OPEN SLIT ECHELLE SPECTROSCOPY OF PLANETARY NEBULA M 1-9
| Autor: | J. Bohigas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
abundances [ISM]
abundances Astrophysics::High Energy Astrophysical Phenomena Física Astronomía y Matemáticas Astrophysics::Cosmology and Extragalactic Astrophysics planetary nebulae individual objects (M 1-9) general individual objects (M 1 [ISM] Astrophysics::Solar and Stellar Astrophysics general [planetary nebulae] Astrophysics::Earth and Planetary Astrophysics 9) Astrophysics::Galaxy Astrophysics ISM |
| Zdroj: | Universidad Nacional Autónoma de México UNAM Redalyc-UNAM Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.48 |
| Popis: | "Optical spectroscopy of the entire planetary nebula M 1-9, reveals pronounced density variations, a temperature distribution where Te(N+) is larger than Te(O+2) and abundances indicating that it is a halo planetary nebulae, an association supported by it is very large radial velocity and distance to the galactic plane. The ionized mass is between 0.1 and 0.4 M☉. A uniform density photoionization model (Cloudy, version 10.00) reproduced most of the spectrum, but the intensity of [O III] 4363 °A is much larger than observed. In this model, nebular abundances are smaller than those derived using standard techniques and the stellar temperature and luminosity are 84900ºK and 1025 L☉, which implies that the progenitor probably was a =1 M☉ zero-age main sequence star." |
| Databáze: | OpenAIRE |
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