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Giant Planets and Variable Stars in 47 Tucanae - a Progress Report of a Comprehensive Ground-Based Search

Published online by Cambridge University Press:  26 May 2016

David T. F. Weldrake ,
Penny D. Sackett  and
Terry J. Bridges
David T. F. Weldrake
Affiliation:
Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston Creek, ACT 2611, Australia
Penny D. Sackett
Affiliation:
Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston Creek, ACT 2611, Australia
Terry J. Bridges
Affiliation:
Anglo-Australian Observatory, P.O. Box 296, Epping. NSW, 1710, Australia

Abstract

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Here we present a short progress report of a comprehensive search for variability in the globular cluster 47 Tucanae. Using the MSSSO 40” telescope and a combined V+R filter, we are searching for variability across a 52×52' field centered on the cluster. The main aim is to search for transiting ‘Hot Jupiter’ planets in this cluster, the results of which are still being produced, but a natural side product is a deep catalogue of variable stars within the cluster field. The experiment samples the whole of the cluster (except the inner 5'), thus probing the uncrowded outer regions where the stellar densities are lower, increasing the prospects for the survivability of planetary systems. Half of the currently identified variable stars are new discoveries. We have data for 36,000 stars with masses similar to that of the Sun for the main transit search.

Type
Part 7: Cool Stars and their Planets
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 405 - 410
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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