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astro-ph2008★ 75 cited
The Evolution of NGC 7027 at Radio Frequencies: A New Determination of the Distance and Core Mass
Albert Zijlstra, P. A. M. van Hoof, R. A. Perley
We present the results of a 25-year program to monitor the radio flux evolution of the planetary nebula NGC7027. We find significant evolution of the spectral flux densities. The f…
astro-ph2003
Introducing EMILI: Computer Aided Emission Line Identification
Brian Sharpee, Robert Williams, Jack A. Baldwin +1
The identification of spectral lines can be a tedious process requiring the interrogation of large spectroscopic databases, but it does lend itself to software algorithms that can…