The ISO/LWS spectrum of the EGG nebula, AFGL 2688

Cox, P., Gonzalez-Alfonso, E., Barlow, M. J., Liu, X.-W., Lim, T., Swinyard, B. M., Cernicharo, J., Omont, A., Caux, E., Gry, C., Griffin, M. J., Baluteau, J.-P., Clegg, P. E., Sidher, S., Pequignot, D., Rieu, Nguyen Q., King, K. J., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Towlson, W. A., Emery, R. J., Furniss, I., Joubert, M., Skinner, C. J., Cohen, M., Armand, C., Burgdorf, M., Eward, D., Di Giorgio, A., Molinari, S., Texier, D., Trams, N., Unger, S. J., Glencross, W. M., Lorenzetti, D., Nisini, B., Orfei, R., Saraceno, P. and Serra, G. 1996. The ISO/LWS spectrum of the EGG nebula, AFGL 2688. Astronomy and Astrophysics 315 , L265-L268.

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Abstract

We present an ISO Long Wavelength Spectrometer (LWS) grating spectrum of the carbon-rich proto-planetary nebula AFGL 2688 between 43 and 194μm. The far-infrared spectrum of AFGL 2688 is dominated by strong rotational transitions of CO which are detected from J=14-13 up to J=23-22. The atomic fine structure lines [O I] and [C II] are not detected. This is consistent with the cool central star of AFGL 2688 not having yet photodissociated the molecular gas ejected during the AGB phase. The far-infrared CO emission in AFGL 2688 appears to originate in shocked dense gas at a temperature of ~400K.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	EDP Sciences
ISSN:	0004-6361
Date of Acceptance:	13 September 1996
Last Modified:	27 Oct 2022 08:29
URI:	https://orca.cardiff.ac.uk/id/eprint/62471

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