Spectrophotometry of three planetary nebulae |
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| Authors: | M. A. Kazarian Elma S. Parsamian Laura Parrao |
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| Affiliation: | (1) Yerevan State University, Armenia;(2) V.A. Ambartsumian Byurakan Astrophysical Observartory, Armenia;(3) Institute of Astronomy of the National Autonomous University of Mexico, USA |
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| Abstract: | The results of a spectroscopic investigation of three possible planetary nebulae, K4- 53, K4- 55, and K4- 57, are presented. It is shown that K4- 53 and K4- 55 are planetary nebulae while K4- 57 can be considered with high probability to be one. The temperatures of the nuclei of these nebulae are determined by Ambartsumian’s method. The optical depths for Lc photons in the region of λ ≤ 912 Å are determined. An anomalously high nitrogen abundance is observed in K4- 55. |
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