103 citations · 952 across the 53 of their papers we have counts for
4 papers · 1 filter
The confusion limit on astrometry with SIM
Jayadev Rajagopal, Torsten Boeker, Ronald J. Allen
An important requirement for the Space Interferometry Mission (SIM) is to carry out precision astrometry in crowded fields. This capability is crucial, for example, to accurately m…
The Formation of Molecular Clouds
J. E. Pringle, Ronald J. Allen, S. H. Lubow
In a recent paper, Elmegreen (2000) has made a cogent case, from an observational point of view, that the lifetimes of molecular clouds are comparable to their dynamical timescales…
Cold Molecular Gas, PDRs, and the Origin of HI in Galaxies
Ronald J. Allen
In the currently-accepted model for star formation out of the interstellar gas in galaxies, the basic construction material is assumed to be large clouds of atomic hydrogen (HI). T…
Gas, Dust, and Young Stars in the Outer Disk of M 31
Jean-Charles Cuillandre, James Lequeux, Ronald J. Allen +2
Using the Canada-France-Hawaii Telescope we have obtained deep high-resolution CCD images in V and I of a 28'x28' field in the outer disk of M 31 at ~ 116' from the center along th…