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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Kepler observations of the high-amplitude δScuti star V2367Cyg
Monthly Notices of the Royal Astronomical Society, Volume 419, No. 4, Year 2012
Notification
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Description
We analyse Kepler observations of the high-amplitude δScuti (HADS) star V2367Cyg (KIC9408694). The variations are dominated by a mode with frequency f 1= 5.6611d -1. Two other independent modes with f 2= 7.1490d -1 and f 3= 7.7756d -1 have amplitudes an order of magnitude smaller than f 1. Nearly all the light variation is due to these three modes and their combination frequencies, but several hundred other frequencies of very low amplitude are also present. The amplitudes of the principal modes may vary slightly with time. The star has twice the projected rotational velocity of any other HADS star, which makes it unusual. We find a correlation between the phases of the combination frequencies and their pulsation frequencies, which is not understood. Since modes of highest amplitude in HADS stars are normally radial modes, we assumed that this would also be true in this star. However, attempts to model the observed frequencies as radial modes without mode interaction were not successful. For a star with such a relatively high rotational velocity, it is important to consider the effect of mode interaction. Indeed, when this was done, we were able to obtain a model in which a good match with f 1 and f 2 is obtained, with f 1 being the fundamental radial mode. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Authors & Co-Authors
Balona, Luis A.
South Africa, Cape Town
South African Astronomical Observatory
Lenz, Patrick
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Antoci, Victoria L.
Austria, Vienna
Universität Wien
Bernabei, Stefano
Italy, Bologna
Osservatorio Astronomico Di Bologna
Catanzaro, Giovanni
Italy, Catania
Osservatorio Astrofisico Di Catania
Daszyńska-Daszkiewicz, Jadwiga
Poland, Wroclaw
University of Wroclaw
Criscienzo, M. Di
Italy, Monte Porzio Catone
Osservatorio Astronomico Di Roma
Grigahcène, Ahmed
Portugal, Porto
Centro de Astrofísica da Universidade do Porto
Handler, Gerald
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Kurtz, Donald W.
United Kingdom, Preston
University of Central Lancashire
Marconi, Marcella
Italy, Naples
Osservatorio Astronomico Di Capodimonte
Molenda-Żakowicz, Joanna
Poland, Wroclaw
University of Wroclaw
Moya, A.
Spain, Madrid
European Space Astronomy Centre
Nemec, James M.
Canada, Victoria
Camosun College
Pigulski, Andrzej
Poland, Wroclaw
University of Wroclaw
Pricopi, D.
Romania, Bucharest
Academia Româna
Ripepi, Vincenzo
Italy, Naples
Osservatorio Astronomico Di Capodimonte
Smalley, Barry S.
United Kingdom, Keele
Keele University
Suárez, J. C.
Spain, Granada
Instituto de Astrofísica de Andalucía - Csic
Suran, M. D.
Romania, Bucharest
Academia Româna
Hall, Jennifer R.
United States, Moffett Field
Nasa Ames Research Center
Kinemuchi, Karen
United States, Moffett Field
Nasa Ames Research Center
Klaus, Todd C.
United States, Moffett Field
Nasa Ames Research Center
Statistics
Citations: 30
Authors: 23
Affiliations: 16
Identifiers
Doi:
10.1111/j.1365-2966.2011.19939.x
ISSN:
00358711
e-ISSN:
13652966