Abundances and radial gradients from disk planetary nebulae: He, N, C, and CL

Details Abundances and radial gradients from disk planetary nebulae: He, N, C, and CL Abundances and radial gradients from disk planetary nebulae: He, N, C, and CL

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.219..231m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 219, no. 2, p. 231-247

Astronomy and Astrophysics

Astrophysics

34

Abundance, Carbon, Chlorine, Classifications, Gradients, Helium, Hydrogen, Nitrogen, Planetary Nebulae, Ratios, Stellar Evolution, Stellar Mass, Tables (Data)

Scientific paper

Chemical abundances of the elements He, N, C, and Cl are presented for disk planetary nebulae, comprising Peimbert types I, II, and III. Average abundances for these classes are determined and compared with the remaining abundances available. The presence of abundance gradients relative to hydrogen for disk nebulae is investigated in a region of about 8 kpc centered in the solar system. It can be concluded that the gradients of the ratios N/H, Cl/H, and probably C/H are similar to the O/H gradient, especially for type II objects.

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