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On the Existence of Bright (Mbol < –6) Upper AGB Stars

Published online by Cambridge University Press:  25 April 2016

S. M. G. Hughes  and
P. R. Wood
S. M. G. Hughes
Affiliation:
Mount Stromlo and Siding Spring Observatories, Australian National University
P. R. Wood
Affiliation:
Mount Stromlo and Siding Spring Observatories, Australian National University
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Abstract

A photometric survey of a central region of the LMC has been undertaken to obtain a magnitude and colour limited sample of bright asymptotic giant branch (AGB) stars; the stars were selected from V and Ic plates taken by the UK Schmidt Telescope Unit (UKSTU) at Coonabarabran. Infrared JHK photometry has been obtained for all the stars in the sample in order to determine bolometric magnitudes, and spectra have been obtained for most of the stars to obtain spectral types. Stars in the sample have bolometric magnitudes up to the AGB limit of Mbol ∼ – 7.1, and many of the stars show evidence for dredge-up of carbon and s-process elements during helium shell flashes. A bolometric luminosity function has been constructed and its behaviour is discussed in terms of possible mass loss scenarios.

Type
Stellar
Information
Publications of the Astronomical Society of Australia , Volume 7 , Issue 2 , 1987 , pp. 147 - 150
Copyright
Copyright © Astronomical Society of Australia 1987

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