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

I. Aleman; T. Ueta; D. Ladjal; K. M. Exter; J. H. Kastner; R. Montez; A. G G M Tielens; Y. H. Chu; H. Izumiura; I. McDonald; R. Sahai; N. Siódmiak; R. Szczerba; P. A M Van Hoof; E. Villaver; W. Vlemmings; M. Wittkowski; A. A. Zijlstra

doi:10.1051/0004-6361/201322940

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

I. Aleman, T. Ueta, D. Ladjal, K. M. Exter, J. H. Kastner, R. Montez, A. G G M Tielens, Y. H. Chu, H. Izumiura, I. McDonald, R. Sahai, N. Siódmiak, R. Szczerba, P. A M Van Hoof, E. Villaver, W. Vlemmings, M. Wittkowski, A. A. Zijlstra

Research output: Contribution to journal › Article › peer-review

Abstract

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 51μm and 672μm to look for new detections. Results. The rotational emission lines of OH+ at 152.99, 290.20, 308.48, and 329.77μm were detected in the spectra of three planetary nebulae: NGC 6445, NGC 6720, and NGC 6781. Excitation temperatures and column densities derived from these lines are in the range of 27-47 K and 2 × 1010-4 × 1011 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 (Teff> 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. © ESO, 2014.

Original language	English
Article number	A79
Journal	Astronomy and Astrophysics
Volume	566
DOIs	https://doi.org/10.1051/0004-6361/201322940
Publication status	Published - 2014

Keywords

Astrochemistry
Circumstellar matter
Planetary nebulae: general
Planetary nebulae: individual: NGC 6445
Planetary nebulae: individual: NGC 6720
Planetary nebulae: individual: NGC 6781

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Aleman, I., Ueta, T., Ladjal, D., Exter, K. M., Kastner, J. H., Montez, R., Tielens, A. G. G. M., Chu, Y. H., Izumiura, H., McDonald, I., Sahai, R., Siódmiak, N., Szczerba, R., Van Hoof, P. A. M., Villaver, E., Vlemmings, W., Wittkowski, M., & Zijlstra, A. A. (2014). Herschel Planetary Nebula Survey (HerPlaNS): First detection of OH + in planetary nebulae. Astronomy and Astrophysics, 566, Article A79. https://doi.org/10.1051/0004-6361/201322940

@article{a4f04c0314db44b7bfc3b5b9edb89aff,

title = "Herschel Planetary Nebula Survey (HerPlaNS): First detection of OH + in planetary nebulae",

abstract = "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 51μm and 672μm to look for new detections. Results. The rotational emission lines of OH+ at 152.99, 290.20, 308.48, and 329.77μm were detected in the spectra of three planetary nebulae: NGC 6445, NGC 6720, and NGC 6781. Excitation temperatures and column densities derived from these lines are in the range of 27-47 K and 2 × 1010-4 × 1011 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 (Teff> 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. {\textcopyright} ESO, 2014.",

keywords = "Astrochemistry, Circumstellar matter, Planetary nebulae: general, Planetary nebulae: individual: NGC 6445, Planetary nebulae: individual: NGC 6720, Planetary nebulae: individual: NGC 6781",

author = "I. Aleman and T. Ueta and D. Ladjal and Exter, {K. M.} and Kastner, {J. H.} and R. Montez and Tielens, {A. G G M} and Chu, {Y. H.} and H. Izumiura and I. McDonald and R. Sahai and N. Si{\'o}dmiak and R. Szczerba and {Van Hoof}, {P. A M} and E. Villaver and W. Vlemmings and M. Wittkowski and Zijlstra, {A. A.}",

year = "2014",

doi = "10.1051/0004-6361/201322940",

language = "English",

volume = "566",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Aleman, I, Ueta, T, Ladjal, D, Exter, KM, Kastner, JH, Montez, R, Tielens, AGGM, Chu, YH, Izumiura, H, McDonald, I, Sahai, R, Siódmiak, N, Szczerba, R, Van Hoof, PAM, Villaver, E, Vlemmings, W, Wittkowski, M & Zijlstra, AA 2014, 'Herschel Planetary Nebula Survey (HerPlaNS): First detection of OH + in planetary nebulae', Astronomy and Astrophysics, vol. 566, A79. https://doi.org/10.1051/0004-6361/201322940

TY - JOUR

T1 - Herschel Planetary Nebula Survey (HerPlaNS): First detection of OH + in planetary nebulae

AU - Aleman, I.

AU - Ueta, T.

AU - Ladjal, D.

AU - Exter, K. M.

AU - Kastner, J. H.

AU - Montez, R.

AU - Tielens, A. G G M

AU - Chu, Y. H.

AU - Izumiura, H.

AU - McDonald, I.

AU - Sahai, R.

AU - Siódmiak, N.

AU - Szczerba, R.

AU - Van Hoof, P. A M

AU - Villaver, E.

AU - Vlemmings, W.

AU - Wittkowski, M.

AU - Zijlstra, A. A.

PY - 2014

Y1 - 2014

N2 - 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 51μm and 672μm to look for new detections. Results. The rotational emission lines of OH+ at 152.99, 290.20, 308.48, and 329.77μm were detected in the spectra of three planetary nebulae: NGC 6445, NGC 6720, and NGC 6781. Excitation temperatures and column densities derived from these lines are in the range of 27-47 K and 2 × 1010-4 × 1011 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 (Teff> 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. © ESO, 2014.

AB - 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 51μm and 672μm to look for new detections. Results. The rotational emission lines of OH+ at 152.99, 290.20, 308.48, and 329.77μm were detected in the spectra of three planetary nebulae: NGC 6445, NGC 6720, and NGC 6781. Excitation temperatures and column densities derived from these lines are in the range of 27-47 K and 2 × 1010-4 × 1011 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 (Teff> 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. © ESO, 2014.

KW - Astrochemistry

KW - Circumstellar matter

KW - Planetary nebulae: general

KW - Planetary nebulae: individual: NGC 6445

KW - Planetary nebulae: individual: NGC 6720

KW - Planetary nebulae: individual: NGC 6781

U2 - 10.1051/0004-6361/201322940

DO - 10.1051/0004-6361/201322940

M3 - Article

SN - 0004-6361

VL - 566

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A79

ER -

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

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Keywords

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