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19992026
most citedA PDR-Code Comparison Study

352 citations · 1.6k across the 43 of their papers we have counts for

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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…