Photometric Variability in Post-AGB Stars

Details Photometric Variability in Post-AGB Stars Photometric Variability in Post-AGB Stars

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..412..229h&link_type=abstract

The Biggest, Baddest, Coolest Stars ASP Conference Series, Vol. 412, proceedings of the workshop held 16-18 July 2007, at the Mi

Astronomy and Astrophysics

Astronomy

Scientific paper

We are monitoring a large group of post-Asymptotic Giant Branch (AGB) stars, in B, V, R, and I filters in order to detect and characterize the presence of any variability. Of the 34 stars presented here, we found 11 that showed long-term and possibly periodic variability, 16 that had short-term variability, often with large amplitudes and no clear periodicity evident, and 7 that showed little to no variation over the ˜ 2 year span of the observations. The position of these stars on an IRAS two-color plot (van der Veen et al. 1989) suggests that the stars showing long-term variability are younger, not as far into the post-AGB stage, and the stars with shorter term variability are farther along in their lifecycles.

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