Diffuse X-ray emission from the Dumbbell Nebula?

You Hua Chu, Karen B. Kwitter, James B. Kaler

Research output: Contribution to journalArticlepeer-review


We have analyzed ROSAT Position Sensitive Proportional Counter pointed observations of the Dumbbell Nebula and find that the previously reported "extended" x-ray emission is an instrumental electronic ghost image at the softest energy band. At slightly higher energy bands, the image of the Dumbbell is not very different from that of the white dwarf HZ43. We conclude that the x-ray emission of the Dumbbell Nebula comes from its central star. A blackbody model is fitted to the spectrum and the best-fit temperature of ≤136 000±10 000 K is in excellent agreement with the Zanstra temperatures.

Original languageEnglish (US)
Pages (from-to)650-655
Number of pages6
JournalAstronomical Journal
Issue number2
StatePublished - Aug 1993

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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