The Region of Triggered Star Formation W40: Observations and Model

TL;DR

This paper investigates triggered star formation in the W40 region using a 'collect and collapse' model, aligning theoretical parameters with observations to understand the formation of low-mass clumps.

Contribution

It applies a 'collect and collapse' model to the W40 region, estimating parameters that match observations and discussing reasons for parameter scatter.

Findings

Model parameters align with observations under high cloud density.

The luminosity of the driving source is higher than previous estimates.

The study explains possible causes for observed parameter variability.

Abstract

A "collect and collapse" model of triggered star formation is used to estimate the parameters of ring-like structure consisted of a sequence of low-mass clumps in the W40 region. The model parameters are close to the observed ones if the density of the cloud in which the HII zone is expanding is fairly high (>~ 10^5 cm^{-3}) and the luminosity of the driving source exceeds previous estimate. Probable reasons for the scatter of the observed parameters of the clumps are discussed.