0.8-1.6 micron spectroscopy of the planetary nebula NGC 7027

Details 0.8-1.6 micron spectroscopy of the planetary nebula NGC 7027 0.8-1.6 micron spectroscopy of the planetary nebula NGC 7027

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...384..536r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 384, Jan. 10, 1992, p. 536-544. Research supported by Aerospace Corp.

Astronomy and Astrophysics

Astrophysics

22

Astronomical Spectroscopy, Emission Spectra, Line Spectra, Planetary Nebulae, Red Shift, Spectrum Analysis

Scientific paper

Spectroscopy from 0.76 to 1.62 micron of the planetary nebula NGC 7027 is examined with emphasis on the weak emission lines redward of 1.1 micron, some of them previously undetected, and on the near-infrared continuum. The weak emission features include lines of He I and He II, O I, forbidden P II, and forbidden Fe II. Unidentified lines have been detected at 1.2325 and 1.2443 micron. The reddening derived from the hydrogen lines is E(B-V) = 0.90 +/- 0.08, while E(B-V) = 0.77 +/- 0.19 is measured from the He II features. No evidence is found in this spectral range for any of the broad emission features associated with dust, such as those which are prominent in the thermal infrared.

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