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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Multisite photometric campaign on the high-amplitude δ Scuti star KIC 6382916
Monthly Notices of the Royal Astronomical Society, Volume 433, No. 1, Year 2013
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Description
We present results of a multisite photometric campaign on the high-amplitude δ Scuti star KIC 6382916 in the Kepler field. The starwas observed over a 85-d interval at five different sites in North America and Europe during 2011. Kepler photometry and ground-based multicolour light curves of KIC 6382916 are used to investigate the pulsational content and to identify the principal modes. High-dispersion spectroscopy was also obtained in order to derive the stellar parameters and projected rotational velocity. From an analysis of the Kepler time series, three independent frequencies and a few hundred combination frequencies are found. The light curve is dominated by two modes with frequencies f1 = 4.9107 and f2 = 6.4314 d-1. The third mode with f3 = 8.0350 d-1 has a much lower amplitude. We attempt mode identification by examining the amplitude ratios and phase differences in different wavebands from multicolour photometry and comparing them to calculations for different spherical harmonic degree, l. We find that the theoretical models for f1 and f2 are in a best agreement with the observations and lead to value of l = 1 modes, but the mode identification of f3 is uncertain due to its low amplitude. Non-adiabatic pulsation models show that frequencies below 6 d-1 are stable, which means that the low frequency of f1 cannot be reproduced. This is a further confirmation that current models predict a narrower pulsation frequency range than actually observed.2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Authors & Co-Authors
Ulusoy, Ceren
South Africa, Johannesburg
University of Johannesburg
South Africa, Izmir
Izmir Institute of Technology
Ulaş, Burak
Turkey, Izmir
Ege Üniversitesi
Gülmez, T.
South Africa, Johannesburg
University of Johannesburg
Balona, Luis A.
South Africa, Cape Town
South African Astronomical Observatory
Stateva, Ivanka K.
Bulgaria, Stara Zagora
Institute of Astronomy Bulgarian Academy of Sciences
Iliev, Ilian Kh
Bulgaria, Stara Zagora
Institute of Astronomy Bulgarian Academy of Sciences
Dimitrov, Dinko P.
Bulgaria, Stara Zagora
Institute of Astronomy Bulgarian Academy of Sciences
Kobulnicky, Henry A.
United States, Laramie
University of Wyoming
Pickering, Timothy E.
South Africa, Cape Town
South African Astronomical Observatory
South Africa, Observatory
Southern African Large Telescope Foundation
Fox-Machado, Lester
Mexico, Mexico
Universidad Nacional Autónoma de México
Álvarez, Manuel
Mexico, Mexico
Universidad Nacional Autónoma de México
Michel, Raúl L.
Mexico, Mexico
Universidad Nacional Autónoma de México
Antoniuk, K. А.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Shakhovskoy, D.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Pit’, Nikolaj V.
Ukraine, Bakhchysarai
Crimean Astrophysical Observatory Ras
Damasso, Mario
Italy, Aosta
Astronomical Observatory of the Autonomous Region of the Aosta Valley Oavda
Italy, Padua
Università Degli Studi Di Padova
Cenadelli, Davide
Italy, Aosta
Astronomical Observatory of the Autonomous Region of the Aosta Valley Oavda
Carbognani, Albino
Italy, Aosta
Astronomical Observatory of the Autonomous Region of the Aosta Valley Oavda
Statistics
Citations: 18
Authors: 18
Affiliations: 11
Identifiers
Doi:
10.1093/mnras/stt731
ISSN:
00358711
e-ISSN:
13652966