Observations of photometric profiles of two planetary nebulae

Details Observations of photometric profiles of two planetary nebulae Observations of photometric profiles of two planetary nebulae

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.176..149l&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 176, no. 1, Feb. 1991, p. 149-162.

Astronomy and Astrophysics

Astrophysics

Astronomical Photometry, Planetary Nebulae, Stellar Models, Abel Function, Emissivity, Gauss Equation, Morphology, Three Dimensional Models

Scientific paper

It is noted that the Abel integral of a Gaussian function is a Gaussian function. This special property is used in order to develop an analytic method for studying the photometric profile in planetary nebulae. Monochromatic observations have been made at the Haute-Provence Observatory using the RCA-CCD (320 x 512 pixels) mounted at the F/6 Newtonian focus of the 1.2 m telescope. Among the observed nebulae, two of them (NGC 6778 and NGC 7354) are regular enough to test the photometric profile method. The nebular emissivity per volume unit is then obtained for H(+) and O(++) ions.

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