A model for HCO+ line emission in the young planetary nebula NGC 7027.

Details A model for HCO+ line emission in the young planetary nebula NGC 7027. A model for HCO+ line emission in the young planetary nebula NGC 7027.

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jbnun..27..321j&link_type=abstract

Journal of Beijing Normal University (Natural Sciences, Vol. 27, No. 3, p. 321 - 326

Computer Science

Planetary Nebulae: Models, Planetary Nebulae: Emission Lines, Planetary Nebulae: Line Formation

Scientific paper

A model is constructed for newly discovered HCO+ line emission in the young planetary nebula NGC 7027. The theoretical profile of HCO+ emission line at 89.2 GHz calculated based on a model of double circumstellar shells with different expanding velocities. Comparing it with observational data, the expanding velocities and radius of double shells are obtained and the line profile agrees perfectly with the observation of HCO+ line emission. It shows that the double shell model may play an important role in forming the line profile of the young planetary nebula.

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