2025★ 13 cited

JCMT detection of HCN emission from 3I/ATLAS at 2.1 AU

Iain M. Coulson, Yi-Jehng Kuan, Steven B. Charnley +8

We report the detection of HCN () rotational emission from comet 3I/ATLAS at a heliocentric distance of 2.13 AU with the James Clerk Maxwell Telescope (JCMT). Observations w…

astro-ph.EP2025★ 1 cited

JWST detection of a carbon dioxide dominated gas coma surrounding interstellar object 3I/ATLAS

Martin A. Cordiner, Nathaniel X. Roth, Michael S. P. Kelley +10

3I/ATLAS is the third confirmed interstellar object to visit our Solar System, and only the second to display a clear coma. Infrared spectroscopy with the James Webb Space Telescop…

astro-ph.EP2025★ 14 cited

A D/H Ratio Consistent with Earth's Water in Halley-type Comet 12P from ALMA HDO Mapping

M. A. Cordiner, E. L. Gibb, Z. Kisiel +18

Isotopic measurements of Solar System bodies provide a primary paradigm within which to understand the origins and histories of planetary materials. The D/H ratio in particular, he…

astro-ph.EP2025★ 6 cited

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

Nathan X. Roth, Stefanie N. Milam, Martin A. Cordiner +12

We report observations of comet C/2014 UN271 (Bernardinelli-Bernstein) carried out on UT 2024 March 8 and 17 at a heliocentric distance () of 16.6 au using the Atac…

astro-ph.EP2025

A JWST Study of the Remarkable Oort Cloud Comet C/2017 K2 (PanSTARRS)

Charles E. Woodward, Dominique Bockelee-Morvan, David E. Harker +4

Comets, during their journeys into the inner solar system, deliver volatile gases, organics, and particulates into their comae that provide crucial information for assessing the ph…