Keywords
Emission Spectra
Line Spectra
Planetary Nebulae
Stellar Composition
Abundance
Cassegrain Optics
Excitation
H Beta Line
Positive Ions
Astronomy
Distances:Planetary Nebulae
Metal Abundances:Planetary Nebulae
Planetary Nebulae:Distances
Planetary Nebulae:Metal Abundances
Planetary Nebulae:Spectroscopy
Spectroscopy:Planetary Nebulae
Line Spectra
Planetary Nebulae
Stellar Composition
Abundance
Cassegrain Optics
Excitation
H Beta Line
Positive Ions
Astronomy
Distances:Planetary Nebulae
Metal Abundances:Planetary Nebulae
Planetary Nebulae:Distances
Planetary Nebulae:Metal Abundances
Planetary Nebulae:Spectroscopy
Spectroscopy:Planetary Nebulae
How to Cite
Physical characteristics of two low-excitation planetary nebulae: He2-277 and He 1312. (1987). Revista Mexicana De Astronomía Y Astrofísica, 15(1), 89-93. https://astronomia.unam.mx/journals/rmxaa/article/view/1987rmxaa..15...89d
Abstract
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.Similar Articles
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