Class I methanol masers in low-mass star formation regions
  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 $5\times 10^5$ K. The results are
"marginally" consistent with the turbulent model of maser emission.
