257 datasets found

We present the results of our second search for 6.7-GHz methanol masers towards colour-selected IRAS sources. Five hundred and twenty IRAS sources that meet the far-infrared...

An update is presented of the Arcetri Atlas of water masers (Comoretto et al. 1990A&AS...84..179C). It contains the results of observations of water masers with the Medicina...

The association between galactic H2O masers and IRAS sources from the Point Source Catalog (Cat. II/125) is established for 442 sources out of a list of 505 objects, which...

Understanding the launching mechanism of winds and jets remains one of the fundamental challenges in astrophysics. The``Protostellar Outflows at the Earliest Stages'' (POETS)...

We present the results of a search for ammonia maser emission in 119 Galactic high-mass star-forming regions (HMSFRs) known to host 22GHz H_2_O maser emission. Our survey has...

Maser flares are of particular significance for the study of massive star formation as they not only signal but also provide unique insights into transient phenomena such as...

We report the discovery and analysis of a periodic methanol maser in the massive protostar IRAS 20216+4104. To obtain the light curve, we used the 6.7GHz methanol maser spectra...

Class I methanol masers are known to be associated with shocked outflow regions around massive protostars, indicating a possible link between the maser properties and those of...

The deuteration of molecules forming in the ices such as methanol (CH_3_OH) is sensitive to the physical conditions during their formation in dense cold clouds and can be probed...

We report the discovery of widespread maser emission in non-metastable inversion transitions of NH_3_ toward various parts of the Sagittarius B2 molecular cloud and star-forming...

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...

The observational counterpart of theoretically predicted first hydrostatic cores (FHSC) have been hunted in the interstellar medium for nearly two decades now. Distinguishing...

The massive young stellar object (MYSO) G358.93-0.03-MM1 showed an extraordinary NIR/(sub)mm-dark and FIR-loud accretion burst closely associated with flares of several class II...

Cyanopolyynes (HC_2n+1_N, n=1,2,3), which are the linear carbon chain molecules, are precursors for the prebiotic synthesis of simple amino acids. They are important for...

Hyper-compact (HC) or ultra-compact HII regions are the first manifestations of the radiation feedback from a newly born massive star. Therefore, their study is fundamental to...

Water masers emitting at a radiofrequency of 22GHz are often found in the circumstellar envelopes of evolved stars. We monitored the H_2_O maser emission of a larger sample of...

We aim to study the time evolution of the SiO maser lines in Mira-type and semi-regular variables at short timescales. We observed the SiO maser lines at 7mm and 3mm using the...

The excited states of OH masers detected in the environment of high-mass young stellar objects (HMYSOs) are important for improving our understanding of the physical conditions...

Water megamaser emission at 22GHz has proven to be a powerful tool for astrophysical studies of active galactic nuclei (AGN) because it allows an accurate determination of the...

We present multi-epoch observations with the VLBA of SiO maser emission in the v=1, J=1-0 transition at 43GHz from the remnant of the red nova V838 Mon. We model the positions...