Understanding the chemical evolution of young (high-mass) star-forming regions is a central
topic in star formation research. Chemistry is employed as a unique tool 1) to investigate the …

Context. Stellar feedback from high-mass stars shapes the interstellar medium, and thereby
impacts gas that will form future generations of stars. However, due to our inability to track …

ABSTRACT The Bolocam Galactic Plane Survey (BGPS) is a 1.1 mm continuum survey of
dense clumps of dust throughout the Galaxy covering 170 deg 2. We present spectroscopic …

Aims. The earliest phases of massive star formation are found in cold and dense infrared
dark clouds (IRDCs). Since the detection method of IRDCs is very sensitive to the local …

We present the results of observations of 1882 sources in the Bolocam Galactic Plane
Survey (BGPS) at 1.1 mm with the 10 m Henrich Hertz Telescope simultaneously in HCO+ …

Radial density profiles for the sample of dense cores associated with high-mass star-forming
regions from southern hemisphere have been derived using the data of observations in …

Massive clumps, prior to the formation of any visible protostars, are the best candidates to
search for the elusive massive starless cores. In this work, we investigate the dust and gas …

Aims. We aim at investigating the NH 3/N 2 H+ abundance ratio toward the high-mass star-
forming region AFGL 5142 with high angular resolution in order to study whether the NH 3/N …

The aim of this study is to investigate systematic chemical differentiation of molecules in
regions of high-mass star formation (HMSF). We observed five prominent sites of HMSF in …

Gas density and temperature in star-forming regions around Sh2-235 are derived from
ammonia line observations. This information is used to evaluate formation scenarios and to …