Carina's Pillars of Destruction: the view from ALMA
P. D. Klaassen (1), M. R. Reiter (1), A.F. McLeod (2,3), J.C. Mottram, (4), J.E. Dale (5), and M. Gritschneder (6) ((1) UK Astronomy Technology, Center, (2) Berkeley, (3) Texas Tech, (4) MPIA, (5) U. Hertfordshire, (6), LMU)

TL;DR
This study uses ALMA observations of 13 pillars in Carina to analyze their kinematics, providing insights into star formation feedback effects and testing theoretical models of pillar formation.
Contribution
First ALMA ACA survey of Carina pillars that discriminates between feedback models based on detailed kinematic measurements.
Findings
Pillar velocity dispersions are generally less than 1 km/s.
Outer layers of pillars show minimal internal motion offsets.
Some pillars exhibit velocity offsets from parental clouds, indicating stochastic development.
Abstract
Forming high-mass stars have a significant effect on their natal environment. Their feedback pathways, including winds, outflows, and ionising radiation, shape the evolution of their surroundings which impacts the formation of the next generation of stars. They create or reveal dense pillars of gas and dust towards the edges of the cavities they clear. They are modelled in feedback simulations, and the sizes and shapes of the pillars produced are consistent with those observed. However, these models predict measurably different kinematics which provides testable discriminants. Here we present the first ALMA Compact Array (ACA) survey of 13 pillars in Carina, observed in CO, CO and CO J=2-1, and the 230 GHz continuum. The pillars in this survey were chosen to cover a wide range in properties relating to the amount and direction of incident radiation, proximity to…
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