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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Kepler observations of rapidly oscillating Ap, δ Scuti and γ Doradus pulsations in Ap stars
Monthly Notices of the Royal Astronomical Society, Volume 410, No. 1, Year 2011
Notification
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Description
Observations of the A5p star KIC 8677585 obtained during the Kepler 10-d commissioning run with 1-min time resolution show that it is a rapidly oscillating Ap (roAp) star with several frequencies with periods near 10 min. In addition, a low frequency at 3.142 d-1 is also clearly present. Multiperiodic γ Doradus (γDor) and δ Scuti (δ Sct) pulsations, never before seen in any Ap star, are present in Kepler observations of at least three other Ap stars. Since γ Dor pulsations are seen in Ap stars, it is likely that the low frequency in KIC 8677585 is also a γ Dor pulsation. The simultaneous presence of both γ Dor and roAp pulsations and the unexpected detection of δ Sct and γ Dor pulsations in Ap stars present new opportunities and challenges for the interpretation of these stars. Since it is easy to confuse Am and Ap stars at classification dispersions, the nature of these Ap stars in the Kepler field needs to be confirmed. © 2010 The Authors. Journal compilation © 2010 RAS.
Authors & Co-Authors
Balona, Luis A.
Saudi Arabia, Cape Town
South African Astronomical Observatory
Cunha, Margarida S.
Portugal, Porto
Centro de Astrofísica da Universidade do Porto
Kurtz, Donald W.
United Kingdom, Preston
University of Central Lancashire
Brandão, Isa M.
Portugal, Porto
Centro de Astrofísica da Universidade do Porto
Gruberbauer, Michael
Canada, Halifax
Saint Mary's University
Saio, Hideyuki
Japan, Sendai
Tohoku University
Østensen, Roy H.
Belgium, Leuven
Departement Natuurkunde en Sterrenkunde
Elkin, Vladimir G.
United Kingdom, Preston
University of Central Lancashire
Borucki, William J.
United States, Moffett Field
Nasa Ames Research Center
Christensen-Dalsgaard, Joergen
Denmark, Aarhus
Aarhus Universitet
Kjeldsen, Henrik
Denmark, Aarhus
Aarhus Universitet
Koch, David G.
United States, Moffett Field
Nasa Ames Research Center
Bryson, Stephen T.
United States, Moffett Field
Nasa Ames Research Center
Statistics
Citations: 13
Authors: 13
Affiliations: 8
Identifiers
Doi:
10.1111/j.1365-2966.2010.17461.x
ISSN:
00358711
e-ISSN:
13652966