The identification of PM 1-322 as a new young high-density planetary nebulae*
Observatório Nacional-MCT, Rua José Cristino 77, CEP 20921-400, São Cristóvão, Rio de Janeiro-RJ, Brazil e-mail: firstname.lastname@example.org
2 Instituto de Astrofísica de Andalucía, CSIC, Apdo.3004, 18080 Granada, Spain
Accepted: 30 November 2004
We report spectroscopic observations of a new planetary nebula PM 1-322, which has not yet been identified. This object was found during a northern survey of post-AGB and planetary nebulae candidates selected from García-Lario et al. (1997, A&AS, 126, 479) and Preite-Martinez (1988, A&AS, 76, 317). Here we present the main spectroscopic features including a list of the intensities of the identified emission lines. The main spectral characteristic of PM 1-322 is the presence of a very strong [O iii] λ4363 emission line (I[OIII]4363/Hβ 120) indicating high electron densities (log). A comparison with similar objects strongly suggests that PM 1-322 is a very young planetary nebula, although the posibility of a symbiotic nature can not be ruled out.
Key words: planetary nebulae: individual: PM 1-322
© ESO, 2005