An Investigation on the Morphological Structure of IC59: A New Type of Morphology of BRCs?

TL;DR

This study uses SPH simulations based on the RDI model to explore the formation of a new BRC morphology, type M, in nebula IC59, challenging previous assumptions about star formation in these structures.

Contribution

It introduces the existence of a new type of BRC morphology, type M, confirmed through simulations aligned with observations, and questions the role of RDI in star formation within these structures.

Findings

Confirmed the existence of type M BRC morphology.

Identified conditions for the formation of type M BRC.

Ruled out RDI-triggered star formation in observed type M BRCs.

Abstract

With references to recent observational results on the nebula IC59, we applied our previously developed Smoothed Particle Hydrodynamics (SPH) code which is based on Radiative Driven Implosion (RDI) model, to investigate the possible formation mechanism for the observed morphological structures of differently shaped BRCs. The simulation results confirmed the existence of the 4th type morphology of BRCs -- type M BRC. We are able to find the necessary condition for the appearance of the type M BRC based on the fact that the simulated physical properties of the cloud are consistent with observations on IC59. More importantly, the prospect of RDI triggered star formation by RDI model in all of the observed type M BRCs is ruthlessly eliminated.