Cold, neutral hydroxyl radicals are Stark decelerated and efficiently loaded into a permanent
magnetic trap. The OH molecules are trapped in the rovibrational ground state at a density …

Context. In recent years, we have detected clear evidence of rotation in more than 5 hot
molecular cores (HMCs). Their identification is confirmed by the fact that the rotation axes …

Abstract The Australia Telescope Compact Array has been used to measure positions with
arcsecond accuracy for 379 masers at the 22-GHz transition of water. The principal …

We report results of an extensive observational campaign of the 6 cm formaldehyde maser
in the young massive stellar object IRAS 18566+ 0408 (G37. 55+ 0.20) conducted from 2002 …

The H92 α recombination line was observed toward six massive star formation regions
(MSFRs), and the H76 α line was observed toward one MSFR. All seven MSFRs were …

We performed new large-scale 12 CO, 13 CO, and C 18 OJ= 1–0 observations of the W 43
giant molecular cloud complex in the tangential direction of the Scutum arm (l∼ 30°) as a …

Context. Hot molecular cores are an early manifestation of massive star formation where the
molecular gas is heated to temperatures> 100 K undergoing a complex chemistry. Aims …

Context. Magnetohydrodynamical simulations show that the magnetic field can drive
molecular outflows during the formation of massive protostars. The best probe to …

We present high-resolution (R= 75,000–100,000) mid-infrared spectra of the high-mass
embedded young star IRS 1 in the NGC 7538 star-forming region. Absorption lines from …

Aims. Revealing the fragmentation, infall, and outflow processes in the immediate
environment around massive young stellar objects is crucial for understanding the formation …