Our main knowledge about astrophysical environments relies on radiative spectra.
Absorption studies require background sources that are located hapharzadly in …

The maps presented in Paper I are here used to infer the variation of the column densities of
HCO+, DCO+, N 2 H+, and N 2 D+ as a function of distance from the dust peak. These …

We present a numerical method and computer code to calculate the radiative transfer and
excitation of molecular lines. Formulating the Monte Carlo method from the viewpoint of cells …

The BASECOL2012 database is a repository of collisional data and a web service within the
Virtual Atomic and Molecular Data Centre (VAMDC, http://www. vamdc. eu). It contains rate …

Cross-sections and rate coefficients have been calculated for rotational transitions between
levels J≤ 20 of HCO+, induced by collisions with ground state (J= 0) para-H2. Results were …

We have observed galactic λ3mm HCO^+^ absorption along 30 lines of sight toward
compact extragalactic mm-wave continuum sources, using the Plateau de Bure …

To investigate the effects of the UV radiation on the chemistry of nitrogenated molecules, we
have carried out an observational study of the reflection nebula NGC 7023. We have …

We have observed 23 class 0 sources in the HCO+ J= 4–3 and 3–2 lines. The mean
bolometric temperature of the 16 sources with well-determined values is 44 K, and the mean …

The HCO+ and DCO+ molecules are commonly used as tracers in the interstellar medium.
Therefore, accurate rotational rate coefficients of these systems with He and H2 are crucial …

Context. The global context of making numerous data produced by researchers available
requires collecting and organising the data, assigning meaningful metadata, and presenting …