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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
On the search for transits of the planets orbiting gliese 876
Astrophysical Journal, Volume 653, No. 1 I, Year 2006
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Description
We report the results of a globally coordinated photometric campaign to search for transits by the P ∼ 30 day and P ∼ 60 day outer planets of the three-planet system orbiting the nearby M dwarf Gl 876. These two planets experience strong mutual perturbations, which necessitate the use of a dynamical (four-body) model to compute transit ephemerides for the system. Our photometric data have been collected from published archival sources, as well as from our photometric campaigns that were targeted to specific transit predictions. Our analysis indicates that transits by planet c (P ∼ 30 days) do not currently occur, in concordance with the best-fit i = 50° coplanar configuration obtained by dynamical fits to the most recent radial velocity data for the system. Transits by planet b (P ∼ 60 day) are not entirely ruled out by our observations, but our data indicate that it is very unlikely that they occur. Our experience with the Gl 876 system suggests that a distributed ground-based network of small telescopes can be used to search for transits of very low mass M stars by terrestrial-sized planets. © 2006. The American Astronomical Society, All rights reserved.
Authors & Co-Authors
Shankland, Paul D.
Australia, Townsville
James Cook University
United States, Washington, D.c.
U.s. Naval Observatory
Rivera, Eugenio J.
United States, Santa Cruz
University of California, Santa Cruz
Laughlin, Gregory P.
United States, Santa Cruz
University of California, Santa Cruz
Blank, David L.
Australia, Townsville
James Cook University
Price, Aaron
United States, Cambridge
American Association of Variable Star Observers
Gary, Bruce L.
United States, Cambridge
American Association of Variable Star Observers
Bissinger, R.
United States, Cambridge
American Association of Variable Star Observers
Ringwald, Frederick A.
United States, Fresno
California State University, Fresno
White, Graeme L.
Australia, Townsville
James Cook University
Henry, Gregory W.
United States, Nashville
Tennessee State University
McGee, Padric
Australia, Adelaide
The University of Adelaide
Wolf, Aaron S.
United States, Santa Cruz
University of California, Santa Cruz
Carter, Bradley D.
Australia, Toowoomba
University of Southern Queensland
Lee, S.
Australia, Eastwood
Anglo Australian Observatory
Biggs, James D.
Australia, Bickley
Perth Observatory
Monard, Berto L.A.G.
South Africa, Pretoria
Bronberg Observatory
Ashley, Michael C.B.
Australia, Sydney
Unsw Sydney
Statistics
Citations: 19
Authors: 17
Affiliations: 12
Identifiers
Doi:
10.1086/508562
ISSN:
0004637X
e-ISSN:
15384357