ALMA Datacubes and Continuum Maps of the Irradiated Western Wall in Carina
Patrick Hartigan, Maxwell Hummel, Andrea Isella, Turlough Downes

TL;DR
This study uses ALMA observations to analyze how a molecular cloud in Carina responds to intense radiation, revealing detailed structures and the distribution of star-forming cores near a massive star cluster.
Contribution
It provides high-resolution ALMA data of the Western Wall in Carina, showing the molecular response to radiation and identifying 254 C$^{18}$O cores with a mass distribution similar to the stellar IMF.
Findings
C$^{18}$O cores are starless and lack pillars.
The mass distribution of cores resembles the stellar IMF.
No direct evidence of triggered star formation was found.
Abstract
We present ALMA observations of the continuum and line emission of CO, CO, CO, and [C I] for a portion of the G287.38-0.62 (Car 1-E) region in the Carina star-forming complex. The new data record how a molecular cloud responds on subarcsecond scales when subjected to a powerful radiation front, and provide insights into the overall process of star formation within regions that contain the most massive young stars. The maps show several molecular clouds superpose upon the line of sight, including a portion of the Western Wall, a highly-irradiated cloud situated near the young star cluster Trumpler 14. In agreement with theory, there is a clear progression from fluoresced H, to [C I], to CO with distance into the PDR front. Emission from optically thick CO extends across the region, while CO, [C I] and especially CO are more optically…
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Space Exploration and Technology · Stellar, planetary, and galactic studies
