A search for diffuse bands in the circumstellar envelopes of post-AGB stars
arXiv:0711.1843 · doi:10.1051/0004-6361:20065282
Abstract
In this work we present the results of a systematic search for diffuse bands (DBs, hereafter) in the circumstellar envelopes of a carefully selected sample of post-AGB stars. We concentrated on the analysis of 9 of the DBs most commonly found in the interstellar medium. The strength of these features is determined using high resolution optical spectroscopy and the results obtained are compared with literature data on field stars affected only by interstellar reddening. Based on the weak features observed in the subsample of post-AGB stars dominated by circumstellar reddening we conclude that the carrier(s) of these DBs must not be present in the circumstellar environment of these sources, or at least not under the excitation conditions in which DBs are formed. The conclusion is applicable to all the post-AGB stars studied, irrespective of the dominant chemistry or the spectral type of the star considered. A detailed radial velocity analysis of the features observed in individual sources confirms this result, as the Doppler shifts measured are found to be consistent with an interstellar origin.
arXiv commentAccepted for A&A
References in corpus (13)
- A three-dimensional Galactic extinction model
- The Diffuse Interstellar Bands: A Major Problem in Astronomical Spectroscopy
- A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue
- A Mid-Infrared Imaging Survey of Proto-Planetary Nebula Candidates
- A study of the s-process in the carbon-rich post-AGB stars IRAS06530-0213 and IRAS08143-4406 on the basis of VLT-UVES spectra
- IRAS 08544-4431 : a new post-AGB star in a binary system surrounded by a dusty disc
- Atmospheric Abundances in Post-AGB candidates of Intermediate Temperature
- Photometry and low resolution spectroscopy of hot post-AGB candidates
- An Abundance Analysis of the New Carbon-Rich Proto-Planetary Nebula IRAS 065300213
- Shock emission in the bipolar post-AGB star IRAS 16594-4656
- A high-sensitivity OH 5-cm line survey in late-type stars
- Mid-infrared imaging and modelling of the dust shell around post-AGB star HD 187885 (IRAS 19500-1709)
- An optical absorption study of the Helix Planetary Nebula: NaI and CaII lines, and a search for diffuse bands
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