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A mid-infrared imaging catalogue of post-asymptotic giant branch stars
Post-asymptotic giant branch (post-AGB) stars are key objects for the study of the dramatic morphological changes of low- to intermediate-mass stars on their evolution from the AGB towards the
Post-AGB Objects as a Phase of Stellar Evolution
Preface. Acknowledgements. Organizing Committees. List of Participants. Conference Photo. Introductory Review. Photo-planetary Nebulae as a Phase of Stellar Evolution S. Kwok. Part I: Surveys and
Discovery and analysis of 21 μm feature sources in the magellanic clouds
Spitzer Space Telescope mid-infrared spectroscopy has been obtained for 15 carbon-rich protoplanetary nebulae (PPNe) in the Large Magellanic Cloud (LMC) and for two other such stars in the Small
The mixed chemistry phenomenon in Galactic Bulge PNe
Aims. We investigate the dual-dust chemistry phenomenon in planetary nebulae (PNe) and discuss reasons for its occurrence, by analyzing Spitzer/IRS spectra of a sample of 40 Galactic PNe among which
Herschel PACS and SPIRE Observations of Blazar PKS 1510–089: A Case for Two Blazar Zones
We present the results of observations of blazar PKS 1510–089 with the Herschel Space Observatory PACS and SPIRE instruments, together with multiwavelength data from Fermi/LAT, Swift, SMARTS, and
What drives the Balmer extinction sequence in spiral galaxies? - Clues from the Sloan Digital Sky Survey
Using spectra of normal emission line galaxies from the First Data Release of the Sloan Digital Sky Survey (SDSS) we have investigated the relations between the extinction C(Hβ) as derived from the
On the physical structure of IRC +10216 - Ground-based and Herschel observations of CO and C2H
Context. The carbon-rich asymptotic giant branch star IRC +10 216 undergoes strong mass loss, and quasi-periodic enhancements of the density of the circumstellar matter have previously been reported.
Spitzer Space Telescope spectra of post-AGB stars in the large magellanic Cloud - polycyclic aromatic hydrocarbons at low metallicities
This paper reports variations of polycyclic aromatic hydrocarbons (PAHs) features that were found in Spitzer Space Telescope spectra of carbon-rich post-asymptotic giant branch (post-AGB) stars in
An evolutionary catalogue of galactic post-AGB and related objects
The present knowledge of known post-AGB stars in the galaxy is organized with a view to using it to search for new post- AGB objects among AKARI sources, and criteria for classifying sources into three categories: very likely, possible and disqualified postAGB objects.
Benchmark problems for dust radiative transfer
When verifying a sophisticated numerical code, it is a usual practice to compare the results with reliable solutions obtained by other means. This work provides such solutions for the wavelength