Physical characteristics of two low-excitation planetary nebulae: HE 2-277 and HE 1312

Details Physical characteristics of two low-excitation planetary nebulae: HE 2-277 and HE 1312 Physical characteristics of two low-excitation planetary nebulae: HE 2-277 and HE 1312

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987rmxaa..15...89d&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica (ISSN 0185-1101), vol. 15, Dec. 1987, p. 89-93.

Physics

Optics

9

Emission Spectra, Line Spectra, Planetary Nebulae, Stellar Composition, Abundance, Cassegrain Optics, Excitation, H Beta Line, Positive Ions

Scientific paper

New spectroscopic data on two low-excitation planetary nebulae (He 2-277 and He 1312) are presented. He 2-277 is probably a Type II planetary but has an abundance deficiency of about a factor of three with respect to the 'cosmic' values. The estimated distances to He 2-277 and He 1312 are respectively 0.57 kpc and 1.7 kpc and the Zanstra temperatures of the central stars are 30,400 and 21,300 K, consistent with the low-excitation characteristics of the nebulae.

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