High-resolution X-ray spectroscopy of BD +30°3639

Joel H. Kastner*, Sam Yu Young, John Houck, Ehud Behar, Raanan Nordon, Noam Soker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present preliminary results from the first X-ray gratings spectrometer observations of a planetary nebula, (PN). We have used the Chandra X-ray Observatory Low Energy Transmission Gratings Spectrometer (LETGS) to observe the bright, diffuse X-ray source within the well-studied BD +30°3639. The LETGS spectrum of BD +30°3639 displays prominent and well-resolved emission lines of H-like C, O, and Ne and He-like O and Ne. Initial modeling indicates a plasma temperature TX ∼ 2.5 × 106 K and abundance ratios of C/O ∼ 20, N/O ≲ 1, Ne/O ∼ 4, and Fe/O ∼ 0.1. These results suggest that the X-ray-emitting plasma is dominated by the shocked fast wind from the emerging PN core, where this wind gas likely originated from the intershell region of the progenitor asymptotic giant branch star.

Original languageEnglish
Pages (from-to)169-172
Number of pages4
JournalProceedings of the International Astronomical Union
Issue number234
StatePublished - Apr 2006
Externally publishedYes


  • Planetary nebulae: individual (BD +30°3639)
  • Stars: mass loss
  • X-rays: individual (BD +30°3639)

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