Effect of FIR Fluxes on Constraining Properties of YSOs

TL;DR

FIR fluxes are crucial for accurately classifying Young Stellar Objects and constraining their physical properties, as neglecting FIR data can lead to misclassification and underestimation of heating effects.

Contribution

This study demonstrates the significant impact of FIR fluxes on YSO classification and physical parameter estimation, highlighting the importance of FIR data in evolutionary analysis.

Findings

FIR fluxes prevent misclassification of YSO evolutionary stages.

Ignoring FIR data underestimates the heating of YSOs.

FIR observations improve constraints on envelope properties and internal luminosity.

Abstract

Young Stellar Objects (YSOs) in the early evolutionary stages are very embedded, and thus they emit most of their energy at long wavelengths such as far-infrared (FIR) and submillimeter (Submm). Therefore, the FIR observational data are very important to classify the accurate evolutionary stages of these embedded YSOs, and to better constrain their physical parameters in the dust continuum modeling. We selected 28 YSOs, which were detected in the AKARI Far-Infrared Surveyor (FIS), from the Spitzer c2d legacy YSO catalogs to test the effect of FIR fluxes on the classification of their evolutionary stages and on the constraining of envelope properties, internal luminosity, and UV strength of the Interstellar Radiation Field (ISRF). According to our test, one can mis-classify the evolutionary stages of YSOs, especially the very embedded ones if the FIR fluxes are not included. In addition, the total amount of heating of YSOs can be underestimated without the FIR observational data.