Aims. Surveys of the Milky Way at various wavelengths have changed our view of star
formation in our Galaxy considerably in recent years. In this paper we give an overview of …

Class II methanol (CH 3 OH) masers are amongst the clearest signposts of recent high-mass
star formation (HMSF). A complete catalogue outlines the distribution of star formation in the …

We sort 4683 molecular clouds between 10< ℓ< 65 from the Bolocam Galactic Plane Survey
based on observational diagnostics of star formation activity: compact 70 μm sources, mid-IR …

Context. Massive-star formation and the processes involved are still poorly understood. The
ATLASGAL survey provides an ideal basis for detailed studies of large numbers of massive …

Context. Methanol masers of Class I (collisionally pumped) and Class II (radiatively pumped)
have been studied in great detail in our Galaxy in a variety of astrophysical environments …

In this paper, we present a database of class I methanol masers. The compiled information
from the available literature provides an open and fast access to the data on class I …

Context. Observational identification of a solid evolutionary sequence for high-mass star-
forming regions is still missing. Spectroscopic observations give the opportunity to test …

Context. Recent studies have shown that 6.7 GHz methanol maser flares can be a powerful
tool for verifying the mechanisms of maser production and even the specific signatures of …

We present the unambiguous discovery of six new class II methanol maser transitions, three
of which are torsionally excited (vt= 1). The newly discovered 6.18 GHz 17− 2→ 18− 3 E (vt …

In 2019 September, a sudden flare of the 6.7 GHz methanol maser was observed toward the
high-mass young stellar object (HMYSO) G24. 33+ 0.14. This may represent the fourth …