The shape of the LoTr 5 planetary nebula

N Brosch*, Y Hoffman

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

Abstract

We observed the large and faint planetary nebula around IN Com in H alpha and N II light with a coronagraphic charge-coupled device on the Wise Observatory reflector, blocking the light from the central star. Our goal was to provide a second image of the object with which to confirm the features seen in the only published photograph from the paper by Longmore & Tritton reporting the discovery of this object. The nebula is extremely faint, but a combination of images totalling about one and a half hours of exposure shows it fairly well. A novel image processing algorithm has been applied to the noisy image in order to reveal faint extended details of the images, The algorithm is based on a non-linear self-adaptive filter applied to the wavelet transform of the image, The nebula is not round or elliptical, but shows a two-lobed or possibly three-lobed morphology, as well as a peculiar hole-like feature east of the central star. There is definite east-west and slightly less definite north-south asymmetry.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume305
Issue number2
Publication statusPublished - 11-May-1999

Keywords

  • binaries : close
  • circumstellar matter
  • stars : imaging
  • stars : individual : IN Com
  • planetary nebulae : individual : LoTr 5
  • CENTRAL STAR
  • BINARY NUCLEI
  • TRIPLE SYSTEM
  • LT-5
  • MORPHOLOGIES

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