Discovery of multiple shells around the planetary nebula IC 418

G. Ramos-Larios*, R. Vázquez, M. A. Guerrero, L. Olguín, R. A. Marquez-Lugo, H. Bravo-Alfaro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We have analysed optical, near- and mid-IR images of the bright planetary nebula (PN) IC418. These images probe unambiguously for the first time a number of low surface brightness structures and shells around the bright main nebula, including radial filaments or rays, a system of three concentric rings and two detached haloes with sizes ~150arcsec and , respectively. The main nebula is slightly off-centred with respect to the elliptical outer halo. The time lapse between the two haloes is 10000-50000yr, whereas the time lapse between the three concentric rings is ~630yr. We emphasize the advantages of near- and mid-IR imaging for the detection of faint structures and shells around optically bright nebulae.

Original languageEnglish
Pages (from-to)3753-3760
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume423
Issue number4
DOIs
StatePublished - Jul 2012

Keywords

  • ISM: jets and outflows
  • ISM: lines and bands
  • Infrared: ISM
  • Planetary nebulae: individual: IC418

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