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Herschel-SPIRE FTS Spectroscopy of Evolved Stars

Wesson, R., Cernicharo, J., Barlow, M. J., Matsuura, Mikako, Decin, L., Groenewegen, M. A. T., Polehampton, E. T., Agundez, M., Cohen, M., Daniel, F., Exter, K. M., Gear, Walter Kieran, Gomez, Haley Louise, Hargrave, Peter Charles, Imhof, P., Ivison, R. J., Leeks, S. J., Lim, T. L., Olofsson, G., Savini, Giorgio, Sibthorpe, B., Swinyard, B. M., Ueta, T., Witherick, D. K., Yates, J. A., Lebzelter, T. and Wing, R. F. 2010. Herschel-SPIRE FTS Spectroscopy of Evolved Stars. Presented at: Why Galaxies Care About AGB Stars II, Vienna, Austria, 16-20 August 2010. Published in: Kerschbaum, F., Lebzelter, T., Wing, R. F. and Klotz, D. eds. Why galaxies care about AGB stars II : shining examples and common inhabitants : proceedings of a conference held at University Campus, Vienna, Austria, 16-20 August 2010. Astronomical Society of the Pacific conference series , vol. 445. San Francisco, CA: Astronomical Society of the Pacific, pp. 607-612.

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Abstract

We present far-infrared and submillimetre spectra of evolved objects observed with the SPIRE Fourier-transform spectrometer on board the Herschel Space Observatory. The observations cover wavelengths 195–670 μm, a region of the electromagnetic spectrum hitherto difficult to study. The far-infrared spectra of these objects are rich and complex. 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 detect of the J = 1–0 line of CH+ in NGC 7027. Finally, we present new Herschel–SPIRE spectroscopic observations of both O-rich and C-rich evolved sources, and discuss preliminary investigations into their physical conditions.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Astronomical Society of the Pacific
ISBN: 9781583817704
Related URLs:
Last Modified: 04 Jun 2017 03:42
URI: http://orca-mwe.cf.ac.uk/id/eprint/25189

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