XMM-Newton observations of the bipolar planetary nebulae NGC 2346 and NGC 7026

Robert A. Gruendl, Martín A. Guerrero, You Hua Chu, Rosa M. Williams

Research output: Contribution to journalArticlepeer-review

Abstract

We have obtained X-ray observations of the bipolar planetary nebulae (PNe) NGC 2346 and NGC 7026 with XMM-Newton. These observations detected difluse X-ray emission from NGC 7026 but not from NGC 2346. The X-ray emission from NGC 7026 appears to be confined within the bipolar lobes of the PN and has spectral properties suggesting a thermal plasma emitting at a temperature of 1.1 -0.2+0.5 × 106 K. The X-ray spectrum of NGC 7026 is modeled using nebular and stellar abundances to assess whether a significant amount of nebular material has been mixed into the shocked wind, but the results of this comparison are not conclusive owing to the small number of counts detected. Observations of bipolar PNe indicate that diffuse X-ray emission is much less likely detected in open-lobed nebulae than closed-lobed nebulae, possibly because open-lobed nebulae do not have strong fast winds or are unable to retain hot gas.

Original languageEnglish (US)
Pages (from-to)339-344
Number of pages6
JournalAstrophysical Journal
Volume653
Issue number1 I
DOIs
StatePublished - Dec 10 2006

Keywords

  • Planetary nebulae: general
  • Planetary nebulae: individual (NGC 2346, NGC 7026)
  • Stars: winds, outflows
  • X-rays: ISM

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'XMM-Newton observations of the bipolar planetary nebulae NGC 2346 and NGC 7026'. Together they form a unique fingerprint.

Cite this