The Corona Australis Star Forming Region

TL;DR

The paper reviews the Corona Australis star forming region, highlighting its proximity, diverse stellar population including brown dwarfs, and extensive multi-wavelength observations that reveal its complex structure and star formation activity.

Contribution

It provides a comprehensive overview of the region's stellar content, structure, and observational studies, emphasizing the diversity of star types and the extent of multi-wavelength data collected.

Findings

Nearby at 130 pc, active star formation in Corona Australis.

Presence of 55 optically detected members, including brown dwarfs.

Extensive multi-wavelength surveys conducted in the region.

Abstract

At a distance of about 130 pc, the Corona Australis molecular cloud complex is one of the nearest regions with ongoing and/or recent star formation. It is a region with highly variable extinction of up to AV~45 mag, containing, at its core, the Coronet protostar cluster. There are now 55 known optically detected members, starting at late B spectral types. At the opposite end of the mass spectrum, there are two confirmed brown dwarf members and seven more candidate brown dwarfs. The CrA region has been most widely surveyed at infrared wavelengths, in X-rays, and in the millimeter continuum, while follow-up observations from centimeter radio to X-rays have focused on the Coronet cluster.