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The ISO LWS grating spectrum of NGC 7027

Liu, X. W., Barlow,, M. J., Nguyen, Q. Rieu, Truong, Bach, Cox, P., Pequignot, D., Clegg, P. E., Swinyard, B. M., Griffin, Matthew J., Baluteau, J. P., Lim, T., Skinner, C. J., Smith, H. A., Ade, Peter A. R., Furniss, I., Towlson, W. A., Unger, S. J., King, K. J., Davis, G. R., Cohen, M., Emery, R. J., Fischer, J., Glencross, W. M., Caux, E., Greenhouse, M. A., Gry, C., Joubert, M., Lorenzetti, D., Nisini, B., Omont, A., Orfei, R., Saraceno, P., Serra, G., Walker, H. J., Armand, C., Burgdorf, M., di Giorgio, A., Molinari, S., Price, M., Texier, D., Sidher, S. and Trams, N. 1996. The ISO LWS grating spectrum of NGC 7027. Astronomy and Astrophysics 315 , L257-L260.

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We present a high signal-to-noise ISO Long Wavelength Spectrometer (LWS) grating spectrum of the planetary nebula NGC 7027 from 43-194μm. In total 40 emission lines have been detected, with 30 identified. From the ionized region, we observe fine-structure lines from [N II], [N III] and [O III]. The [O I] and [C II] fine-structure lines from the photodissociation region are the strongest features observed in this spectral region. Amongst the molecular lines, 11 pure rotation CO lines from J=14-13 up to J=24-23 have been detected. The most striking result, however, is the detection in this carbon-rich nebula of the o-H_2_O 179.53μm and the OH 119.3μm fundamental lines. Astrophysical implications are briefly discussed.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: planetary nebulae: general, planetary nebulae: individual: ngc 7027, ism: atoms, ism: molecules
Additional Information:
Publisher: EDP Sciences
ISSN: 0004-6361
Last Modified: 10 Jan 2018 14:47

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