Problems of Star Formation Theory and Prospects of Submillimeter Observations

TL;DR

This paper reviews the current state of star formation theory and emphasizes the need for advanced submillimeter observations, especially space-based interferometry, to resolve key physical processes in star-forming regions.

Contribution

It highlights the limitations of existing observational tools and advocates for space-based interferometers to address unresolved problems in star formation physics.

Findings

Current ground-based and space telescopes lack sufficient resolution and sensitivity.

Submillimeter observations are crucial for studying early star formation stages.

Space-based interferometry is necessary for detailed insights into star-forming regions.

Abstract

We consider current state of star formation theory and requirements to observations in millimeter and submillimeter ranges which are necessary for resolution of the most actual problems of the physics of star formation. Two key features of star-forming regions which define observational requirements to their studies, are relatively low energy of processes that take place there and smallness of corresponding spatial scales. This is especially true for the objects in the latest stages of ``pre-stellar'' evolution, that is, hot cores, hyper- and ultracompact HII regions, and protoplanetary disks. Angular resolution, sensitivity, and spectral coverage in existing projects of ground-based and space telescopes of submillimeter and millimeter range are not completely adequate to necessary requirements. To obtain detailed information on star-forming regions as well as on individual protostars it is necessary to employ a space-based interferometer.