Stripping of a planetary nebula from the globular cluster M22

Kazimierz J. Borkowski, Zlatan Tsvetanov, J. Patrick Harrington

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

High-spatial resolution imaging in the [O III] λ5007 line of a planetary nebula (PN) in the globular cluster M22 reveals a strongly asymmetric (half-moon shaped) nebular morphology. We confirm that this peculiar morphology is caused by the distortion of stellar ejecta by the ram pressure of the ambient interstellar medium (ISM) through which the cluster is moving with a high velocity of 200 km s-1. Emission knots visible in the leading (upstream) nebular section confirm theoretical expectations that the shell should have been fragmented by the Rayleigh-Taylor instability. Stripping of the PN from M22 by the ambient ISM is the first direct evidence for removal of gas from globular clusters. M22 is at a favorable location for the ram-pressure stripping to be effective, only 400 pc below the Galactic plane, well within a 2 kpc thick layer of ionized gas enveloping the plane. Ionized (or possibly neutral) gas in this layer, with a hydrogen density of ∼0.1 cm-3, is responsible for the observed interaction.

Original languageEnglish
JournalAstrophysical Journal
Volume402
Issue number2 PART 2
Publication statusPublished - 10 Jan 1993
Externally publishedYes

Fingerprint

ram
planetary nebulae
stripping
globular clusters
Taylor instability
neutral gases
ionized gases
natural satellites
ejecta
gas
upstream
spatial resolution
Moon
high resolution
hydrogen
gases
shell
interactions

Keywords

  • Globular clusters individual (M22)
  • Hydrodynamics
  • Planetary nebulae: individual (IRAS 18333-2357)

ASJC Scopus subject areas

  • Space and Planetary Science
  • Nuclear and High Energy Physics

Cite this

Borkowski, K. J., Tsvetanov, Z., & Harrington, J. P. (1993). Stripping of a planetary nebula from the globular cluster M22. Astrophysical Journal, 402(2 PART 2).

Stripping of a planetary nebula from the globular cluster M22. / Borkowski, Kazimierz J.; Tsvetanov, Zlatan; Harrington, J. Patrick.

In: Astrophysical Journal, Vol. 402, No. 2 PART 2, 10.01.1993.

Research output: Contribution to journalArticle

Borkowski, KJ, Tsvetanov, Z & Harrington, JP 1993, 'Stripping of a planetary nebula from the globular cluster M22', Astrophysical Journal, vol. 402, no. 2 PART 2.
Borkowski, Kazimierz J. ; Tsvetanov, Zlatan ; Harrington, J. Patrick. / Stripping of a planetary nebula from the globular cluster M22. In: Astrophysical Journal. 1993 ; Vol. 402, No. 2 PART 2.
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