Class I methanol masers in low-mass star formation regions
Journal article, 2017

We present a review of the properties of Class I methanol masers detected in low-mass star forming regions (LMSFRs). These masers, henceforth called LMMIs, are associated with postshock gas in the lobes of chemically active outflows in LMSFRs NGC1333, NGC2023, HH25, and L1157. LMMIs share the main properties with powerful masers in regions of massive star formation and are a low-luminosity edge of the total Class I maser population. However, the exploration of just these objects may push forward the exploration of Class I masers, since many LMSFRs are located only 200-300 pc from the Sun, making it possible to study associated objects in detail. EVLA observations with a 0.2″ spatial resolution show that the maser images consist of unresolved or barely resolved spots with brightness temperatures up to 5 × 105 K. The results are marginally consistent with the turbulent model of maser emission.

ISM: Jets and outflows

radio lines: ISM



S. V. Kalenskii

Russian Academy of Sciences

S. Kurtz

Universidad Nacional Autonoma de Mexico

P. Hofner

National Radio Astronomy Observatory Socorro

Per Bergman

Chalmers, Earth and Space Sciences, Onsala Space Observatory

C. M. Walmsley

Dublin Institute for Advanced Studies

P. Golysheva

Moscow State University

Proceedings of the International Astronomical Union

1743-9213 (ISSN) 1743-9221 (eISSN)

Vol. 13 S336 33-36

Subject Categories

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics

Computer Vision and Robotics (Autonomous Systems)


Onsala Space Observatory



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