Improved abundances in three halo planetary nebulae

Details Improved abundances in three halo planetary nebulae Improved abundances in three halo planetary nebulae

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..609h&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Mar. 1, 1978, p. 609-613.

Astronomy and Astrophysics

Astrophysics

51

Abundance, Halos, Planetary Nebulae, Helium, Neon, Nitrogen, Oxygen

Scientific paper

Spectrophotometric observations have been obtained of three halo planetary nebulae: 49+88.1 deg, 108-76.1 deg, and K648. The observed line intensities are used to compute temperatures, densities, and abundances of helium, oxygen, nitrogen, and neon with respect to hydrogen. The data show that for all three nebulae, the helium abundance is normal, but oxygen is underabundant with respect to disk planetaries. That the abundance of nitrogen varies from object to object suggests that mixing in differing amounts may have taken place. In 49+88.1 deg, the only halo planetary with detectable forbidden S II or S III emission, sulfur is underabundant by a factor of about 10.

Affiliated with

Also associated with

No associations

Rating

Improved abundances in three halo planetary nebulae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Improved abundances in three halo planetary nebulae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improved abundances in three halo planetary nebulae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1078553