Infrared Observations of Possible Hot Post-Asymptotic Giant Branch Stars

Details Infrared Observations of Possible Hot Post-Asymptotic Giant Branch Stars Infrared Observations of Possible Hot Post-Asymptotic Giant Branch Stars

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.

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