Abstract

BOHIGAS, J.. Open slit echelle spectroscopy of planetary nebula M 1-9. Rev. mex. astron. astrofis [online]. 2012, vol.48, n.2, pp.267-274. ISSN 0185-1101.

Optical spectroscopy of the entire planetary nebula M 1-9, reveals pronounced density variations, a temperature distribution where T_e(N+) is larger than T_e(0+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_ʘ. A uniform density photoionization model (Cloudy, version 10.00) reproduced most of the spectrum, but the intensity of [O III] 4363 Å 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 84900° K and 1025 L_ʘ, which implies that the progenitor probably was a ≈1 M_ʘ zero-age main sequence star.

Keywords : ISM [abundances]; ISM [individual objects (M 1-9)]; planetary nebulae [general].

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