A newly discovered carbon-poor planetary nebula - PN 242-37.1

Details A newly discovered carbon-poor planetary nebula - PN 242-37.1 A newly discovered carbon-poor planetary nebula - PN 242-37.1

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237..454p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 2, Oct. 1990, p. 454-460. Research supported by the Fondo Nacional de

Astronomy and Astrophysics

Astrophysics

16

Carbon, Planetary Nebulae, Stellar Spectrophotometry, Abundance, Electron Energy, Oxygen, Stellar Spectra, Ultraviolet Spectroscopy

Scientific paper

An emission line object with galactic coordinates l = 242.17 deg and b = - 37.11 deg corresponding to a previously unreported very high-excitation planetary nebula is described. The spectrophotometric data obtained in October 1988 is detailed, as well as the UV observations from a satellite in November 1988. Reddening and physical conditions are outlined along with ionic abundances. Numerical models calculated with a computer code solving the ionization and temperature structure of a steady-state spherically symmetric nebula photoionized by a central source are covered. It is pointed out that the low nebula C abundance in PN 242-37.1 suggests that its progenitor was a metal-poor star of low mass, which did not undergo the third dredge-up episode.

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