Ref: ASTROimport-444

Herschel-SPIRE FTS spectroscopy of the carbon-rich objects AFGL 2688, AFGL 618, and NGC 7027

Wesson, R. ; Cernicharo, J. ; Barlow, M. J. ; Matsuura, M. ; Decin, L. ; Groenewegen, M. A. T. ; Polehampton, E. T. ; Agundez, M. ; Cohen, M. ; Daniel, F. ; Exter, K. M. ; Gear, W. K. ; Gomez, H. L. ; Hargrave, P. C. ; Imhof, P. ; Ivison, R. J. ; Leeks, S. J. ; Lim, T. L. ; Olofsson, G. ; Savini, G. ; Sibthorpe, B. ; Swinyard, B. M. ; Ueta, T. ; Witherick, D. K. ; Yates, J. A.

published in Astronomy and Astrophysics, 518, pp. L144 (2010)

Abstract: We present far-infrared and submillimetre spectra of three carbon-rich evolved objects, AFGL 2688, AFGL 618 and NGC 7027. The spectra were obtained with the SPIRE Fourier-transform spectrometer on board the Herschel Space Observatory, and cover wavelengths from 195-670 µm, a region of the electromagnetic spectrum hitherto difficult to study in detail. The far infrared spectra of these objects are rich and complex, and we measure over 150 lines in each object. Lines due to 18 different species are detected. We determine physical conditions from observations of the rotational lines of several molecules, and present initial large velocity gradient models for AFGL 618. We detect water in AFGL 2688 for the first time, and confirm its presence in AFGL 618 in both ortho and para forms. In addition, we report the detection of the J = 1-0 line of CH+ in NGC 7027. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.Tables 1-4 are only available in electronic form at http://www.aanda.org

DOI: 10.1051/0004-6361/201014589
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The record appears in these collections:
Royal Observatory of Belgium > Astronomy & Astrophysics
Science Articles > Peer Reviewed Articles

 Record created 2016-07-01, last modified 2016-07-06