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Planetary nebulae and the interstellar medium
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Aller, L. H. |
| Copyright Year | 1986 |
| Description | In addition to available published data on planetary nebulae (PN), some 40 objects largely concentrated towards the galactic center and anticenter regions were included. All were observed with the Lick 3(sup m) telescope and image tube scanner. Abundances of C, N, O, Ne, Cl, and Ar were determined by a procedure in which theoretical models were used to obtain ionization correction factors (ICF). Of the 106 PN, 66 are N-rich and 40 are N-poor. There appear to be no significant differences between the average compositions in the solar neighborhood and the average taken over the entire observable portion of the galaxy. |
| File Size | 126267 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870005643 |
| Archival Resource Key | ark:/13960/t77t2kh8j |
| Language | English |
| Publisher Date | 1986-10-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Oxygen Abundance Planetary Nebulae Nitrogen Carbon Tables Data Neon Chlorides Chemical Composition Electron Energy Sulfur Argon Interstellar Matter Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
