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  • Aleman, I.Universiteit Leiden (UL),Leiden University (UL) (author)

Herschel Planetary Nebula Survey (HerPlaNS) First detection of OH+ in planetary nebulae

  • Article/chapterEnglish2014

Publisher, publication year, extent ...

  • 2014-06-17
  • EDP Sciences,2014
  • electronicrdacarrier

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  • LIBRIS-ID:oai:research.chalmers.se:ff3b0147-c22f-4939-bd71-5c436d3c55e7
  • https://research.chalmers.se/publication/201361URI
  • https://doi.org/10.1051/0004-6361/201322940DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Aims. We report the first detections of OH+ emission in planetary nebulae (PNe). Methods. As part of an imaging and spectroscopy survey of 11 PNe in the far-IR using the PACS and SPIRE instruments aboard the Herschel Space Observatory, we performed a line survey in these PNe over the entire spectral range between 51 mu m and 672 mu m to look for new detections. Results. The rotational emission lines of OH+ at 152.99, 290.20, 308.48, and 329.77 mu m were detected in the spectra of three planetary nebulae: NGC 6445, NGC6720, and NGC 6781. Excitation temperatures and column densities derived from these lines are in the range of 27-47 K and 2 x 10(10)-4 x 10(11) cm(-2), respectively. Conclusions. In PNe, the OH+ rotational line emission appears to be produced in the photodissociation region (PDR) in these objects. The emission of OH+ is observed only in PNe with hot central stars (T-eff > 100 000 K), suggesting that high-energy photons may play a role in OH+ formation and its line excitation in these objects, as seems to be the case for ultraluminous galaxies.

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  • Ueta, T.University of Denver (author)
  • Ladjal, D.University of Denver (author)
  • Exter, K. M.Katholieke Universiteit Leuven (author)
  • Kastner, J. H.Rochester Institute of Technology (author)
  • Montez, R.Vanderbilt University (author)
  • Tielens, AggmUniversiteit Leiden (UL),Leiden University (UL) (author)
  • Chu, Y. H.University of Illinois (author)
  • Izumiura, H.National Astronomical Observatory of Japan (author)
  • McDonald, I.University of Manchester (author)
  • Sahai, R. (author)
  • Siodmiak, N.Polish Academy of Sciences (author)
  • Szczerba, R.Polish Academy of Sciences (author)
  • van Hoof, P. A. M.Royal Observatory of Belgium (author)
  • Villaver, E.Universidad Autonoma de Madrid (UAM) (author)
  • Vlemmings, Wouter,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)wouterv (author)
  • Wittkowski, M.European Southern Observatory (ESO) (author)
  • Zijlstra, A.University of Manchester (author)
  • Universiteit Leiden (UL)University of Denver (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences5660004-63611432-0746

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