Fredrik L. Schöier

TL;DR: In this paper, the authors present a computer program to calculate the intensities of atomic and molecular lines produced in a uniform medium, based on statistical equilibrium calculations involving collisional and radiative processes and including radiation from background sources.

TL;DR: In this paper, atomic and molecular data for the transitions of a number of astrophysically interesting species are summarized, in-cluding energy levels, statistical weights, Einstein A-coefficients and collisional rate coefficients.

TL;DR: In this article, a large spectral line and continuum survey of eight deeply embedded, low-mass protostellar cores using the SMA highexcitation line emission from 11 molecular species originating in warm and dense gas has been imaged at high angular resolution (1''-3'', typically 200-600 AU) together with continuum emission at 230 GHz (13 mm) and 345 GHz (08 mm).

TL;DR: In this paper, a detailed radiative transfer analysis, combined with an energy balance equation for the gas, was performed to determine some of the basic parameters that characterize circumstellar envelopes, e.g., the stellar mass loss rate, the gas expansion velocity, and the kinetic temperature structure of the gas.

TL;DR: In this article, the reliability of CO multi-transitional line observations as a mass-loss-rate estimator for AGB stars was investigated using new well-calibrated sensors.