HD 133656: a new high-latitude supergiant.

Details HD 133656: a new high-latitude supergiant. HD 133656: a new high-latitude supergiant.

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...312..553v&link_type=abstract

Astronomy and Astrophysics, v.312, p.553-559

Astronomy and Astrophysics

Astrophysics

17

Stars: Circumstellar Matter, Stars: Evolution, Stars: Individual: Hd 133656, Stars: Mass Loss, Stars: Agb And Post-Agb

Scientific paper

In the course of our study of post-Asymptotic Giant Branch objects, we discovered that the seventh magnitude A supergiant HD 133656 has an infrared excess emission due to cool circumstellar dust, and that its photospheric abundance pattern is population II like. We present a detailed abundance study of the object, and discuss its nature in terms of post-AGB evolution: its galactic latitude, cold IR-excess, luminosity, abundances and photometric behaviour indicate HD 133656 to be a descendant of the F-type high-latitude supergiants. The deficiencies of the s-process elements are more difficult to understand in a post-AGB evolutinary scenario.

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