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Herschel Planetary ...
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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
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2014-06-17
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EDP Sciences,2014
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LIBRIS-ID:oai:research.chalmers.se:ff3b0147-c22f-4939-bd71-5c436d3c55e7
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https://research.chalmers.se/publication/201361URI
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https://doi.org/10.1051/0004-6361/201322940DOI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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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)
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Ladjal, D.University of Denver
(author)
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Exter, K. M.Katholieke Universiteit Leuven
(author)
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Kastner, J. H.Rochester Institute of Technology
(author)
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Montez, R.Vanderbilt University
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Tielens, AggmUniversiteit Leiden (UL),Leiden University (UL)
(author)
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Chu, Y. H.University of Illinois
(author)
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Izumiura, H.National Astronomical Observatory of Japan
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McDonald, I.University of Manchester
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Sahai, R.
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Siodmiak, N.Polish Academy of Sciences
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Szczerba, R.Polish Academy of Sciences
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van Hoof, P. A. M.Royal Observatory of Belgium
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Villaver, E.Universidad Autonoma de Madrid (UAM)
(author)
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Vlemmings, Wouter,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)wouterv
(author)
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Wittkowski, M.European Southern Observatory (ESO)
(author)
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Zijlstra, A.University of Manchester
(author)
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Universiteit Leiden (UL)University of Denver
(creator_code:org_t)
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In:Astronomy and Astrophysics: EDP Sciences5660004-63611432-0746
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Aleman, I.
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Ueta, T.
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Ladjal, D.
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Exter, K. M.
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Kastner, J. H.
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Montez, R.
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Tielens, Aggm
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Chu, Y. H.
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Izumiura, H.
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McDonald, I.
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Sahai, R.
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Siodmiak, N.
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Szczerba, R.
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van Hoof, P. A. ...
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Villaver, E.
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Vlemmings, Woute ...
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Wittkowski, M.
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Zijlstra, A.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Chalmers University of Technology