A General Catalogue of Molecular Hydrogen Emission-Line Objects (MHOs) in Outflows from Young Stars

TL;DR

This paper compiles a comprehensive catalogue of Molecular Hydrogen emission-line Objects (MHOs) associated with outflows from young stars, enhancing the understanding of star formation processes through near-infrared observations.

Contribution

It provides the first extensive, unified catalogue of MHOs in the Milky Way, including both low and high-mass star-forming regions, and integrates HH objects detected in H2 emission.

Findings

Catalogue includes numerous MHOs across various star-forming regions.

Includes both embedded and visible outflows from young stars.

Complements existing Herbig-Haro object databases.

Abstract

We present a catalogue of Molecular Hydrogen emission-line Objects (MHOs) in outflows from young stars, most of which are embedded. All objects are identified in the near-infrared lines of molecular hydrogen, all reside in the Milky Way, and all are associated with jets or molecular outflows from young stars. Objects in both low and high-mass star forming regions are included. This catalogue complements the existing database of Herbig-Haro objects; indeed, for completeness, HH objects that are detected in H2 emission are included in the MHO catalogue.