Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...272..243c&link_type=abstract
Astronomy and Astrophysics, Vol.272, NO. 1/MAYI, P. 243, 1993
Astronomy and Astrophysics
Astrophysics
10
Stars: Early-Type, Stars: Post-Asymptotic Giant Branch, Stars: Photometry
Scientific paper
Infrared photometry of seventeen high latitude early-type stars, that have either been identified as post-AGB objects or are post-AGB candidates, has been obtained at JHKL and nbM wavelengths. This has been combined with optical and IRAS observations, and compared with LTE model atmosphere fluxes; infrared excesses are found for five stars. Of the known post-AGB stars, only the highest mass objects reveal an infrared excess, suggesting a correlation between the presence of circumstellar material and mass. This may be explained in terms of the very different transition times for high and low mass post-AGB stars from the AGB to becoming a planetary nebula.
Conlon E. S.
Dufton Philip L.
Keenan Francis P.
Little J. E.
McCausland J. H. R.
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