SIMBAD references

2005A&A...436..967W - Astronomy and Astrophysics, volume 436, 967-975 (2005/6-4)

Absolute spectrophotometry of northern compact planetary nebulae.

WRIGHT S.A., CORRADI R.L.M. and PERINOTTO M.

Abstract (from CDS):

We present medium-dispersion spectra and narrowband images of six northern compact planetary nebulae (PNe): BoBn 1, DdDm 1, IC 5117, M 1-5, M 1-71, and NGC 6833. From broad-slit spectra, total absolute fluxes and equivalent widths were measured for all observable emission lines. High signal-to-noise emission line fluxes of Hα, Hβ, [O44Sc III], [N44Sc II], and HeI may serve as emission line flux standards for northern hemisphere observers. From narrow-slit spectra, we derive systemic radial velocities. For four PNe, available emission line fluxes were measured with sufficient signal-to-noise to probe the physical properties of their electron densities, temperatures, and chemical abundances. BoBn 1 and DdDm 1, both type IV PNe, have an Hβ flux over three sigma away from previous measurements. We report the first abundance measurements of M 1-71. NGC 6833 measured radial velocity and galactic coordinates suggest that it is associated with the outer arm or possibly the galactic halo, and its low abundance ([O/H]=1.3x10–4) may be indicative of low metallicity within that region.

Abstract Copyright:

Journal keyword(s): ISM: planetary nebulae: general - techniques: spectroscopic - line: identification - ISM: abundances

Simbad objects: 6

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