Early results from ChanPLaNS: Mystery of hard X-ray emitting CSPNe

Rodolfo Montez, J. H. Kastner, B. Balick*, E. Behar, E. Blackman, V. Bujarrabal, Y. H. Chu, R. Corradi, O. De Marco, A. Frank, D. Frew, M. Guerrero, S. Kwok, J. A. Lopez, B. Miszalski, J. Nordhaus, Q. Parker, R. Sahai, C. Sandin, D. SchoenbernerN. Soker, J. Sokoloski, W. Steffen, T. Ueta, E. Villaver, A. Zijlstra

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We are presently using the Chandra X-ray Observatory to conduct the first systematic X-ray survey of planetary nebulae (PNe) in the solar neighborhood. The Chandra Planetary Nebula Survey (ChanPlaNS) is a 570 ks Chandra Cycle 12 Large Program targeting 21 high-excitation PNe within ∼1.5 kpc of Earth. When complete, this survey will provide a suite of new X-ray diagnostics that will inform the study of late stellar evolution, binary star astrophysics, and wind interactions. Among the early results of ChanPlaNS (when combined with archival Chandra data) is a surprisingly high detection rate of relatively hard X-ray emission from CSPNe. Specifically, X-ray point sources are clearly detected in roughly half of the ∼30 high-excitation PNe observed thus far by Chandra, and all but one of these X-ray-emitting CSPNe display evidence for a hard (few MK) component in their Chandra spectra. Only the central star of the Dumbbell appears to display "pure" hot blackbody emission from a ∼200 kK hot white dwarf photosphere in the X-ray band. Potential explanations for the"excess" hard X-ray emission detected from the other CSPNe include late-type companions (heretofore undetected, in most cases) whose coronae have been rejuvenated by recent interactions with the mass-losing WD progenitor, non-LTE effects in hot white dwarf photospheres, self-shocking variable winds from the central star, and slow (re-)accretion of previously ejected red giant envelope mass.

Original languageEnglish
Title of host publicationPlanetary Nebulae
Subtitle of host publicationAn Eye to the Future
EditorsArturo Manchado, Letizia Stanghellini, Detlef Schonberner
Pages450-451
Number of pages2
EditionS283
DOIs
StatePublished - Jul 2011

Publication series

NameProceedings of the International Astronomical Union
NumberS283
Volume7
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

Keywords

  • X-rays: stars
  • planetary nebulae: general
  • stars: white dwarfs
  • surveys

Fingerprint Dive into the research topics of 'Early results from ChanPLaNS: Mystery of hard X-ray emitting CSPNe'. Together they form a unique fingerprint.

Cite this