A Search for Small-Scale Clumpiness in Orion and W3 High-Mass Star-Forming Regions
L.E.Pirogov, I.I.Zinchenko, L.E.B.Johansson, and J.Yang
TL;DR
This paper investigates small-scale clumpiness in Orion and W3 star-forming regions by analyzing line profile ripples, suggesting emission from numerous unresolved thermal clumps with random velocities.
Contribution
It introduces a method to detect and estimate the number of unresolved thermal clumps in star-forming regions through spectral line profile analysis.
Findings
Detected ripples indicating unresolved clumps in Orion and W3.
Estimated total number of clumps as ~(0.4-4) x 10^5.
Clumps have sizes ~0.1-0.5 pc and move with random velocities.
Abstract
Observations of distinct positions in Orion and W3 revealed ripples on the HCN(1-0), HCO^+(1-0) and CO(1-0) line profiles which can be result of emission of large number of unresolved thermal clumps in the beam that move with random velocities. The total number of such clumps are ~(0.4-4) 10^5 for the areas with linear sizes ~0.1-0.5 pc.
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Taxonomy
TopicsAstrophysics and Star Formation Studies