The calculation of the molecular column density from molecular spectral (rotational or ro-
vibrational) transition measurements is one of the most basic quantities derived from …

The optically thin critical densities and the effective excitation densities to produce a 1 K
km/s (or 0.818 Jy km/s) spectral line are tabulated for 12 commonly observed dense gas …

An examination of the uses of data within a changing knowledge infrastructure, offering
analysis and case studies from the sciences, social sciences, and humanities.“Big Data” is …

Binary formation is an important aspect of star formation. One possible route for close-in
binary formation is disk fragmentation,–. Recent observations show that small-scale …

Star formation lies at the center of a web of processes that drive cosmic evolution:
generation of radiant energy, synthesis of elements, formation of planets, and development …

One puzzle in understanding how stars form in clusters is the source of mass—is all of the
mass in place before the first stars are born, or is there an extended period when the cluster …

Whether or not molecular clouds and embedded cloud fragments are stable against
collapse is of utmost importance for the study of the star formation process. Only" …

The Green Bank Ammonia Survey: First Results of NH3 Mapping of the Gould Belt - IOPscience
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Abstract We present Submillimeter Array (SMA) λ= 0.88 and 1.3 mm broad-band
observations, and Very Large Array (VLA) observations in NH 3 (J, K)=(1, 1) up to (5, 5), H 2 …

ABSTRACT A key parameter to the description of all star formation processes is the density
structure of the gas. In this Letter, we make use of probability distribution functions (PDFs) of …