FIR extended emission from cold gas and dust in Blue Compact Dwarf Galaxies: the anomalous cases of POX 186 and UM 461

TL;DR

This paper discusses Herschel FIR observations of Blue Compact Dwarf galaxies, revealing unexpected cold gas and dust properties, and highlights how future SPICA observations will improve detection of faint cold gas and dust structures.

Contribution

It introduces new insights into the cold gas and dust in BCD galaxies and emphasizes the potential of SPICA to detect faint extended cold gas/dust disks and emission lines.

Findings

Dust and cold gas are colder and less accounted for than expected.

Not all dust and cold gas in BCDs are detected, indicating complexity.

Future SPICA observations will significantly enhance detection capabilities.

Abstract

FIR observation of BCD galaxies with Herschel has revealed a wealth of new insights in these objects which are thought to resemble high-redshift forming galaxies. Dust and cold gas showed to be colder, in more or less quantities than expected and of uncertain origin. However, not unlike in the local universe, not all the dust or the cold gas is accounted for, making it more challenging. SPICA and its factor 10 to 100 in sensitivity will allow to image the faint extended cold gas/dusty disks in BCDGs in addition to detect faint C and O lines only marginally or not at all detected by Herschel/