SIMBAD references

2003A&A...405..627T - Astronomy and Astrophysics, volume 405, 627-637 (2003/7-2)

Angular dimensions of planetary nebulae.

TYLENDA R., SIODMIAK N., GORNY S.K., CORRADI R.L.M. and SCHWARZ H.E.

Abstract (from CDS):

We have measured angular dimensions of 312 planetary nebulae from their images obtained in Hα (or Hα+[NII]). We have applied three methods of measurements: direct measurements at the 10% level of the peak surface brightness, Gaussian deconvolution and second-moment deconvolution. The results from the three methods are compared and analysed. We propose a simple deconvolution of the 10% level measurements which significantly improves the reliability of these measurements for compact and partially resolved nebulae. Gaussian deconvolution gives consistent but somewhat underestimated diameters compared to the 10% measurements. Second-moment deconvolution gives results in poor agreement with those from the other two methods, especially for poorly resolved nebulae. From the results of measurements and using the conclusions of our analysis we derive the final nebular diameters which should be free from systematic differences between small (partially resolved) and extended (well resolved) objects in our sample.

Abstract Copyright:

Journal keyword(s): planetary nebulae: general

VizieR on-line data: <Available at CDS (J/A+A/405/627): table1.dat table2.dat>

Simbad objects: 312

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2019.10.20-12:06:17

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